Cat. Bussmann Medium voltage fuse links 2025 06 EN - 电子书在线预览、各类电子书在线制作-云展网平台

Leadership in fusible

circuit protection

solutions

Bussmann series

Medium voltage fuse links catalogue SERIES

We make what matters work.

At Eaton, we believe that power is a fundamental part

of just about everything people do. That’s why we’re

manage electrical, hydraulic and mechanical power more

lives, the communities where we live and work, and the

planet our future generations depend upon. Because

this is what really matters. And we’re here to make sure

it works.

To learn more go to: Eaton.com/whatmatters

COORDINATION GUIDE PS015002EN—June 2025 www.eaton.com 3

Contact details

Customer satisfaction team

Eaton’s customer satisfaction team is available to answer questions

regarding Eaton’s Bussmann series products.

Europe calls can be made between:

Monday — Thursday 7.30 a.m. - 5.00 p.m. GMT

The customer satisfaction team can be reached via:

Phone: 00 44 (0) 1509 882 600

Email: bulesales@eaton.com

Online resources

Visit www.eaton.com for the following resources:

• Product cross reference

• Product profiles

• Online catalogues for the latest United States and European

catalogues.

Application engineering

Application engineering assistance is available to all customers.

The application engineering team is staffed by university-qualified

electrical engineers who are available with technical and

application support.

European calls can be made between:

Monday — Thursday 8.30 a.m. - 4.30 p.m. GMT

Friday 8.30 a.m. - 4.00 p.m. GMT

Application engineering can be reached via:

Phone: 00 44 (0) 1509 882 699

General technical enquiries: buletechnical@eaton.com

High speed technical enquiries:

bulehighspeedtechnical@eaton.com

We make what matters work.

At Eaton, we believe that power is a fundamental part

of just about everything people do. That’s why we’re

manage electrical, hydraulic and mechanical power more

lives, the communities where we live and work, and the

planet our future generations depend upon. Because

this is what really matters. And we’re here to make sure

it works.

To learn more go to: Eaton.com/whatmatters

4 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

Company overview

Eaton is the leading source of fusible circuit protection

solutions in the global marketplace. Eaton’s Bussmann

series products are approved for use around the world

and meet agency requirements and international

standards: IEC, VDE, DIN, UL, CSA, BS and others.

The headquarters for Eaton’s Bussmann series product line is

located in Burton-on-the-Wolds, Leicestershire (UK) and is part of

Eaton’s Industrial Control and Protection EMEA division.

Eaton manufactures over 50,000 Bussmann series part numbers,

covering extensive fusible circuit protection solutions for a wide

range of applications: residential, industrial, motor protection,

power conversion and distribution.

Eaton has been a leading exponent in the design, development

and manufacture of fuse links and their associated accessories

for more than 100 years and has supplied fuse links to more than

90 countries worldwide.

Eaton's team of specialist Engineers and Field Applications

Engineers plays a leading role in international standardisation

of fuse links offering comprehensive advice on selection and

applications.

With a continual commitment to meet our customers'

needs with innovative high quality products with ISO 9001

'approval systems', Eaton is the supplier of choice for circuit

protection solutions.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 5

Table of content

Introduction to medium voltage fuse link technology . . . . . . . . . . . . . . . . . . 6

How to order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

DIN Fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Motor fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Auxiliary transformer fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Oil fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

British standard air fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

US Style E-Rated fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Fuse clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Expulsion fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Cross references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

DIN Fuse links. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Motor fuse links. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Voltage and auxiliary transformer fuse links. . . . . . . . . . . . . . . . . . . . . . . 96

Oil fuse links. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

British standard air fuse links. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

US Style E-Rated fuse links. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Time current curves and cut-off curves list . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

6 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

Introduction to medium voltage fuse link technology

Offering unparalleled short-circuit interruption capabilities,

Medium Voltage (MV) current-limiting fuse links are the

principle protection device used by electrical utilities and

switchgear manufacturers throughout the world.

Safe, reliable, environmentally friendly and cost effective, MV

Fuse links are the protection device of choice for distribution

circuits due to their speed of operation and current limiting

ability in the event of a short-circuit fault.

The diagram below shows the operation of a fuse link

interrupting a short-circuit fault, achieving a current zero well

within the first half-cycle of a fault. Energy let-through into the

site of a fault maybe typically only 1/500th of that of any other

type of switching device.

Peak amps

Time in seconds

RMS

amps

The speed of operation reduces the effect of short-circuit

currents, dramatically limiting the energy delivered to the

faulted circuit, preventing the catastrophic results of high faults

and disturbing voltage arcs. The fuse link operation significantly

limits the arc-flash hazard at the fault location. Improved

power supply quality also results from the use of fuse links.

High fault currents are interrupted in a few milliseconds,

minimising voltage dips in system supply voltage.

The main standard covering Medium voltage (MV) fuse links is

IEC 60282-1, 2009. IEC defines MV as from 1 kV to 72.5 kV.

Current-limiting MV Fuse links, split into three internationally

recognised types: back-up (or sometimes called partial range),

fuse links, which will interrupt any current from their rated

Breaking capacity down to a Minimum breaking current,

specified by the manufacturer. General purpose MV Fuse links

will interrupt all currents that will melt the elements within

one hour. Full range MV Fuse links can interrupt any current

below the rated Breaking capacity that melts the fuse elements

satisfactorily.

The diagram below illustrates the three performance criteria in

terms of their Minimum breaking current I3.

Back-Up

Fuse Link

General Purpose

Fuse Link

Full Range

Fuse Link

Medium Voltage electrical fuse link performance to IEC 60282-1

Zone of uncertain protection

Zone of uncertain

protection

Minimum Breaking

Current (MBC) I3

Typically 1.1 x IN

Minimum fusing

current under

DERATED conditions

Minimum fusing

current in free air

Typically 1.4 x IN

Minimum Breaking

Current (MBC)

Typically 1.8 x IN

Minimum Breaking

Current (MBC)

Typically 3 x IN

Current (amps)

Current-limiting MV Fuse links are similar in construction to

Low voltage (LV) cartridge types. Fuse elements do need to

be much longer however to safely interrupt a medium voltage

short-circuit. This is achieved by winding the elements round

an internal core or holder, often called a star-core or spider;

using this technique a one metre length element can be

accommodated in a 250 mm length body. The elements are

surrounded by a pure, highly compacted granular quartz filler.

Like a LV fuse link, a MV Fuse link has a ceramic body. Most

current-limiting MV Fuse links are also fitted with a striker

mechanism. This is used to operate the trip bar or mechanism

in a fuse-switch combination, fuse-switch or ring main unit

(RMU) to achieve low overload fault interruption and threephase disconnection.

Typically striker mechanisms are driven by a spring mechanism,

triggered by a thin striker wire or striker coil running the length

of the fuse link, connected in parallel to the fuse link elements.

The striker coil is of much higher resistance than the fuse

link elements, so a current only flows through the striker coil

when the fuse link elements melt. The current heats up the

striker coil and this in turn melts the wire retaining the spring,

releasing it and pushing out the striker.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 7

End cap

Weather seal

Porcelain barrel

Striker coil Striker

Fuse elements Star core Granular quartz

Porcelain

barrel

Granular

quartz

Striker

coil

Elements

Starcore

Non-current limiting

Essentially, non-current limiting fuse links have short elements

and incorporate some means of lengthening the arc after the

element melts, extinguishing the arc and preventing re-ignition.

These are known as expulsion fuse links.

Expulsion fuse links are an effective way of protecting overhead

distribution lines and transformers. They are designed for

outdoor use only and comprise a tin or copper fuse element in

series with a flexible braid in a tube. The tube forms one side

of a triangle, with a latched connection at the top and a hinge

at the bottom. The braid emerges from one end of the fuse link

and is held in tension by a spring downwards under gravity.

Under fault conditions, the fuse link swings downwards, the arc

is lengthened, extinguished and prevented from restriking.

Thermal effects of low overload faults

During overload faults lasting a long time, it is possible for

medium voltage (MV) elements to get very hot prior to actually

melting. Given that silver has a melting temperature of 960oC,

for fuse links with no temperature limitation, this can result

in a fuse barrel temperature of over 400oC and 180oC at

the insulating surface surrounding the fuse. To prevent

deterioration of the insulation and to the fuse link itself, all MV

Fuse links should incorporate some form of technology to limit

the thermal stress- heating, that is possible under prolonged

low overload faults, often referred to as temperature limiting

technology.

Since the launch of its first MV Fuse links almost half a century

ago, Eaton has employed M-effect technology to achieve

temperature limitation throughout its MV Fuse link range. A

small mass of special low melting point alloy is added to each

fuse element, this has the effect of drastically reducing the

temperature of the MV Fuse link during operation. The larger

cross section of the fuse link elements, made possible by

use of this feature, ensures cooler running and lower power

dissipation under normal service conditions than comparable

temperature limitation technology.

Other manufacturers employ a temperature-limiting (or

thermal) striker to overcome their overheating problems.

In general with this approach the maximum temperatures

reached by the fuse link and its surrounding insulation are

not as low as with the use of M-effect. Such a solution is no

more effective than use of M-effect on the fuse link elements

and moreover does not bring the additional advantages of

lower watts loss, cooler running and greater withstand against

transient surge currents.

When an Eaton’s Bussmann series fuse link operates under

low overload fault conditions the maximum temperature rise

of the fuse link is such that the temperature of the surrounding

synthetic insulation remains below the temperature limits for

all insulated fuse switchgear. The fuse barrel therefore remains

intact and the fuse carrier and its contacts remain unimpaired.

Typically an Eaton’s Bussmann series MV Fuse link of a given

rating may run 10-30oC cooler than comparable fuse links

which do not employ M-effect. This advantage is particularly

useful when the MV Fuse link is used in totally enclosed all

insulated switchgear, such as cast resin fuse-switches or

compact SF6 insulated Ring Main Units (RMUs), or GIS HV

switchgear, since less derating is required and hence a smaller

rating of MV Fuse link will do the same job as a higher rated MV

Fuse link from another manufacturer.

In short M-effect fuse links are generally safer, give better

protection and are longer lasting than alternative designs,

which do not employ these valuable features.

GLOSSARY FOR MEDIUM VOLTAGE FUSE LINKS

The following is a brief introduction to medium voltage

fuse link technology. Some of the terms are also used in

other areas of fuse technology.

Current rating/Current, In - The current of the fuse link,

given in amps.

• Derating - A reference to the fact that all MV Fuse links

must be derated once they are placed in a confined

space, for example when mounted in switchgear. The

fuse link must be derated to take into account the effect

of heating on element resistance. Typically a fuse link is

derated by between 5-20% depending on application.

• Test Duty, TD - A term used to refer to a specific type

test within the IEC standard. Test Duty one (TD1), shortcircuit test, Test Duty two (TD2), maximum arc energy

test and Test Duty three (TD3), low overcurrent test.

• Minimum Breaking capacity Current, MBC, I3 - The

minimum current the fuse link can interrupt safely,

without assistance from switchgear with instantaneous

striker tripping.

• Minimum Fusing Current (MFC) - The minimum current

which will cause the fuse link elements to start to melt.

• I

T - The minimum value of pre-arcing and maximum

value of total clearing energy a fuse link will allow

to pass through it during short circuit operation,

expressed as an amount of current (I2), multiplied by

time in seconds.

• Watts loss - The power dissipation of the fuse link at a

stated value of load current.

• Breaking capacity, I1 - The maximum short circuit

current the fuse link has been tested to in accordance

with test Duty one (TD1), expressed in kA.

• Resistance - The resistance of the fuse link in free air at

(20oC), measured in mΩ.

Introduction to medium voltage fuse link technology

8 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

How to order (20oC), measured in mΩ.

Ordering key

Symbol

1 2 3 4 5 6 7 Meaning

X Voltage of the fuse link in kV

X The type of fuse link given by a single letter

X Diameter of the fuse link barrel (in mm) denoted by a letter

X Length of the fuse link barrel (in mm) denoted by a letter

X Striker information: type of striker is denoted by a letter *

X Tag information: type denoted by a letter

X Current rating of the fuse link given in amperes

Ordering code information Type designation

Voltage of the fuse link 12

Type of fuse link T

Body diameter D

Body length L

Type of striker E

Type of tag J

Current rating 50

Complete part numbers 12 T D L E J 50

Example: 12TDLEJ50

kV 1st Letter general type

2nd Letter

barrel

diameter

(mm)

3rd

Letter

barrel

length

(mm) 4th Letter striker (mm)

5th/6th letter and or digit —

termination or fixing

Amps

A, B, D, N = fuse links for use in air

V, W = fuse links primarily for use in motor circuits

F = fuse links with Full range characteristics

O = fuse links sealed for use in oil switches

T = DIN Outdoor range

M = 20.6

B = 25.4

D = 50.8

E, H, L = 63.5

F, I, K = 76.2

X = 88

U = 86

W = 142

O = 192

C = 195

D = 203

F = 254

L = 292

G = 359

N = 403

M = 442

Q = 537

I = 565

K = 914

S = Striker to DIN 43625, form C 50N

E = Striker to DIN 43625, 80N

H,M = Striker to BS 2692-1

N = None fitted

A = No Tags. Ferrule diameter as the

2nd letter

B = Offset tag, single bolt fixing

C, D = Tags to BS2692-1

F = Offset tag, double bolt fixing

J = Ferrule to DIN 43625

O = Tags to BS 2692-1

6 = Tags to BS 2692-1

22 = 5/16-BSW stud one end only

02, 03 = Double and triple barrel fuse link

F2, F3 = Double and triple barrel fuse link

Parts referencing system

1 — Voltage

2 — Type designation letter

3 — Barrel diameter

4 — Barrel length

5 — Striker information *

6 — Tag information

* S = Spring striker 50N

* E = Spring striker 80N

* N = No striker fitted

* H or M = Pyrotechnic striker

Part numbers 12TDLEJ50

represents an outdoor DIN Fuse

rated at 12 kV for use in Air (T)

with a body diameter of 50.8mm

(D), a barrel length of 292mm (L),

a striker to DIN 43625 80N (E), a

tag arrangement to DIN 43625 (J)

and an Amp rating of 50A.

Note: Most of these fuse types are suitable for outdoor use. A variety of alternative tag arrangements are also available, details on request from Eaton’s application engineers buletechnical@eaton.com.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 9

DIN Medium voltage fuse links

Introduction to DIN Medium voltage fuse links . . . . . . . . . . . . . . . . . . . . . . . 10

Features and benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

General guide to the selection of DIN Fuse links . . . . . . . . . . . . . . . . . . . . . . 12

3.6 kV ‘A’ and ‘W’ Range current limiting back-up fuse links . . . . . . . . . . . . 14

7.2 kV ‘T’ Range current limiting back-up fuse links . . . . . . . . . . . . . . . . . . . . 15

12 kV ‘F’ Range current limiting full range fuse links . . . . . . . . . . . . . . . . . . . 16

12 kV ‘A’ and ‘T’ Range current limiting back-up fuse links . . . . . . . . . . . . . . 17

17.5 kV ‘A’ and ‘T’ Range current limiting back-up fuse links . . . . . . . . . . . . 18

24 kV ‘F’ Range current limiting full range fuse links . . . . . . . . . . . . . . . . . . . 19

24 kV ‘A’ and ‘T’ Range current limiting back-up fuse links . . . . . . . . . . . . . . 20

36 kV ‘T’ Range current limiting back-up fuse links . . . . . . . . . . . . . . . . . . . . 21

Striker force diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Introduction

10 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

• Fuse links comply with DIN Dimensional standard DIN

43625.

• ‘F’ Range, high performance full range fuse links.

• ‘T’ Range, high performance back-up fuse links, with

striker tripping.

• ‘A’ Range, including high current rating back-up fuse link.

• Comply with IEC 60282-1 and VDE 0670 part 4.

• Wide variety of ratings, 3.6 kV to 36 kV.

• ‘T’ Range is suitable for outdoor use.

• Motor circuit fuse link option, see motor fuse links section

page 24.

Eaton’s Bussmann series ‘T’ Range

Eaton’s Bussmann series ‘T’ range medium voltage

currentlimiting fuse links, to dimensional standard DIN 43625,

are one of the most advanced design of medium voltage fuse

links available anywhere in the world today. Developed by

Eaton, they comply with the very latest requirements of IEC

60282-1, are lead and cadmium free (meeting the RoHS and

WEE directives) and have been designed to meet current and

future global electrical utility specifications.

The ‘T’ range offers time-current characteristics that are

optimised to improve discrimation with upstream devices,

giving fast clearance of earth faults in secondary terminal

zones. The fuse links utilise Eaton’s M-effect technology,

ensuring low power consumption during operation, while at

the same time providing temperature limitation in the event of

an overload fault.

The fuse links are suitable for both indoor and outdoor

applications and are fitted with a spring striker. This gives

either an output force of 80N with a travel of 30 mm in the

case of fuse links with part numbers sequence ‘E’, or in the

case of part numbers referring to ‘S’, a spring striker with an

output force of 50 N and a maximum travel of 26 mm.

Eaton’s Bussmann series ‘F’ Range

Eaton’s Bussmann series ‘F’ range fuse links have ‘full range’

clearing capability. They are designed to clear low overloads

right down to the fuse links’ Current in accordance with the

latest IEC 60282-1 requirements. They are thus suitable

for use as a sole form of protection. ‘F’ range time-current

characteristics are especially advantageous for transformer

protection applications.

Eaton’s Bussmann series ‘A’ Range

This earlier, well proven, design has values of minimum

breaking current between the ‘T’ and ‘F’ range including higher

current ratings.

Applications

MV DIN Fuse links are suitable for primary side transformer

protection, fuse switch combination unit, fuse bases and

fuse switches.

Introduction to DIN Medium voltage fuse links

Introduction

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 11

Certification. Eaton’s Bussmann series Medium Voltage (MV)

DIN range of fuse links has been fully tested and certified.

Interrupting performance has been certified at the world class

independent test laboratories of KEMA. All other performance

requirements such as temperature-rise, time-current

characteristics, weather sealing etc. have been thoroughly

tested to ASTA approval procedures.

All Eaton’s Bussmann series medium voltage DIN Fuse links

exhibit cool running and low power dissipation during normal

operation in service. The use of M-effect, drastically reduces

the temperature of the fuse link during operation. The larger

cross section of the fuse link elements made possible by using

M-effect ensures cooler running and low power dissipation

under normal service conditions. This ensures maximum levels

of network efficiency by reducing unnecessary power loss and

minimizing switchgear wear and tear due to the fact the fuse

link is running much cooler during its service life.

Cool operation. When Eaton’s Bussmann series MV Fuse links

operate under low fault conditions, the maximum temperature

rise of the fuse link is well within the temperature limits for all

switchgear due to the use of M-effect, ensuring fuse carrier

contacts remain unimpaired, thereby increasing the life cycle of

the substation and so reducing capital and maintenance costs.

Silver elements. All Eaton’s Bussmann series back-up MV

Fuse links use 99.8% pure silver in their elements, ensuring

high conductivity and low power (revenue) loss, maximising

network efficiency.

Reduced nuisance operation due to surge currents. The

use of M-effect allows a larger element cross section for a

given current rating, improving withstand capability against

transient overcurrents due to transformer magnetizing

inrush current, reducing mal operation. This improves system

reliability reducing maintenance costs.

Low arc voltages during short-circuit operation. Eaton’s

Bussmann series MV Fuse links are designed to produce low

levels of arc voltage, allowing fuse link to be used down to half

their Voltage, so during short-circuit operation, the switchgear

and cables are not unduly stressed by being exposed to high

arc voltages, thereby prolonging the life of the switchgear and

improving asset utilisation.

Additionally, stock holdings and part numbers can be reduced,

as a 24 kV Eaton’s Bussmann series MV DIN fuse link can be

used on a 12 kV system. Utilities that run a mixed voltage

network (say 24, 15.5, 13.8 12 and 10 kV) can standardise on

one type of switchgear with one type of fuse link, reducing

costs and removing the need for an additional fuse extension

and inventory.

Construction. All electrical connections within the Eaton’s

Bussmann series MV Fuse link are made by welded or brazed

joints. This firstly ensures a very mechanically robust fuse link

and secondly, greatly reduces the risk of poor intermittent

internal contacts, improving substation reliability.

X-Ray. All Eaton’s Bussmann series MV Fuse links are X-rayed

during production. Element alignment, M-effect position, etc

are all checked by trained operators. This process ensures

defects that would not normally be detected by purely visual

or electrical based quality systems, to be captured during

production.

Element design. Unlike many other medium voltage fuse

link manufacturers, Eaton’s Bussmann series medium voltage

fuse elements employ a “neck” or ‘notch’ design principle

as opposed to a perforated element design principle,

see diagram below.

Eaton - Neck or notch design

Other Medium voltage fuse links with perforated designs

This element design insures that even the smallest degree of

accidental element damage is easily detected during testing, as

part of the manufacturing process thus avoids the possibility

of such imperfect fuses being put into service. This is far more

difficult to achieve with perforated element designs.

Lead and cadmium Free. All Eaton’s Bussmann series ‘T’

Ranges fuse links are lead and cadmium free and meet with the

latest WEEE and RoHS directives. RoHS is less than 1000 VAC.

Recycling scheme. Eatons operates a recycling scheme for

all medium voltage fuse links, please contact buletechnical@

eaton.com for further information.

Features and benefits

12 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

Back-up fuse links

Selection guide using low voltage fuse links operating class gG/gL on low voltage side for individual cable exit protection

see figure 1.

General guide to the selection of DIN Back-up fuse links

Selection guide using low voltage fuse links operation class gG/gL on low voltage side for overload protection of the transformer, see figure 2.

Figure 1 Individual cable exit protection Figure 2 Overload protection of the transformer

Figure 1: shows single exit from

transformer. The cable exits the

transformer and is fed directly to the

distribution system. There is no secondary

overload fuse protection. So the MV

primary fuse must coordinate with the

largest fuse within the distribution panel.

Figure 2: Shows a fuse fitted as

secondary overload protection directly

on the transformer secondary output.

The preferred method, the MV primary

fuse must coordinate with the secondary

overload LV fuse.

Transformer primary voltage

10 kV 20 kV 30 kV

Fuse links type Transformer

rating

Current of the

medium voltage fuse link

Current of the

medium voltage fuse link

Current of the

medium voltage fuse link

Back-up fuse links ( kVA) Min Max Min Max Min Max

50 6.3 10 6.3 6.3 3.15 3.15

100 16 25 6.3 10 6.3 10

125 16 25 10 16 6.3 10

160 20 31.5 10 20 6.3 10

200 20 40 16 25 10 16

250 25 50 16 25 10 16

315 31.5 63 20z 31.5 16 16

400 40 80 20 40 16 25

500 50 100 25 50 16 31.5

630 63 125 31.5 63 20 40

800 80 125 40 63 25 40

1000 100 125 50 80 31.5 50

1250 125 200 63 80 40 50

1600 160 200 71 125 50 63

2000 200 200 100 160 63 63

Transformer primary voltage

10 kV 20 kV 30 kV

Fuse links type Transformer

rating

Current of the

medium voltage fuse link

Current of the

medium voltage fuse link

Current of the

medium voltage fuse link

Low voltage

NH Fuse size gG/gL

Back-up fuse links ( kVA) Min Max Min Max Min Max (A)

50 10 10 6.3 6.3 3.15 3.15 63

100 16 25 10 10 6.3 10 125

125 20 25 10 16 6.3 10 160

160 25 31.5 16 20 10 10 200

200 31.5 40 16 25 16 16 250

250 40 50 20 25 16 16 315

315 50 63 25 31.5 16 20 400

400 63 80 31.5 40 20 25 500

500 80 100 40 50 25 31.5 630

630 100 125 63 63 31.5 40 800

800 125 160 63 63 40 40 1000

1000 200 200 80 80 50 50 1250

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 13

Full range fuse links

Selection guide using low

voltage fuse links operating

class gG/gL on low voltage

side for individual cable

exit protection, see figure 1

opposite page.

General guide to the selection of DIN Full range fuse links

Selection of these MV Fuse links has been based

on the followings:

1. The fuse link should withstand transformer

magnetising inrush currents, taken as 12 times full

load current for 0.1 seconds.

2. The primary MV Fuse link should discrimate with the

secondary LV Fuse in all cases as shown in figure 2.

Where individual cable exit is used and no secondary

LV Fuse is fitted, the MV Fuse should discriminate with

the largest fuse fitted downstream to the secondary

side of the transformer at the distribution panel.

3. The fuse link should operate within two seconds

for transformers complying with IEC 60076-5 in

respect of impedance, voltage and short-circuit

withstand current.

4. The fuse link should operate reasonably quickly

in the event of a transformer internal fault or an

earth fault in the secondary terminal zone of the

transformer.

5. In the case where there is no secondary fuse link for

overload protection, the minimum recommended

MV Fuse link rating applies to the use of fuse links

in encapsulated enclosures where permissible

continuous overload is generally limited to 120% of

transformer full load current. However, if greater

overload currents are permissible, a higher rating of

fuse link may be required. Where the fuse link is used

in open air or conditions of unrestricted ventilation a

higher permissible overload may be possible.

6. In most cases more than one rating of MV Fuse link

is recommended for a particular transformer size.

Choice of fuse link will then depend on which fuse link

offers the best protection; e.g., having one fuse link for

several transformer sizes.

Recommendations for other voltage are available on request,

please email buletechnical@eaton.com.

Selection guide using

low voltage fuse links

operating class gG/gL

on low voltage side for

overload protection of

the transformer, see

figure 2 opposite page

Transformer primary voltage

10 kV 20 kV

Fuse links type Transformer

rating

Current of the

medium voltage fuse link

Current of the

medium voltage fuse link

Full range fuse links ( kVA) Min Max Min Max

50 6.3 10 6.3 6.3

100 10 20 6.3 10

125 16 25 6.3 16

160 16 31.5 10 16

200 20 40 10 20

250 25 50 16 25

315 31.5 63 16 31.5

400 40 80 20 40

500 50 100 25 45

630 63 100 31.5 45

800 80 100 40 45

1000 100 100 45 45

Transformer primary voltage

10 kV 20 kV

Fuse links type Transformer

rating

Current of the

medium voltage fuse link

Current of the

medium voltage fuse link

Low voltage

NH Fuse size gG/gL

Full range fuse links ( kVA) Min Max Min Max (A)

50 6.3 6.3 6.3 6.3 80

100 10 10 10 10 125

125 16 16 10 10 160

160 16 20 16 16 200

200 20 31.5 16 16 250

250 31.5 40 16 20 315

315 40 40 20 20 400

400 40 63 25 31.5 500

500 50 63 31.5 40 630

630 100 100 40 45 800

800 100 100 - - 1000

14 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

3.6 kV - ‘A & W’ Range current limiting back-up fuse links

Specifications

Description

A range of medium voltage DIN Fuse links, complete with

striker, suitable for transformer protection. The fuse links

can be used even when there is no secondary low voltage

protection, provided they are used with fuse switches fitted

with instantaneous striker tripping mechanism.

Typical applications

• Primary side transformer protection.

• Used in fuse switch combination unit.

• Used in fuse bases.

• Used in fuse switches.

Ratings

Voltage: 3.6 kV

Current: 6.3 - 200 A

Breaking capacity: 40 - 50 kA.

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE 0670

part 4 and with IEC 60282-1 (2005).

Suitable for outdoor use.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Dimensions - mm

Fuse reference A C D Weight (Kg)

ADLSJ 292 54 51 1.63

ADOSJ 192 54 51 1.1

WDOSJ 192 54 51 1.1

WFOSJ 192 76 76 2.1

26mm maximum travel after operation

ØD

Ø45

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1(kA)

Minimum

breaking

current

I3(A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

3.6ADLSJ6.3 In (A) 40 13 158 9 4.5 x 101 1.9 x 102 292 51 1.63

3.6ADLSJ10 10 40 13 95.6 13 1.3 x 102 5.4 x 102 292 51 1.63

3.6ADLSJ16 16 40 20 63.3 22 3 x 102 1.3 x 103 292 51 1.63

3.6ADLSJ20 20 40 31 45.9 25 6.3 x 102 2.7 x 103 292 51 1.63

3.6ADLSJ25 25 40 106 28.7 25 1.3 x 102 1.2 x 103 292 51 1.63

3.6ADLSJ31.5 31.5 40 106 19.1 26 2.9 x 102 2.7 x 103 292 51 1.63

3.6ADLSJ40 40 40 106 11.4 25 8 x 102 7.5 x 10 292 51 1.63

3.6ADOSJ6.3 6.3 40 13 158 9 4.5 x 101 1.9 x 102 192 51 1.1

3.6ADOSJ10 10 40 31 79.2 11 2.3 x 102 9.7 x 102 192 51 1.1

3.6ADOSJ16 16 40 49 50.8 18 5.5 x 102 2.4 x 103 192 51 1.1

3.6ADOSJ20 20 40 49 38.1 21 9.8 x 102 4.2 x 103 192 51 1.1

3.6ADOSJ25 25 40 106 28.9 25 1.3 x 102 1.2 x 103 192 51 1.1

3.6ADOSJ31.5 31.5 40 106 19.2 26 2.9 x 102 2.7 x 103 192 51 1.1

3.6ADOSJ40 40 40 106 11.6 26 8 x 102 7.5 x 103 192 51 1.1

3.6WDOSJ50 50 50 180 5.36 20 1.8 x 103 2.4 x 103 192 51 1.1

3.6WDOSJ63 63 50 225 3.68 21 3.8 x 103 4.5 x 103 192 51 1.1

3.6WDOSJ80 80 50 288 2.88 27 6.3 x 103 8 x 104 192 51 1.1

3.6WDOSJ100 100 50 360 2.16 31 9.8 x 103 1.1 x 105 192 51 1.1

3.6WDOSJ125 125 50 450 1.73 39 1.5 x 104 2.2 x 105 192 51 1.1

3.6WFOSJ160 160 50 600 1.28 47 3.1 x 104 6.2 x 105 192 76 2.1

3.6WFOSJ200 200 50 600 0.94 52 5.7 x 104 1.1 x 106 192 76 2.1

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 15

7.2 kV - ‘T’ Range current limiting back-up fuse links

Specifications

Description

A range of medium voltage DIN Fuse links complete with

striker, suitable for transformer protection. The fuses can be

used even when there is no secondary low voltage protection,

provided they are used with fuse switches fitted with

instantaneous striker tripping.

Typical applications

• Primary side transformer protection.

• Used in fuse switch combination unit.

• Used in fuse bases.

• Used in fuse switches.

Ratings

Voltage: 3 - 7.2 kV

Current: 6.3 - 160 A

Breaking capacity: 40 kA

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE 0670

part 4 and with IEC 60282-1 (2005). Suitable for indoor and

outdoor use.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Dimensions - mm

Fuse reference A C D Weight (Kg)

TDLSJ 292 54 51 1.63

TFLSJ 292 80 76 3.1

26mm maximum travel after operation

ØD

Ø45

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1(kA)

Minimum

breaking

current

I3(A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

7.2TDLSJ6.3 6.3 40 20 205 11 4.8 x 101 6.5 x 103 292 51 1.63

7.2TDLSJ10 10 40 31 99.7 19 2.5 x 102 2.7 x 103 292 51 1.63

7.2TDLSJ16 16 40 49 65.1 23 5.5 x 102 8.2 x 103 292 51 1.63

7.2TDLSJ20 20 40 49 48.9 27 9.7 x 102 1.1 x 104 292 51 1.63

7.2TDLSJ25 25 40 80 32.6 28 5.7 x 102 8 x 103 292 51 1.63

7.2TDLSJ31.5 31.5 40 100 26 36 8.9 x 102 1 x 104 292 51 1.63

7.2TDLSJ40 40 40 114 16 36 2 x 103 2.2 x 104 292 51 1.63

7.2TDLSJ50 50 40 143 12.9 46 3.2 x 103 3.2 x 104 192 51 1.63

7.2TDLSJ63 63 40 180 8.14 45 8 x 103 7.5 x 104 292 51 1.63

7.2TFLSJ80 80 40 264 61 54 5 x 103 6.5 x 104 292 76 3.1

7.2TFLSJ100 100 40 338 4.65 64 9.1 x 103 1.1 x 105 292 76 3.1

7.2TFLSJ125 125 40 375 3.60 79 1.5 x 104 1.7 x 105 292 76 3.1

7.2TFLSJ160 160 40 525 2.73 97 3 x 104 3.1 x 105 292 76 3.1

16 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

12 kV - ‘F’ Range current limiting full range fuse links

Description

A range of medium voltage DIN Fuse links, complete with

sealed striker, suitable for transformer protection. Eaton’s ‘F’

range provide full range protection.

Ratings

Voltage: 12 kV

Current: 6.3 - 100 A.

Breaking capacity: 50 kA.

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE

0670 part 4, VDE 0670 part 402 and with IEC 60282-1 (2005).

Suitable for indoor use.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

• Our full range MV Fuse links can interrupt any current below

the rated breaking capacity.

Typical applications

• Primary side transformer protection.

• Used in fuse switch combination unit.

• Used in fuse bases without instantaneous striker tripping.

• Used in fuse switches.

Dimensions - mm

Fuse reference A C D Weight (Kg)

FDLSJ 292 54 51 1.63

FFLSJ 292 80 76 3.16

FXLSJ 292 92 88 4

26mm maximum travel after operation

ØD

Ø45

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

12FDLSJ6.3 6.3 50 6.3 208 10 6.9 x 101 6.3 x 102 292 51 1.63

12FDLSJ10 10 50 10 116 15 2.2 x 102 2.1 x 103 292 51 1.63

12FDLSJ16 16 50 16 55.4 17 8.8 x 102 3.9 x 103 292 51 1.63

12FDLSJ20 20 50 20 39.6 20 1.7 x 103 7.6 x 103 292 51 1.63

12FDLSJ25 25 50 25 31.2 26 2.8 x 103 1.3 x 104 292 51 1.63

12FDLSJ31.5 31.5 50 31.5 26.4 36 2.6 x 103 1.3 x 104 292 51 1.63

12FFLSJ40 40 50 40 19.7 42 3.8 x 103 3.8 x 104 292 76.2 3.16

12FFLSJ50 50 50 50 14.8 51 6.8 x 103 5.6 x 104 292 76.2 3.16

12FFLSJ63 63 50 63 12.4 72 5.1 x 103 5.4 x 104 292 76.2 3.16

12FXLSJ80 80 50 80 7.94 72 2.2 x 104 1.1 x 105 292 88 4

12FXLSJ100 100 50 100 5.64 82 4.2 x 104 2 x 105 292 88 4

Specifications

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 17

12 kV - ‘A’ and ‘T’ Range current limiting back-up range fuse links

Specifications

Description

A range of medium voltage DIN Fuse links, complete with

sealed striker, suitable for transformer protection. The fuse

links can be used even when there is no secondary low voltage

protection, provided they are used with fuse switches fitted

with instantaneous striker tripping.

Ratings

Voltage: 6 - 12 kV

Current: 6.3 - 200 A

Breaking capacity: 50 - 63 kA

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE

0670 part 4, VDE 0670 part 402 and with IEC 60282-1 (2005).

Suitable for indoor and outdoor use.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation, thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our high voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Primary side transformer protection

• Used in fuse switch combination unit

• Used in fuse bases

• Used in fuse switches.

Dimensions - mm

Fuse reference A C D Weight (Kg)

AILSJ 292 79 76 3.3

TDLEJ 292 54 51 1.7

THLEJ 292 67 64 2.6

TKLEJ 292 80 76 3.5

TXLEJ 292 88 88 3.7

THMEJ 442 67 64 3.7

TFMSJ 442 80 76 5.1

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

12TDLEJ6.3 6.3 63 23 222 10 9.8 x 101 1 x 103 292 51 1.7

12TDLEJ10 10 63 35 131 16 2.8 x 102 2.3 x 103 292 51 1.7

12TDLEJ16 16 63 53 54.6 16 2.6 x 102 3.9 x 103 292 51 1.7

12TDLEJ20 20 63 73 39.1 18 5.2 x 102 5.4 x 103 292 51 1.7

12TDLEJ25 25 63 87 31.2 24 8.1 x 102 8.4 x 103 292 51 1.7

12TDLEJ31.5 31.5 63 111 23.4 28 1.4 x 103 1.5 x 104 292 51 1.7

12TDLEJ40 40 63 143 17.2 36 2.4 x 103 2.5 x 104 292 51 1.7

12TDLEJ50 50 63 168 13.5 47 2.8 x 103 3.1 x 104 292 51 1.7

12TDLEJ63 63 63 235 10.6 60 4.3 x 103 4.7 x 104 292 51 1.7

12THLEJ80 80 63 272 7.81 72 7.9 x 103 9.1 x 104 292 64 2.6

12THLEJ100 100 63 388 5.74 85 2 x 104 1.4 x 105 292 64 2.6

12AILSJ100* 100 31.5 176 53 70 1.4 x 104 2 x 105 292 76 3.3

12TKLEJ125 125 63 687 3.99 93 4 x 104 3.5 x 105 292 76 3.5

12TXLEJ160** 160 63 560 4.3 217 1.1 x 105 5 x 105 292 88 3.7

12TXLEJ200** 200 63 610 3.8 333 1.5 x 105 6.5 x 105 292 88 3.7

12THMEJ100 100 63 272 5.74 85 2 x 104 1.4 x 105 442 64 3.7

12TFMSJ160 160 50 485 3.65 139 5 x 104 3.5 x 105 442 76 5.1

A 3 4

26 Max striker travel after operation

Ø C MA X

Ø 45

Ø D

A 3 4

30 Striker travel after operation

Ø 8 Ø C MA X

Ø 4 5

Ø D

EJ Fuses

SJ Fuses

* Not suitable for outdoor use / ** Not compliant with VDE 0670 part 402.

18 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

17.5 kV - ‘A’ and ‘T’ Range current limiting back-up range fuse links

Specifications

Description

A range of medium voltage DIN Fuse links, complete with

sealed striker, suitable for transformer protection. The fuse

links can be used even when there is no secondary low voltage

protection, provided they are used with fuse switches fitted

with instantaneous striker tripping.

Ratings

Voltage: 10 - 17.5 kV

Current: 6.3 - 125 A

Breaking capacity: 20 - 50 kA

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE 0670

part 4, VDE 0670 part 402 and with IEC 60282-1 (2005).

‘A’ range is suitable for indoor use.

‘T’ range is suitable for indoor and outdoor use.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our high voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Primary side transformer protection

• Used in fuse switch combination unit

• Used in fuse bases

• Used in fuse switches.

A 3 4

26 Max striker travel after operation

Ø C MA X

Ø 45

Ø D

A 3 4

30 Striker travel after operation

Ø 8 Ø C MA X

Ø 4 5

Ø D

EJ Fuses

SJ Fuses

Dimensions - mm

Fuse reference A C D Weight (Kg)

AILSJ 442 79 76 4.5

TDLSJ 292 54 51 1.7

TFLSJ 292 80 76 3.1

TDMEJ 442 54 51 2.5

THMEJ 442 67 64 3.7

TKMEJ 442 80 76 5.1

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2t)

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

17.5AILSJ40* 100 25 176 7.33 102 1.4 x 104 2 x 105 442 76 4.5

17.5AILSJ50* 50 20 137 29.5 102 1.8 x 103 2.9 x 104 442 76 4.5

17.5AILSJ63* 63 20 125 23.6 130 3.2 x 103 4.5 x 104 442 76 4.5

17.5TDLSJ6.3* 6.3 35.5 23 313 15 4.8 x 101 6.1 x 102 292 51 1.7

17.5TDLSJ10* 10 35.5 19 185 23 2.8 x 102 4 x 103 292 51 1.7

17.5TDLSJ16* 16 35.5 59 104 34 2.9 x 102 2 x 103 292 51 1.7

17.5TDLSJ20* 20 35.5 80 69.2 38 5.7 x 102 4.4 x 103 292 51 1.7

17.5TDLSJ25* 25 35.5 100 55.4 48 8.9 x 102 6.6 x 103 292 51 1.7

17.5TDLSJ31.5* 31.5 35.5 118 41.4 58 5.1 x 102 1.1 x 104 292 51 1.7

17.5TDLSJ40* 40 35.5 148 31.1 76 8 x 102 1.8 x 104 292 51 1.7

17.5TFLSJ50* 50 35.5 225 17.3 62 8.1 x 103 6 x 104 292 76 3.1

17.5TDMEJ6.3 6.3 50 25 324 14 9.8 x 101 1 x 103 442 51 2.5

17.5TDMEJ10 10 50 36 192 24 2.8 x 102 2.3 x 103 442 51 2.5

17.5TDMEJ16 16 50 55 79.6 23 2.6 X 102 3.9 x 103 442 51 2.5

17.5TDMEJ20 20 50 69 57 27 5.2 x 102 5.4 x 103 442 51 2.5

17.5TDMEJ25 25 50 87 45.5 34 8.1 x 102 8.4 x 103 442 51 2.5

17.5TDMEJ31.5 31.5 50 87 34.1 41 1.4 x 103 1.5 x 104 442 51 2.5

17.5TDMEJ40 40 50 111 25 53 2.4 x 103 2.5 x 104 442 51 2.5

17.5TDMEJ50 50 50 174 19.7 69 2.8 x 103 3.1 x 104 442 51 2.5

17.5TDMEJ63 63 50 200 15.4 89 4.3 x 103 4.7 x 104 442 51 2.5

17.5THMEJ80 80 50 270 11.5 108 7.9 x 103 9.1 x 104 442 64 3.7

17.5THMEJ100 100 50 376 8.38 127 2 x 104 1.4 x 105 442 64 3.7

17.5TKMEJ125 125 50 467 5.95 146 3.4 x 104 3.5 x 105 442 76 5.1

* Not suitable for outdoor use.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 19

Dimensions - mm

Fuse reference A C D Weight (Kg)

FDMSJ 442 54 51 2.2

FFMSJ 442 67 76 4.5

24 kV - ‘F’ Range current limiting full range fuse links

Description

A range of medium voltage DIN Fuse links, complete with

sealed striker, suitable for transformer protection. Eaton’s ‘F’

range provide Full range protection.

Ratings

Voltage: 24 kV

Current: 6.3 - 45 A

Breaking capacity: 35.5 kA

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE

0670 part 4, VDE 0670 part 402 and with IEC 60282-1 (2005).

Suitable for indoor use.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our high voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

• Our full range of MV Fuse links can interrupt any current

below the rated breaking capacity.

Typical applications

• Primary side transformer protection.

• Used in fuse switch combination unit.

• Used in fuse bases without instantaneous striker tripping.

• Used in fuse switches.

Specifications

A 3 4

30 Striker travel after operation.

Ø8

Ø C MAX

Ø 4 5

ØD

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

24FDMSJ6.3 6.3 35.5 6.3 437 21 6.8 x 101 5.4 x 102 442 51 2.2

24FDMSJ10 10 35.5 10 218 29 2.7 x 102 2.1 x 103 442 51 2.2

24FDMSJ16 16 35.5 16 118 39 8.2 x 102 2.7 x 103 442 51 2.2

24FDMSJ20 20 35.5 20 82.2 43 1.6 x 103 5.1 x 103 442 51 2.2

24FDMSJ25 25 35.5 25 54.7 48 3.4 x 103 1.2 x 104 442 51 2.2

24FDMSJ31.5 31.5 35.5 31.5 48.6 71 3.2 x 103 1.2 x 104 442 51 2.2

24FFMSJ25 25 35.5 25 58.6 47 3.4 x 103 1.1 x 104 442 76.2 4.5

24FFMSJ31.5 31.5 35.5 31.5 48.8 70 4.7 x 103 1.5 x 104 442 76.2 4.5

24FFMSJ40 40 35.5 40 38.4 85 7.6 x 103 2.5 x 104 442 76.2 4.5

24FFMSJ45 45 35.5 45 31.4 92 7.2 x 103 3 x 104 442 76.2 4.5

20 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

24 kV - ‘A’ and ‘T’ Range current limiting back-up fuse links

Description

A range of medium voltage DIN Fuse links, complete with

sealed striker, suitable for transformer protection. The fuse

links can be used even when there is no secondary low voltage

protection, provided they are used with fuse switches fitted

with instantaneous striker tripping.

Ratings

Voltage: 12 - 24 kV

Current: 6.3 - 160 A

Breaking capacity: 20 - 63 kA

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE 0670

part 4, VDE 0670 part 402 and with IEC 60282-1 (2005).

‘A’ range is suitable for indoor use.

‘T’ range is suitable for indoor and outdoor use.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Primary side transformer protection.

• Used in fuse switch combination unit.

• Used in fuse bases.

• Used in fuse switches.

Specifications

A 3 4

30 Striker travel after operation.

Ø88

Ø C MAX

Ø 45

ØD

Dimensions - mm

Fuse reference A C D Weight (Kg)

AFMSJ 442 79 76 4.5

AIMSJ 442 79 76 4.5

TDMEJ 442 54 51 2.5

THMEJ 442 67 64 3.7

TFMEJ 442 80 76 5.1

TXMEJ 442 91 88 5.9

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

24AFMSJ50 50 20 137 29.5 102 1.8 x 103 2.9 x 104 442 76 4.5

24AFMSJ63 63 20 125 23.6 130 3.2 x 103 4.5 x 104 442 76 4.5

24AIMSJ71 71 20 176 15.1 106 6.3 x 103 8.5 x 104 442 76 4.5

24TDMEJ6.3 6.3 50 23 444 20 9.8 x 101 1 x 103 442 51 2.5

24TDMEJ10 10 50 34 262 32 2.8 x 102 2.3 x 103 442 51 2.5

24TDMEJ16 16 50 56 109 34 2.6 x 102 3.9 x 103 442 51 2.5

24TDMEJ20 20 50 73 78.2 38 5.2 x 102 5.4 x 103 442 51 2.5

24TDMEJ25 25 50 92 62.4 49 8.1 x 102 8.4 x 103 442 51 2.5

24TDMEJ31.5 31.5 50 92 46.8 59 1.4 x 103 1.5 x 104 442 51 2.5

24TDMEJ40 40 50 118 34.3 79 2.4 x 103 2.5 x 104 442 51 2.5

24TDMEJ50 50 50 185 27 98 2.8 x 103 3.1 x 104 442 51 2.5

24THMEJ63 63 50 217 21.1 127 4.3 x 103 4.7 x 104 442 64 3.7

24TFMEJ80 80 50 265 15.7 153 7.9 x 103 9.1 x 104 442 76 5.1

24TFMEJ100* 100 63 430 18 400 2.8 x 104 9.4 x 104 442 76 5.1

24TXMEJ125* 125 40 760 11 340 9.7 x 104 3.5 x 105 442 88 5.9

24TXMEJ160* 160 31.5 900 9.60 515 1.3 x 105 5 x 105 442 88 5.9

* Not compliant with VDE 0670 part 402.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 21

36 kV - ‘T’ Range current limiting back-up fuse links

Specifications

Description

A range of medium voltage DIN Fuse links, complete with

sealed striker, suitable for transformer protection. The fuse

links can be used even when there is no secondary low voltage

protection, provided they are used with fuse switches fitted

with instantaneous striker tripping.

Ratings

Voltage: 18 - 36 kV

Current: 3.15 - 63 A

Breaking capacity: 20 - 35.5 kA

Agency information

Comply with DIN Dimensional standard DIN 43625, VDE

0670 part 4, VDE 0670 part 402 and with IEC 60282-1 (2005).

Suitable for indoor and outdoor use.

Time-current curves and cut-off curves

See list page 104

features and benefits

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Primary side transformer protection.

• Used in fuse switch combination unit.

• Used in fuse bases.

• Used in fuse switches.

A 3 4

30 Striker travel after operation.

Ø8 Ø C MAX

Ø 4 5

Ø D

EJ Fuses

A 34

26 Max striker travel after operation.

Ø C MAX

Ø 4 5

ØD

SJ Fuses

Dimensions - mm

Fuse reference A C D Weight (Kg)

TDQSJ 537 54 51 2.9

TFQSJ 537 80 76 6

TXQEJ 537 88 88 6.5

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

36TDQSJ3.15 3.15 20 23 1455 18 2 x 101 2.4 x 102 537 51 2.9

36TDQSJ6.3 6.3 35.5 23 684 34 1 x 102 1.2 x 103 537 51 2.9

36TDQSJ10 10 35.5 35 402 44 3.1 x 102 3.6 x 103 537 51 2.9

36TDQSJ16 16 35.5 70 165 52 4.6 x 102 5.1 x 103 537 51 2.9

36TDQSJ20 20 35.5 98 117 62 8.9 x 102 8.2 x 104 537 51 2.9

36TDQSJ25 25 35.5 112 98 85 1.2 x 103 1.5 x 104 537 51 2.9

36TFQSJ31.5 31.5 35.5 116 73.4 96 2.1 x 103 2.3 x 104 537 51 6

36TFQSJ40 40 35.5 178 52.4 116 4.1 x 103 3.9 x 104 537 76 6

36TFQSJ50 50 35.5 255 36.8 133 8.3 x 103 8.1 x 104 537 76 6

36TXQEJ63* 63 20 360 35 271 1.1 x 104 6.2 x 104 537 88 6.5

* Not compliant with VDE 0670 part 402.

22 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

Striker force diagrams

E = Spring striker 80N to DIN IEC 60282-1 Designation ‘Medium’

Force (N) 20

0 4 8 12 16

Travel (mm)

Force x Travel diagram for 50N DIN striker

20 24 28 32

S = Spring striker 50N to DIN 43625 and IEC 60282-1 Designation ‘Medium’

100

Force (N)

0 4 8 12 16

Travel (mm)

Force x Travel diagram for 80N DIN striker

20 24 28 32 36

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 23

Medium voltage motor fuse links

Introduction to motor fuse links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

British standard

3.6 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.2 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

12 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

DIN

3.6 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.2 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

USA

2.75 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.5 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

24 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

Introduction to medium voltage motor fuse links

• Motor fuse Links comply with IEC 60282-1, IEC 644 and

BS 5907.

• Available in DIN 43625 and BS 2692 dimensions.

• Sold in a wide range of ratings from:

• 3.6 kV - 5 to 450 A

• 7.2 kV - 5 to 355 A

• North American dimensioned products also available, 2R to

24R ratings.

Eaton’s Bussmann series motor fuse links

Eaton’s Bussmann series motor fuse links are designed

to meet the specific requirements necessary for motor

protection. During the starting cycle of direct on-line motors,

the fuse elements will reach a considerably higher temperature

than during normal operation; this is due to the high amount

of current the motor will draw as it starts, typically, 6 times

its normal load current value. This results in expansion and

contraction of the fuse elements and could cause premature

operation of the fuse link. Eaton’s Bussmann series motor fuse

links encompass an advanced design to minimise this effect.

This therefore, negates the need to over specify the fuse rating

due to high values of motor starting current.

Eaton’s Bussmann series fuse links operate extremely quickly

under heavy fault currents, resulting from the time-current

characteristic. Low power dissipation ensures low temperature

rise, important in multi-tier starters for example. Switching (Arc)

voltages are lower than permitted values, therefore, 5.5 kV fuse

links are also suitable for 4.8 kV and 2.4 kV circuits.

Application

Fuse links provide short-circuit protection in motor circuits

to both the motor starter and cables from the starter to the

motor. Overload protection is provided by the motor starter,

generally by an overload relay and contactor. Combination

striker tripping may also form part of the associated

equipment which houses the fuse links and motor starters.

Application procedure

For any motor the fuse current rating is determined by

magnitude and duration of starting current, except in a few

situations where the starting currents are very light.

Direct-on-line starting

In the absence of specific information, the starting current can

usually be taken to be six times the motor’s full load current.

The starting time will depend on the type of the drive but will

be approximately as follows:

• Pump motors - 6 seconds

• Mill motors - 10 to 15 seconds

• Fan motors - 60 seconds

These are average values and the appropriate figures for

starting current and starting time for actual installation should

be obtained wherever possible.

Multiply the starting current by 1.7 and using this value of

current and the starting time, (it is recommended that a

minimum time of five seconds be adopted), plot this point on

the time-current characteristics of the fuse link. The correct

current rating of the fuse link is then chosen as being the one

immediately to the right of the point plotted. The chosen fuse

link must also have a current rating of at least 1.3 times the full

load current of the associated motor.

The rating chosen will be adequate for normal applications

where the associated motor is not started more than twice in a

given period of one hour.

For applications using more frequent starting duties, a greater

derating factor must be applied as shown below:

• Maximum 2 starts per hour - Derating factor 1.7

• Maximum 4 starts per hour - Derating factor 1.9

• Maximum 8 starts per hour - Derating factor 2.1

• Maximum 16 starts per hour - Derating factor 2.4

Assisted starting

A similar method of fuse selection may be used as for

direct-online starting (see above), but it must be noted that

the normal running current of the motor is likely to be closer

in value to the nominal current rating of the fuse link than for

direct-on-line applications.

The rating of fuse link chosen will need to be appreciably

greater than the motor running current to allow for restricted

cooling inside control gear cubicles, particularly where multitier starters are involved. For further guidance please contact

Eaton’s application engineers: buletechnical@eaton.com.

Notes

For applications involving more frequent starting duties than

16 times per hour or where unusual duty cycles are involved,

consult Eaton’s application engineers for advice:

buletechnical@eaton.com or 00 44 (0) 1509 882 699.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 25

3.6 kV - Motor fuse links to British standard dimensions

Description

Motor fuse links providing short circuit protection in motor

circuits to both the motor starter and cables from the starter

to the motor.

Ratings

Voltage: 3.6 kV

Current: 5 - 450 A

Breaking capacity: 50 kA

Agency information

BS 2692-1

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect.

• Silver elements ensuring high conductivity and low power

(revenue) loss

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained

• Allows motor start current to pass on without degradation

of fuse link

Typical applications

• Motor protection

Dimensions - mm

Tag type ‘6’ - BS 2692 Standard

Fuse link Type A B C D E F G H J

+WJON6 257 235 192 36 9.5 13 25 23 2.4

WDO*H6 261 235 192 51 10.5 13 25 29 2.6

WFO*H6 261 235 192 76 10.5 20 64 42 2.6

Tag type ‘O’ - BS 2692 Standard

Fuse link Type A B C D

WDFHO 337 305 254 51

WFFHO 337 305 254 76

WKFHO 337 305 254 76

WFGHO 442 410 359 76

WKGHO 442 410 359 76

Triple barrel fuse link (3rd barrel shown dotted) with 03 tags.

Double barrel fuse link with 02 tags shown in full line.

Tag type ‘6’

Ø D

Fuse type: WJO

Ø D

Fuse type: WDO, WFO

min 10 to max 16mm travel after operation

Tag type ‘0’

ØD

38 11 24

Ø11 89

257

169

3,2

ØD

38 11 24

Ø 11

2,7

PLQWRPD[PPWUDYHODIWHURSHUDWLRQ

min 10 to max 16mm travel after operation

Specifications

26 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

Part numbers and technical data

Higher ratings than those listed above can be obtained by using fuse links connected in parralel. Special fixing arrangements for connecting up to three fuse links in parallel

are available. Please contact Eaton’s application engineers buletechnical@eaton.com for more details. The code designations for these arrangements are given in “How to

order” page 8.

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

Tag type ‘6’ - BS 2692 Standard

3.6WJON65 5 50 13 148 5 2 x 101 1.6 x 103 192 35 0.54

3.6WJON66.3 6.3 50 24 56.3 8 1.6 x 102 1.3 x 103 192 35 0.54

3.6WJON610 10 50 24 56.3 8 1.6 x 102 1.3 x 103 192 35 0.54

3.6WJON616 16 50 56 33.1 12 1.7 x 102 1.4 x 103 192 35 0.54

3.6WJON620 20 50 56 22.1 12 3.9 x 102 3.2 x 103 192 35 0.54

3.6WJON625 25 50 70 17.7 15 6.1 x 102 4.9 x 103 192 35 0.54

3.6WJON631.5 31.5 50 112 10.1 14 1.2 x 103 9.8 x 103 192 35 0.54

3.6WJON640 40 50 112 7.54 17 2.1 x 103 1.7 x 104 192 35 0.54

3.6WJON650 50 50 140 63 21 3.2 x 103 2.6 x 104 192 35 0.54

3.6WDOH650 50 50 180 5.36 20 1.8 x 103 2.4 x 104 192 51 1.1

3.6WDOH663 63 50 225 3.68 21 3.8 x 103 4.5 x 104 192 51 1.1

3.6WDOH680 80 50 288 2.88 27 6.3 x 103 8 x 104 192 51 1.1

3.6WDOH6100 100 50 360 2.16 31 9.8 x 103 1.1 x 105 192 51 1.1

3.6WDOH6125 125 50 450 1.73 39 1.5 x 104 2.2 x 105 192 51 1.1

3.6WFOH6160 160 50 600 1.28 47 3.1 x 104 6.2 x 105 192 76 2.1

3.6WFOH6200 200 50 600 0.94 52 5.7 x 104 1.1 x 106 192 76 2.1

Tag type ‘O’ - BS 2692 Standard

3.6WDFHO50 50 50 152 6.61 21 1.8 x 103 2.4 x 104 254 51 1.46

3.6WDFHO63 63 50 171 53 28 3.1 x 103 4.5 x 104 254 51 1.46

3.6WDFHO80 80 50 190 3.52 31 6.3 x 103 8 x 104 254 51 1.46

3.6WDFHO100 100 50 190 2.87 39 9.5 x 103 1.2 x 105 254 51 1.46

3.6WDFHO125 125 50 190 2.44 53 1.3 x 104 1.8 x 105 254 51 1.46

3.6WFFHO160 160 50 300 1.53 54 3.4 x 104 4.1 x 105 254 76 3.2

3.6WFFHO200 200 50 300 1.24 67 5.1 x 104 7.2 x 105 254 76 3.2

3.6WKFHO250 250 50 520 0.65 57 1.8 x 105 2.4 x 106 254 76 3.2

3.6WKFHO315 315 50 650 0.44 60 4.1 x 105 5 x 106 254 76 3.2

3.6WKFHO355 355 50 820 0.35 59 6.4 x 105 7 x 106 254 76 3.2

3.6WKFHO400 400 50 820 0.35 76 6.4 x 105 7 x 106 254 76 3.2

3.6WKFGHO31.5 31.5 50 151 18.4 25 4.5 x 102 6 x 103 359 76 4.1

3.6WFGHO40 40 50 151 13.9 31 8 x 102 1.2 x 104 359 76 4.1

3.6WFGHO50 50 50 151 9.24 32 1.8 x 103 2.2 x 104 359 76 4.1

3.6WFGHO63 63 50 151 6.93 38 3.2 x 103 4.5 x 104 359 76 4.1

3.6WFGHO80 80 50 170 5.47 48 5.1 x 103 7.5 x 104 359 76 4.1

3.6WFGHO100 100 50 212 4.40 62 7.9 x 103 1.2 x 105 359 76 4.1

3.6WFGHO125 125 50 212 3.60 79 1.2 x 104 1.7 x 105 359 76 4.1

3.6WFGHO160 160 50 300 2.16 75 3.4 x 104 4.2 x 105 359 76 4.1

3.6WFGHO200 200 50 300 1.77 95 5.1 x 104 7 x 105 359 76 4.1

3.6WFGHO250 250 50 500 1.13 96 1.3 x 105 1.9 x 106 359 76 4.1

3.6WKGHO315 315 50 852 0.65 89 4.5 x 105 6 x 106 359 76 3.9

3.6WKGHO355 355 50 852 0.51 90 6.4 x 105 8.5 x 106 359 76 3.9

3.6WKGHO400 400 50 960 0.45 100 8.2 x 105 1.1 x 107 359 76 3.9

3.6WKGHO450 450 50 1150 0.38 108 1.2 x 106 1.5 x 107 359 76 3.9

3.6 kV - Motor fuse links to British standard dimensions

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 27

7.2 kV - Motor fuse links to British standard dimensions

Description

Motor fuse links providing short circuit protection in motor

circuits to both the motor starter and cables from the starter

to the motor.

Ratings

Voltage: 7.2 kV

Current: 25 - 315 A

Breaking capacity: 40 kA

Agency information

Comply with BS 2692-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

• Allows motor start current to pass on without degradation

of fuse link.

Typical applications

• Motor protection.

Specifications

2 .7

1 1 24 Ø 11

Ø D

89 4 2

3. 2

169 2 5 7

11 24 Ø 1 1

3 2

3 8

Ø D

7 6

PLQWRPD[PPWUDYHODIWHURSHUDWLRQ

min 10 to max 16mm travel after operation

Triple barrel fuse link (3rd barrel shown dotted) with 03 tags.

Double barrel fuse link with 02 tags shown in full line.

Dimensions - mm

Fuse link Type A B C D

WFNHO 486 454 403 76

WKNHO 486 454 403 76

Part numbers and technical data

Higher ratings than those listed above can be obtained by using fuse links connected in parralel. Special fixing arrangements for connecting up to three fuse links in parallel are available. Please contact

Eaton’s application engineers buletechnical@eaton.com for more details. The code designations for these arrangements are given in “How to order” page 8.

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

7.2WFNHO25 25 40 84 38.7 34 1.4 x 102 2.1 x 103 403 76 4.4

7.2WFNHO31.5 31.5 40 96 25.5 35 3.1 x 102 4.7 x 103 403 76 4.4

7.2WFNHO40 40 40 107 18.2 40 6.1 x 102 8 x 103 403 76 4.4

7.2WFNHO50 50 40 122 13.3 46 1.2 x 103 1.5 x 104 403 76 4.4

7.2WFNHO63 63 40 133 10.4 56 1.9 x 103 3 x 104 403 76 4.4

7.2WFNHO80 80 40 133 7.30 65 3.8 x 103 5.8 x 104 403 76 4.4

7.2WFNHO100 100 40 262 4.92 69 9.8 x 103 1.3 x 105 403 76 4.4

7.2WFNHO125 125 40 300 2.94 63 2.4 x 104 2.4 x 105 403 76 4.4

7.2WFNHO160 160 40 337 25 72 5 x 104 7 x 105 403 76 4.4

7.2WKNHO200 200 40 500 1.63 90 8.8 x 104 1.3 x 106 403 76 4.4

7.2WKNHO224 224 40 500 1.44 98 1.1 x 105 1.6 x 106 403 76 4.4

7.2WKNHO250 250 40 960 1.11 105 2.2 x 105 1.6 x 106 403 76 4.4

7.2WKNHO315 315 40 960 0.78 107 4.5 x 105 3.1 x 106 403 76 4.4

28 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

12 kV - Motor fuse links to British standard dimensions

Specifications

Description

Motor fuse links providing short circuit protection in motor

circuits to both the motor starter and cables from the starter

to the motor.

Ratings

Voltage: 12 kV

Current: 250 - 350 A

Breaking capacity: 56 kA

Agency information

Comply with BS 2692-1

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

• Allows motor start current to pass on without degradation

of fuse link.

Typical applications

• Motor protection

* Lower ratings available 32, 40, 50, 63, 75, 100, 125, 160 and 200 A. Please contact our technical department for further information: buletechnical@eaton.com or 00 44 1509 882 699.

Dimensions - mm

915.0

23.0

41.0

3.15 MAX

11.0

Ø82.0

38.0

2 HOLES Ø11.0

16.0 MAX

883.0

832.0

63.0

32.0

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum breaking

current

I3 (A)

Minimum

pre-arcing 103

Maximum

operating

103

K81ERX250 250 56 kA 1000 300 2000

K81ERX315 315 56 kA 1000 540 3100

K81ERX350 350 56 kA 1000 850 4500

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 29

3.6 kV - Motor fuse links to DIN Standard dimensions

Description

Motor fuse links providing short circuit protection in motor

circuits to both the motor starter and cables from the starter

to the motor.

Ratings

Voltage: 3.6 kV

Current: 50 - 400 A

Breaking capacity: 50 kA

Agency information

Comply with IEC 60282-1, VDE 0670 part 4 and DIN

Dimensional standard DIN 43625.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

• Allows motor start current to pass on without degradation

of fuse link.

Typical applications

• Motor protection.

Part numbers and technical data

Specifications

A 3 4

26mm maximum travel after operation

Ø 45

Ø D Dimensions - mm

Fuse link reference Length (A) mm Diameter (D) mm Weight Kg

WDOS 192 51 1.1

WFOS 192 76 2.1

WDLS 292 51 1.63

WFLS 292 76 3.16

WKLS 292 76 3.16

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

3.6WDOSJ50 50 50 180 5.36 20 1.8 x 103 2.4 x 104 192 51 1.1

3.6WDOSJ63 63 50 225 3.68 21 3.8 x 103 4.5 x 104 192 51 1.1

3.6WDOSJ80 80 50 288 2.88 27 6.3 x 103 8 x 104 192 51 1.1

3.6WDOSJ100 100 50 360 2.16 31 9.8 x 103 1.1 x 105 192 51 1.1

3.6WDOSJ125 125 50 450 1.73 39 1.5 x 104 2.2 x 105 192 51 1.1

3.6WFOSJ160 160 50 600 1.28 47 3.1 x 104 6.2 x 105 192 76 2.1

3.6WFOSJ200 200 50 600 0.94 52 5.7 x 104 1.1 x 106 192 76 2.1

3.6WDLSJ50 50 50 152 7.73 27 1.8 x 103 2.4 x 104 292 51 1.63

3.6WDLSJ63 63 50 171 5.9 32 3.1 x 103 4.5 x 104 292 51 1.63

3.6WDLSJ80 80 50 190 4.12 37 6.3 x 103 8 x 104 292 51 1.63

3.6WDLSJ100 100 50 190 3.38 46 9.5 x 103 1.2 x 105 292 51 1.63

3.6WDLSJ125 125 50 190 2.85 61 1.3 x 104 1.8 x 105 292 51 1.63

3.6WFLSJ160 160 50 300 1.74 61 3.4 x 104 4.1 x 105 292 76 3.16

3.6WFLSJ200 200 50 300 1.42 80 5.1 x 104 7.2 x 105 292 76 3.16

3.6WKLSJ250 250 50 820 0.74 67 1.9 x 105 2.4 x 106 292 76 3.16

3.6WKLSJ315 315 50 820 0.51 69 4 x 105 5 x 106 292 76 3.16

3.6WKLSJ400 400 50 820 0.40 90 6.4 x 105 7 x 106 292 76 3.16

30 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

7.2 kV - Motor fuse links to DIN Standard dimensions

Specifications

Typical applications

• Motor protection.

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

7.2WFMSJ25 25 63 84 33.9 33 1.4 x 102 2.1 x 103 442 76 5.2

7.2WFMSJ31.5 31.5 63 96 25.4 40 3.1 x 102 4.7 x 103 442 76 5.2

7.2WFMSJ40 40 63 107 17.8 56 6.1 x 102 8 x 103 442 76 5.2

7.2WFMSJ50 50 63 122 14.8 53 1.2 x 103 1.5 x 104 442 76 5.2

7.2WFMSJ63 63 63 133 11.6 61 1.9 x 103 3 x 104 442 76 5.2

7.2WFMSJ80 80 63 133 8.12 72 3.8 x 103 5.8 x 104 442 76 5.2

7.2WFMSJ100 100 63 262 5.33 74 9.8 x 103 1.3 x 105 442 76 5.2

7.2WFMSJ125 125 63 300 3.19 70 2.4 x 104 2.4 x 105 442 76 5.2

7.2WFMSJ160 160 63 337 2.23 79 5 x 104 7 x 105 442 76 5.2

7.2WKMSJ200 200 63 500 1.79 99 8.8 x 104 1.3 x 106 442 76 5.2

7.2WKMSJ224 224 63 500 1.59 100 1.1 x 105 1.6 x 106 442 76 5.2

7.2WKMSJ250 250 63 960 1.23 107 2.2 x 105 1.6 x 106 442 76 5.2

7.2WKMSJ315 315 63 960 0.87 120 4.5 x 105 3.1 x 106 442 76 5.2

7.2WKMSJ355 355 63 1000 0.72 125 6.4 x 105 3.9 x 106 442 76 5.2

Description

Motor fuse links providing short circuit protection in motor

circuits to both the motor starter and cables from the starter

to the motor.

Ratings

Voltage: 7.2 kV

Current: 25 - 355A

Breaking capacity: 63 kA

Agency information

Comply with IEC 60282-1,VDE 0670 part 4 and DIN

Dimensional standard DIN 43625.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

• Allows motor start current to pass on without degradation

of fuse link.

Dimensions - mm

Fuse link reference Length (A) mm Diameter (D) mm Weight Kg

WFMS 442 76 5.2

WKMS 442 76 5.2

A 34

26mm maximum travel after operation

Ø 45

Ø D

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 31

Specifications

Dimensions - mm

Fuse link reference Length (A) mm Diameter (D) mm Weight Kg

VFRHA 276 76 2.5

VKRHA 276 76 2.5

VKRHK 276 76 5.2

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

2.75VFRHA2R 60 180 6.15 6.15 52 8.1 x 103 2.8 x 104 276 76 2.5

2.75VFRHA3R 60 229 44 44 57 1.9 x 104 7.5 x 104 276 76 2.5

2.75VFRHA4R 60 257 2.69 2.69 62 4.2 x 104 1.4 x 105 276 76 2.5

2.75VFRHA6R 60 525 1.62 1.62 65 3.9 x 104 3.4 x 105 276 76 2.5

2.75VKRHA9R 60 500 1.15 1.15 70 8.8 x 104 8.4 x 105 276 76 2.5

2.75VKRHA12R 60 500 13 13 80 1.1 x 105 1.2 x 106 276 76 2.5

2.75VKRHK18R 60 500 0.58 0.58 140 3.5 x 105 3.2 x 106 276 76 5.2

2.75VKRHK24R 60 500 0.51 0.51 156 4.5 x 105 5.5 x 106 276 76 5.2

2.75 kV - Motor fuse links to USA Dimensions

Description

R-rated medium voltage current limiting fuse links for motor

protection.

Ratings

Voltage: 2.75 kV

Current: 2 - 24 R

Breaking capacity: 60 kA

Agency information

IEEE standards.

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

• Allows motor start current to pass on without degradation

of fuse link.

Typical applications

• Motor protection.

Ø 80 Max

Ø 7 6

Ø 8 5

1 60

A Tags (ferrule)

K Tags (double barrel fuse links)

0LQ0D[VWULNHUWUDYHODIWHURSHUDWLRQLI΋WWHG

32 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

5.5 kV - Motor fuse links to USA Dimensions

Specifications

Description

R-rated medium voltage current limiting fuse links for motor

protection.

Ratings

Voltage: 5.5 kV

Current: 2 - 24 R

Breaking capacity: 60 kA

Agency information

IEEE standards.

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Motor protection.

Dimensions - mm

Fuse link reference Length mm Diameter mm Weight Kg

VFNHA 403 76 3.8

VKNHA 403 76 3.8

VKNHK 403 76 7.8

7 6

Ø 80 M a x

Ø 76

Ø 85

160

A Tags (ferrule)

K Tags (double barrel fuse links)

0LQ0D[VWULNHUWUDYHODIWHURSHUDWLRQLI΋WWHG

Part numbers and technical data

Cold resistance &

watts loss in free air Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Minimum

breaking

current

I3 (A) mΩ W

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

5.5VFNHA2R 60 180 180 8.35 70 8.1 x 103 2.8 x 104 403 76 3.8

5.5VFNHA3R 60 229 229 5.48 77 1.9 x 104 7.9 x 104 403 76 3.8

5.5VFNHA4R 60 257 257 3.65 85 4.2 x 104 1.6 x 105 403 76 3.8

5.5VFNHA6R 60 525 525 2.31 91 3.9 x 104 3.6 x 105 403 76 3.8

5.5VKNHA9R 60 500 500 1.63 99 8.8 x 104 8.8 x 105 403 76 3.8

5.5VKNHA12R 60 500 500 1.45 110 1.1 x 105 1.3 x 106 403 76 3.8

5.5VKNHK18R 60 500 500 0.82 198 3.5 x 105 3.4 x 106 403 76 7.8

5.5VKNHK24R 60 500 500 0.73 220 4.5 x 105 5.8 x 106 403 76 7.8

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 33

Medium voltage and auxiliary transformer fuse links

Introduction to medium voltage and auxiliary transformer fuse links 34

Medium voltage and auxiliary transfomer

1.1 kV 35

3.6 kV 36

5.5 kV - Type E 37

7.2 kV 38

12 kV 39

15.5 kV 40

17.5 kV 41

24 kV 42

36 kV 43

Type CAV

3.6 kV 44

5.5 kV 45

7.2 kV 46

12 kV 47

15.5 kV 48

17.5 kV 49

24 kV 50

36 kV 51

38 kV 52

34 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

Introduction to medium voltage and auxiliary transformer fuse links

• British standard voltage and auxiliary transformer (VT)

fuse links.

• A range of voltage transformer primary fuse links to BS

2692-1 and IEC 60282-1.

• Wide range of ratings from 1 kV to 36 kV.

• 3.15 Amp industry standard current ratings.

• CAV range with ratings from 3.6 kV to 38 kV.

Eaton’s Bussmann series voltage and auxiliary

transformer fuse links

Eaton manufactures a wide range of voltage transformer (VT)

fuse links. In North America they are referred to as ‘potential

transformer fuse links’. These fuse links are designed for

use in the primary side of voltage transformers to provide

system isolation in the event of faults occuring in the

transformer circuit.

Voltage transformer fuse links have a preferred current rating

of 3.15A. Experience has shown that there is a risk of spurious

operation by transient overcurrents where lower current

ratings are used. In addition, in order to minimise the risk of

deterioration of the fine fuse elements caused by corona, it is

desirable to mount the fuse links so that the earthed metal is

not in the immediate vicinity of the part of the barrel between

the ferrules.

Higher current and ‘E’ ratings are available for special

applications, including auxiliary transformers.

A range of VT fuse links with a breaking capacity of 200 kA for

use at the output terminals of large turbo alternators can also

be ordered. For further information, please contact Eaton’s

application engineers: buletechnical@eaton.com.

Types prefixed ‘A’ or ‘N’ are suitable for use indoors in air only.

Types prefixed ‘O’ may be used under oil.

Application

Small rated fuse links for protection of voltage and auxiliary

transformers. Back-up protection up to 3.15 A and voltages

from 1.1 kV to 36 kV.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 35

1.1 kV - Voltage and auxiliary transformer fuse links

Specifications

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking capacity

I1 (kA)

Cold resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

1.1NBUN*2 2 50 0.15 6.3 x 100 1.8 x 101 86 25.4 0.12

1.1NBUN*3.15 3.15 50 0.11 1.2 x 101 3.4 x 101 86 25.4 0.12

1.1NBUN*6.3 6.3 50 0.07 3.2 x 101 9.2 x 101 86 25.4 0.12

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 1.1 kV

Current: 2 - 6.3 A

Breaking capacity: 50 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 1 9

Ø 1 9

Ø D

1, 6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

Dimensions - mm

Fuse link reference Length (A) mm Diameter (D) mm Weight Kg

NBUN 86 17.5 25.4

36 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

3.6 kV - Voltage and auxiliary transformer fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 3.6 kV

Current: 3.15 - 10A

Breaking capacity: 50 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 1 9

Ø 1 9

Ø D

1 ,6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

ABWN 142 30 25.4

ABCN 195 30 25.4

Part numbers and technical data

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

3.6ABWN*3.15 3.15 50 0.36 6.3 x 100 1.8 x 101 142 25.4 0.19

3.6ABWN*6.3 6.3 50 0.12 4.8 x 101 3.1 x 102 142 25.4 0.19

3.6ABCN*3.15 3.15 50 0.36 6.3 x 100 1.8 x 101 195 25.4 0.245

3.6ABCN*6.3 6.3 50 0.12 4.8 x 101 3.1 x 102 195 25.4 0.245

3.6ABCN*10 10 50 0.08 1.1 x 102 7 x 102 195 25.4 0.245

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 37

5.5 kV - Type E Voltage transformer fuse links

Specifications

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

ABWNA 142 30 25.4

AMWNA 142 16 20.6

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

5.5AMWNA0.5E 0.5 50 32.5 1.2 x 100 3.5 x 100 142 20.6 0.114

5.5AMWNA1E 1 50 16 5 x 100 1.4 x 101 142 20.6 0.114

5.5AMWNA2E 2 50 0.58 4 x 100 1.2 x 101 142 20.6 0.114

5.5AMWNA3E 3 50 0.32 1.8 x 101 1.1 x 102 142 20.6 0.114

5.5AMWNA4E 4 50 0.19 4.6 x 101 3 x 102 142 20.6 0.114

5.5AMWNA5E 5 50 0.15 7.9 x 101 5.1 x 102 142 20.6 0.114

5.5ABWNA0.5E 0.5 50 50.2 0.49 x 100 1.4 x 100 142 25.4 0.19

5.5ABWNA1E 1 50 25.1 2 x 100 5.7 x 100 142 25.4 0.19

5.5ABWNA2E 2 50 18 1.2 x 100 3.4 x 100 142 25.4 0.19

5.5ABWNA3E 3 50 0.47 6.3 x 100 1.8 x 101 142 25.4 0.19

5.5ABWNA5E 5 50 0.2 3.2 x 101 2 x 102 142 25.4 0.19

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 5.5 kV

Current: 0.5 - 5A

Breaking capacity: 50 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks

to the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 1 9

Ø 1 9

Ø D

1, 6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

38 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

7.2 kV - Voltage and auxiliary transformer fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 7.2 kV

Current: 3.15 - 6.3A

Breaking capacity: 45 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 19

Ø 1 9

Ø D

1, 6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

ABWN* 142 30 25.4

ABCN* 195 30 25.4

AMWN 142 16 20.6

OBCN* 195 30 25.4

OBWN* 142 30 25.4

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

7.2ABWN*3.15 3.15 45 0.61 6.3 x 100 4 x 101 142 25.4 0.19

7.2ABWN*6.3 6.3 45 0.24 4.8 x 101 3.1 x 102 142 25.4 0.19

7.2ABCN*3.15 3.15 45 0.61 6.3 x 100 4 x 101 195 25.4 0.245

7.2ABCN*6.3 6.3 45 0.24 4.8 x 101 3.1 x 102 195 25.4 0.245

7.2AMWNA0.5E 0.5 50 47.5 0.2 x100 1 x 100 142 20.6 0.19

7.2AMWNA1E 1 50 23.3 1.2 x 100 4.8 x 100 142 20.6 0.19

7.2AMWNA2E 2 50 1.37 1.7 x 100 8.8 x 100 142 20.6 0.19

7.2AMWNA3E 3 50 0.77 4 x 100 2.7 x 101 142 20.6 0.19

7.2AMWNA4E 4 50 0.43 1.2 x 101 5.1 x 101 142 20.6 0.19

7.2AMWNA5E 5 50 0.27 2.8 x 101 1.4 x 102 142 20.6 0.19

7.2OBCN*3.15 3.15 45 0.61 6.3 x 100 4 x 101 195 25.4 0.245

7.2OBCN*6.3 6.3 45 0.24 4.8 x 101 3.1 x 102 195 25.4 0.245

7.2OBWN*3.15 3.15 45 0.61 6.3 x 100 4 x 101 142 25.4 0.19

7.2OBWN*6.3 6.3 45 0.24 4.8 x 101 3.1 x 102 142 25.4 0.19

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 39

12 kV - Voltage and auxiliary transformer fuse links

Specifications

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 12 kV

Current: 3.15A

Breaking capacity: 45 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 1 9

Ø 1 9

Ø D

1, 6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

ABCN* 195 30 25.4

OBCN* 195 30 25.4

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

12ABCN*3.15 3.15 45 1.21 6.3 x 100 1.8 x 101 195 25.4 0.245

12OBCN*3.15 3.15 45 1.21 6.3 x 100 1.8 x 101 195 25.4 0.245

40 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

15.5 kV - Voltage and auxiliary transformer fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 15.5 kV

Current: 3.15A

Breaking capacity: 32 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 1 9

Ø 1 9

Ø D

1, 6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

ABFN* 254 30 25.4

OBFN* 254 30 25.4

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

15.5ABFN*3.15 3.15 32 1.24 6.3 x 100 4 x 101 254 25.4 0.31

15.5OBFN*3.15 3.15 32 1.24 6.3 x 100 4 x 101 254 25.4 0.31

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 41

17.5 kV - Voltage and auxiliary transformer fuse links

Specifications

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

17.5ABGN*3.15 3.15 35 1.45 6.3 x 100 4 x 101 359 25.4 0.43

17.5OBGN*3.15 3.15 35 1.45 6.3 x 100 4 x 101 359 25.4 0.43

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 17.5 kV

Current: 3.15A

Breaking capacity: 35 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 1 9

Ø 1 9

Ø D

1 ,6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

ABGN* 359 30 25.4

OBGN* 359 30 25.4

42 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

24 kV - Voltage and auxiliary transformer fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 24 kV

Current: 3.15A

Breaking capacity: 25 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

B 1 9

Ø 1 9

Ø D

1,6

flPPEROWZLWK%6:WKUHDG

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

ABGN* 359 30 25.4

OBGN* 359 30 25.4

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

24ABGN*3.15 3.15 25 2 6.3 x 100 4 x 101 359 25.4 0.43

24OBGN*3.15 3.15 25 2 6.3 x 100 4 x 101 359 25.4 0.43

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 43

36 kV - Voltage and auxiliary transformer fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 36 kV

Current: 3.15A

Breaking capacity: 31.5 kA

Agency information

Comply with BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

B 1 9

Ø 1 9

Ø D

1, 6

flPPEROWZLWK%6:WKUHDG

Ferrule fuse links tag type ‘A’ shown in full lines and ‘22’: tag shown in dotted lines

Dimensions - mm

Fuse link reference A (mm) B (mm) D (mm)

OBGN* 359 30 25.4

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

36OBGN*3.15 3.15 31.5 25 1.2 x 101 7.7 x 101 359 25.4 0.43

* The last letter of the ordering code on these items is normally either “A” or “22”, please refer to how to order page 8.

44 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

3.6 kV - Voltage and auxiliary transformer type CAV Fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 3.6 kV

Current: 2A

Breaking capacity: 50 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

3 0 ,5

Ø 41 ,3 Dimensions - mm

Fuse link reference A (mm)

3.6CAV 220

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

3.6CAV2 2 50 0.49 6.2 x 100 1.8 x 101 220 41.3 0.7

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 45

5.5 kV - Voltage and auxiliary transformer type CAV Fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 5.5 kV

Current: 0.5 - 15A

Breaking capacity: 50 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

30 ,5

Ø 4 1 ,3

PD[PPWUDYHODIWHURSHUDWLRQ

Shown with striker fitted.

Dimensions - mm

Fuse link reference A (mm)

CAV and CAVH 187

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

5.5CAVH0.5E 0.5 50 12.1 1.4 x 101 9 x 101 187 41.3 0.6

5.5CAVH1E 1 50 12.1 1.4 x 101 9 x 101 187 41.3 0.6

5.5CAVH2E 2 50 0.39 1.8 x 101 1.1 x 102 187 41.3 0.6

5.5CAV15E 15 50 0.49 5.5 x 102 3.5 x 103 187 41.3 0.6

CAV fuse links are suitable for indoor use in air only.

Type CAVH fuse links are fitted with striker pins which may be used for indication purposes.

46 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

7.2 kV - Voltage and auxiliary transformer type CAV Fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 7.2 kV

Current: 2 - 10A

Breaking capacity: 40 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

Dimensions - mm

Fuse link reference A (mm)

CAV 220

30,5

Ø 4 1 ,3

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

7.2CAV2 2 40 0.89 6.2 x 100 1.8 x 101 220 41.3 0.7

7.2CAV4 4 40 0.50 2 x 101 5.7 x 101 220 41.3 0.7

7.2CAV6 6 40 0.32 4.8 x 101 1.4 x 102 220 41.3 0.7

7.2CAV10 10 40 0.22 1.1 x 102 3.2 x 102 220 41.3 0.7

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 47

12 kV - Voltage and auxiliary transformer type CAV Fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 12 kV

Current: 2A

Breaking capacity: 40 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

30 ,5

Ø 41, 3 Dimensions - mm

Fuse link reference A (mm)

CAV 220

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

12CAV2 2 40 1.34 6.2 x 100 1.8 x 101 220 41.3 0.7

48 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

15.5 kV - Voltage and auxiliary transformer type CAV Fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 15.5 kV

Current: 0.5 - 7 A

Breaking capacity: 80 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

30, 5

Ø 41 ,3

PD[PPWUDYHODIWHURSHUDWLRQ

Dimensions - mm

Fuse link reference A (mm)

CAV and CAVH 327

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

15.5CAV0.5E 0.5 80 151 0.5 x 100 1.5 x 100 327 41.3 0.9

15.5CAV1E 1 80 75.4 2 x 100 5.8 x 100 327 41.3 0.9

15.5CAV2E 2 80 32.3 1.2 x 100 3.5 x 100 327 41.3 0.9

15.5CAV3E 3 80 16.2 4.8 x 100 1.4 x 101 327 41.3 0.9

15.5CAV5E 5 80 0.66 2 x 101 1.3 x 102 327 41.3 0.9

15.5CAV7E 7 80 0.38 7.1 x 101 4.5 x 102 327 41.3 0.9

15.5CAVH0.5E 0.5 80 30.1 1.4 x 101 9 x 101 327 41.3 0.9

15.5CAVH1E 1 80 30.1 1.4 x 101 9 x 101 327 41.3 0.9

15.5CAVH2E 2 80 0.95 1.8 x 101 1.1 x 102 327 41.3 0.9

CAV fuse links are suitable for indoor use in air only.

Type CAVH fuse links are fitted with striker pins which may be used for indication purposes.

EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com 49

17.5 kV - Voltage and auxiliary transformer type CAV fuse links

Specifications

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

17.5CAV2 2 40 1.69 6.3 x 100 1.8 x 101 220 41.3 0.7

17.5CAV4 4 40 0.61 4.8 x 101 1.4 x 102 220 41.3 0.7

17.5CAV6 6 40 0.36 1.4 x 102 4 x 102 220 41.3 0.7

17.5CAV10 10 40 0.24 3.2 x 102 9.2 x 102 220 41.3 0.7

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 17.5 kV

Current: 2 - 10 A

Breaking capacity: 40 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

30, 5

Ø 4 1 ,3 Dimensions - mm

Fuse link reference A (mm)

CAV 220

50 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—June 2025 www.eaton.com

24 kV - Voltage and auxiliary transformer type CAV fuse links

Specifications

Description

Voltage transfomer fuse links. suitable for the protection of

auxiliary transformers.

Ratings

Voltage: 24 kV

Current: 2 - 4A

Breaking capacity: 40 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves

See list page 104

Features and benefits

• Cool running, low watts loss and power dissipation thanks to

the M-effect ensuring high levels of substation utilisation.

• Silver elements ensuring high conductivity and low power

(revenue) loss.

• 100% X-ray, all our medium voltage fuse links are X-rayed

ensuring the highest possible standards are maintained.

Typical applications

• Protection of auxiliary transformers.

3 0 ,5

Ø 4 1, 3 Dimensions - mm

Fuse link reference A (mm)

CAV 340

Part numbers and technical data

Joule integral (I2

Part numbers

Current

In (A)

Breaking

capacity

I1 (kA)

Cold

resistance

mΩ

Minimum

pre-arcing

Maximum

operating

Length

Diameter

Weight

24CAV2 2 40 2.54 6.2 x 100 1.8 x 101 340 41.3 1

24CAV3 3 40 1.43 2 x 101 5.7 x 101 340 41.3 1

24CAV4 4 40 0.92 4.8 x 101 1.4 x 102 340 41.3 1

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