Leadership in fusible circuit protection solutions

\* We make what matters work.

\*

AtEaton,we believe that powerisa fundamental part of just about everything people do.That's why we're dedicated to helpingourcustomers find newways to manage electrical,hydraulic and mechanical power more efficiently, safelyand sustainably.To improve people's 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

Contactdetails

Customersatisfactionteam

Eaton's customersatisfaction teamisavailable to answer questions regarding Eaton'sBussmannseriesproducts.

Europe callscan bemade 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

Visitwww.eaton.comfor the following resources:

·Product cross reference
·Product profiles
·Online catalogues for the latest United States and European catalogues.

Applicationengineering

Application engineering assistance is available to all customers. The application engineering team is staffedby university-qualified electrical engineerswho are available with technical and applicationsupport.

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

Company overview

Eaton is the leading source of fusible circuit protection solutions in the global marketplace. Eaton'sBussmann series products are approved for use around the world andmeetagencyrequirementsandinternational standards: IEC,VDE,IN,UL,CA,BS and other.

Theheadquarters for Eaton's Bussmann series product lineis located in Burton-on-the-Wolds, Leicestershire (UK) and is part of Eaton's Industrial ControlandProtection EMEAdivision.

Eatonmanufacturesover50,oo0Bussmannseriespartnumbers, coveringextensive fusible circuit protection solutions fora wide rangeofapplications:residential, industrial,motor protection, powerconversionanddistribution.

Eaton has been a leading exponent in the design, development andmanufactureoffuse linksandtheirassociatedaccessories formore than 1o0 yearsand hassupplied fuse linksto more than 90 countriesworldwide.

Eaton'steam of specialist Engineersand Field Applications Engineersplaysaleadingroleininternationalstandardisation offuse linksofferingcomprehensiveadvice on selectionand applications.

With a continual commitment to meet our customers' needs with innovative high quality products with ISO 9001 'approval systems',Eaton isthesupplierofchoice forcircuit protection solutions.

Tableofcontent

Introduction to medium voltage fuse link technology . .6
How to order .8
DIN Fuse links... ..9
Motor fuse links... ..23
Auxiliarytransformerfuse links .33
Oil fuselinks.. .53
Britishstandardairfuselinks .61
USStyle E-Rated fuse links .73
Fuse clips. .91
Expulsion fuse links ...92
Crossreferences.. .. .94
DIN Fuse links .95
Motorfuselinks .96
Voltageandauxiliarytransformer fuse links. .96
Oil fuse links .97
British standard air fuse links.. .98
USStyle E-Rated fuse links .99
Timecurrentcurvesandcut-offcurveslist. .104

ndex 106

Introduction to medium voltage fuse link technology

Offering unparalleled short-circuit interruption capabilities, Medium Voitage (MV) current-limiting fuse links are the principle protection device used by electrical utilities and switchgearmanufacturers throughout the world.

Safe,reliable,environmentally friendlyand cost effective,MV Fuse linksare 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 interruptinga short-circuit fault,achieving a current zero well within the first half-cycle of a fault.Energy let-through into the siteof a faultmaybe typically only 1 / 5 0 0 ^ { { t h } } of that of any other type of switching device.

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 powersupply qualityalso results from theuse of fuse links. High faultcurrentsare interrupted ina fewmilliseconds, minimising voltage dipsinsystemsupply voltage.

The main standard covering Medium voltage (MV) fuse links is IEC60282-1,2009.IECdefinesMVasfrom1kVto 7 2 . 5 \mathsf { k V } .

Current-limitingMVFuse links,split into three internationally recognised types: back-up (or sometimes called partial range), fuse links, which will interrupt any current from their rated Breakingcapacitydown toa Minimumbreakingcurrent, specified by the manufacturer. General purpose MV Fuse links will interruptallcurrentsthatwillmelt theelementswithin one hour. Full range MVFuse 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 \mid _ { 3 }

Medium Voltage electrical fuse link performance to IEC 60282-1

Current-limiting MV Fuse links are similar in construction to Lowvoltage (LV) cartridge types.Fuse elements do need to bemuch longer howeverto safely interruptamediumvoltage short-circuit.This isachieved bywinding 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 2 5 0 ~ \mathsf {mm } length body.The elements are surrounded bya pure,highly compacted granular quartz filler.

Like a LV fuse link,a MV Fuse link has a ceramic body.Most current-limitingMVFuselinksarealso fittedwithastriker mechanism.This isused to operate the trip bar ormechanism ina fuse-switch combination,fuse-switch or ring main unit (RMU)toachieve lowoverload fault interruptionand threephase disconnection.

Typically striker mechanisms are driven bya spring mechanism, triggered bya thinstrikerwire orstrikercoil 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 itand pushing out the striker.

Introduction to medium voltage fuse link technology

Non-current limiting

Essentially,non-current limiting fuse links have short elements and incorporate some means of lengthening thearcafter the element melts,extinguishing the arc and preventing re-ignition. These are known as expulsion fuse links.

Expulsion fuse linksarean effectiveway of protecting overhead distribution linesand transformers.Theyare designed for outdooruse onlyand comprisea tin orcopper fuse element in serieswitha flexible braid ina tube.The tube forms one side of a triangle,with a latched connection at the top and a hinge atthe bottom.The braid emerges from oneend 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 effectsof lowoverload faults

During overload faults lasting a long time,it is possible for medium voltage (MV) elements to get very hot prior to actualy melting. Given that silver has a melting temperature of 960oC, for fuse links with no temperature limitation,this can result ina fuse barrel temperature of over 400oC and 180oC at the insulating surface surrounding the fuse.To prevent deteriorationof the insulationand to the fuse link itself,allMV Fuse links should incorporate some form of technology to limit the thermal stress- heating, that is possible under prolonged low overload faults,often referred toas 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 itsMV Fuse link range.A small mass of special lowmelting point alloy isadded 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 runningand lower power dissipation under normal service conditions than comparable temperature limitation technology.

Othermanufacturers employa temperature-limiting (or thermal) striker to overcome their overheating problems. In general with thisapproach the maximum temperatures reached by the fuse link and its surrounding insulation are notas lowaswith the use ofM-effect.Sucha solution isno moreeffective thanuse of M-effect on the fuse link elements and moreover doesnot bring the additional advantages of lowerwatts loss,cooler running and greater withstand against transient surge currents.

Whenan Eaton's Bussmann series fuse link operatesunder lowoverload fault conditions themaximum temperature rise of the fuse link is such that the temperature of the surrounding synthetic insulationremains below the temperature limits for all insulated fuseswitchgear.The fuse barrel therefore remains intact and the fuse carrier and its contacts remain unimpaired.

Typicallyan Eaton's Bussmann series MV Fuse link of a given rating may run 10-30oC cooler than comparable fuse links which do notemploy M-effect.Thisadvantageisparticularly useful when the MV Fuse link is used in totallyenclosed 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 hencea smaller rating of MV Fuse link will do the same job asa higher rated MV Fuse link from another manufacturer.

In shortM-effect fuse linksare generally safer,give better protectionand are longer lasting thanalternative designs, whichdonotemploy thesevaluable features.

GLOSSARYFORMEDIUMVOLTAGEFUSELINKS

The following isa brief introductiontomedium voltage fuse linktechnology.Some of the termsarealsoused in otherareasof fuse technology.

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

Derating-Areferencetothe factthatall MVFuse links mustbederated once theyareplaced inaconfined space,forexample whenmountedinswitchgear.The fuselinkmustbederatedtotakeintoaccounttheeffect ofheating onelement resistance. Typicallya fuse link is deratedbybetween5-2o%dependingonapplication.

TestDuty,TD-A termused to refer toa specific type testwithinthe IEC standard.TestDutyone (TD1),shortcircuittest,estutytwo(2),maimumarcegy testandTestDutythree(TD3),lowovercurrenttest.

MinimumBreakingcapacity Current,MBC,I3-e minimumcurrentthefuselinkcaninterruptsafely, withoutassistance fromswitchgearwith instantaneous strikertripping.

MinimumFusingCurrent (MFC)-Theminimumcurrent whichwillcausethefuselinkelementstostarttomelt.

I²T-Theminimumvalueof pre-arcingandmaximum valueof total clearingenergya fuse linkwillallow topassthroughitduringshortcircuitoperation, expressedasanamountofcurrent (l2),multiplied by timeinseconds.

Wattsloss-Thepowerdissipation ofthe fuse linkata statedvalueof loadcurrent.

Breakingcapacity,I1-Themaximumshortcircuit currentthefuselinkhasbeentestedtoinaccordance withtest Dutyone (TD1),expressed inkA.

Resistance-Theresistanceofthefuse linkinfreeairat (20oC),measuredinΩ.

Howtoorder

1-Voltage
2—Type designation letter
3-Barrel diameter
4-Barrel length
5— Striker information \*
6-Tag information
^ { \star } \mathsf { S } = Spring striker 50N
^ { \star } \mathsf { E } = Spring striker 80N
（20 { } ^ { \star } \mathsf { N } = No striker fitted
^ { \star } \mathsf { H } { \cal M } = Pyrotechnic striker

Part numbers 12TDLEJ50 representsan outdoor DIN Fuse rated at \Omega \kappa v for use in Air (T) withabodydiameterof \mathsf { 5 0 . 8 } \mathsf {mm } (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.

DINMediumvoltage fuse links

Introduction to DiNMediumvoltage fuse links. 10
Featuresand benefits. .11
GeneralguidetotheselectionofDiNFuselinks .12
3.6 kV'A'and 'W' Range current limiting back-up fuse links.. .14
7.2kV'T'Range currentlimiting back-up fuse links.. .15
12kV‘F'Rangecurrentlimitingfull 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
24kV'A'and'T'Range current limitingback-up fuse links.. ..20
36kV'T' Range current limitingback-up fuse links .21
Striker force diagrams. .22

IntroductiontoDiNMediumvoltagefuse links

·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 kVto 36 kV.
·TRange is suitable for outdoor use.
·Motor circuit fuse link option,see motor fuse links sectior page24.

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 linksavailable 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 thatare optimised to improve discrimationwith 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 linksaresuitable forboth indoorandoutdoor applicationsand are fitted with a spring striker.This gives either an output force of 8oN with a travel of 3 0 \mathsf {mm } in the caseof fuse linkswith partnumberssequence'E',or in the case of part numbers referring to ‘S',a spring striker with an output force of 5 0 \mathsf { N } and a maximum travel of 2 6 ~ \mathsf {mm }

Eaton's Bussmann series'F' Range

Eaton's Bussmann series'F'range fuse links have full range' clearing capability.Theyare designed to clear low overloads rightdownto the fuselinks'Current inaccordancewiththe latest IEC 60282-1 requirements.Theyare thus suitable foruseasa sole formof protection.'F' range time-current characteristicsare especiallyadvantageous fortransformer protection applications.

Eaton's Bussmannseries'A'Range

This earlier,well proven,design has valuesof minimum breaking current between the T'and'F'range including higher current ratings.

Applications

MV DIN Fuse linksare suitable for primary side transformer protection,fuse switch combination unit, fuse bases and fuse switches.

Featuresandbenefits

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 independenttest laboratoriesofKEMA.Allotherperformance requirements such as temperature-rise, time-current characteristics, weather sealing etc. have been thoroughly tested to ASTA approval procedures.

AllEaton's BussmannseriesmediumvoltageDINFuse 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 runningand 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.

Cooloperation.When Eaton's Bussmann series MVFuse links operate under low fault conditions,the maximum temperature rise of the fuse link is well within the temperature limits for all switchgeardue to theuseofM-effect,ensuring fuse carrier contacts remain unimpaired, thereby increasing the life cycle of the substation and so reducing capital and maintenance costs.

Silverelements.All Eaton's Bussmann series back-up MV Fuse links use 9 9 . 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-effectallowsa larger element cross section fora given current rating, improvingwithstand capability against transient overcurrents due to transformer magnetizing inrush current,reducingmal operation.This improves system reliability reducing maintenance costs.

Lowarcvoltagesduringshort-circuitoperation.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 cablesarenot unduly stressed bybeing exposed to high arcvoltages,therebyprolonging the lifeof theswitchgearand improvingassetutilisation.

Additionally,stockholdingsandpartnumberscanbereduced asa24kVEaton'sBussmannseriesMVDINfuse linkcanbe used ona 12kV system. Utilities that runa mixed voltage network (say24,15.5,13.812 and \boldsymbol { \ 1 } 0 \mathsf { k V } ) can standardise on one type of switchgear with one type of fuse link, reducing costs and removing the need foranadditional fuse extension and inventory.

Construction.All electrical connectionswithin the Eaton's BussmannseriesMVFuselinkaremadebyweldedorbrazed joints.This firstly ensuresa very mechanically robust fuse link and secondly, greatly reducesthe risk of poor intermittent internal contacts,improving substation reliability.

X-Ray.All Eaton's BussmannseriesMVFuse linksareX-rayed during production. Element alignment, M-effect position, etc areall 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 othermedium voltage fuse link manufacturers, Eaton's Bussmann series medium voltage fuse elements employa "neck"or'notch'design principle as opposed toa 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.

Leadand cadmiumFree.All Eaton's BussmannseriesT' Ranges fuse linksare leadandcadmium freeandmeetwiththe latestWEEE and RoHS directives.RoHSis less than1000 VAC.

Recyclingscheme.Eatons operatesa recycling scheme for all medium voltage fuse links,please contact buletechnical@ eaton.com for further information.

General guide to theselection ofDiNBack-up fuse links

Back-up fuse links

SelectionguideusinglowvoltagefuselinksoperatingclassgG/gLonlowvoltagesideforindividualcableexitprotection see figure 1.

Figure 1: shows single exit from transformer. The cable exits the transformerand 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 fusefitted as secondary overload protection directly on the transformer secondary output. The preferred method,the MV primary fusemust coordinate with thesecondary overload LV fuse. <br>Figure1 Individual cable exit protection <br>Figure2 Overload protectionof the transformer

General guide to the selection of DiNFull range fuse links

Full range fuse links

Selection guide using low voltage fuse links operating class \operatorname { g G } / \operatorname { g L } on low voltage side for individual cable exit protection,see figure 1 opposite page.

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

SelectionoftheseMVFuselinkshasbeenbased onthe followings:

1.The fuse linkshould withstand transformer magnetisinginrushcurrents,takenas12timesfull loadcurrentfor0.1seconds.
2.TheprimaryMVFuselinkshoulddiscrimatewiththe secondaryLVFuseinallcasesasshowninfigure2. Whereindividualcableexitisusedandnosecondary LVFuseisfitted,theMVFuseshoulddiscriminatewith thelargestfusefitteddownstreamtothesecondary sideof thetransformeratthedistribution panel.
3.The fuse link should operate within two seconds fortransformerscomplyingwith IEC 60076-5in respectofimpedance,voltageandshort-circuit withstandcurrent.
4.The fuse linkshould operate reasonably quickly intheeventofatransformerinternal faultoran earthfaultinthesecondaryterminalzoneofthe transformer.
5.Inthecasewherethereisnosecondaryfuselinkfor overloadprotection,theminimumrecommended MVFuse link ratingapplies to the use of fuse links inencapsulatedenclosureswhere permissible continuousoverloadisgenerallylimitedto120%of transformerfullloadcurrent.However,ifgreater overloadcurrentsare permissible,ahigherratingof fuselinkmayberequired.Wherethefuselinkisused inopenairorconditionsofunrestrictedventilationa higherpermissibleoverloadmaybepossible.
6.Inmostcasesmore than one rating of MV Fuse link isrecommendedforaparticulartransformersize. Choice of fuse linkwill then depend onwhich fuse link offersthe best protection;e.g.,havingone fuse link fo severaltransformersizes.

Recommendationsforothervoltageareavailableonrequest, pleaseemail buletechnical@eaton.com.

3.6kV-'A&W'Range current limitingback-upfuse 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.

Ratings

Voltage:3.6 kV Current:6.3- 200 A Breaking capacity: 40 - 50 kA.

Agency information

Complywith DINDimensionalstandard DIN43625,VDE0670 part 4 and with IEC 60282-1 (2005).
Suitable for outdoor use.

Time-currentcurvesand cut-off curves

See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all ourmedium voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Primary side transformer protection.
·Used in fuse switch combination unit.
·Used in fuse bases.
·Used in fuse switches.

Dimensions-mm

7.2kV-'T'Rangecurrent limitingback-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.

Ratings

Voltage:3-7.2kV Current: 6.3 - 160 A Breaking capacity: 40 kA

Agency information

ComplywithDINDimensionalstandard DIN43625,VDE0670 part 4 and with IEC 60282-1 (2005).Suitable for indoor and outdoor use.

Time-current curvesand cut-off curves

See list page 104

Featuresandbenefits

·Cool running,lowwatts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. ： 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Primary side transformer protection.
·Used in fuse switch combinationunit.
·Used in fuse bases.
·Used in fuse switches.

12kV-'F'Rangecurrent limitingfullrangefuse links

Specifications

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-currentcurvesandcut-offcurves

See list page 104

Featuresandbenefits

Cool running,lowwatts lossandpowerdissipationthanks to the M-effect ensuring high levels of substation utilisation.
·Silver elements ensuring high conductivity and low power (revenue) loss.
· 1 0 0 % X-ray,all our medium voltage fuse linksare 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

Partnumbersandtechnicaldata

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

Specifications

Description

Arange of mediumvoltage DINFuse 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:6-12kV Current: 6.3 - 200 A Breaking capacity: 50 - 63 kA

Agency information

Complywith DINDimensionalstandard DIN43625,VDE 0670 part 4,VDE0670 part 402 and with IEC 60282-1 (2005). Suitable forindoorandoutdooruse

Time-currentcurvesand cut-off curves

See list page 104

Featuresandbenefits

·Cool running, low watts lossand power dissipation,thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all our highvoltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Typicalapplications

·Primary side transformer protection ·Used in fuse switch combination unit ·Used in fuse bases
· Used in fuse switches.

Partnumbersand technicaldata

EJFuses

SJ Fuses

Dimensions-mm

17.5kV-'A' and 'T'Range current limitingback-up range fuse links

Specifications

Description

A range of medium voltage DIN Fuse links, complete with sealed striker,suitable for transformerprotection.The fuse links can be used even when there is no secondary low voltage protection,provided theyare used with fuse switches fitted with instantaneous striker tripping.

Ratings

Voltage:10-17.5kV Current: 6.3 - 125A 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 issuitable for indooruse. T'range is suitable for indoor and outdoor use.

Time-currentcurvesand cut-offcurves

See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all our high voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Typical applications

EJ Fuses

·Primary side transformer protection ·Used in fuse switch combination unit ·Used in fuse bases
·Used in fuse switches.

SJ Fuses

Dimensions-mm

Partnumbersandtechnicaldata

24kV- 'F'Range current limiting full range fuse links

Specifications

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: 6.3-45A Breaking capacity: 35.5 kA

Agency information

Complywith DINDimensionalstandard DIN43625,VDE 0670 part 4,VDE 0670 part 402 and with IEC 60282-1 (2005). Suitable for indoor use.

Time-currentcurvesand cut-offcurves

See list page 104

Featuresandbenefits

·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.
： 1 0 0 % X-ray,all our high voltage fuse linksare 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.

Partnumbersandtechnicaldata

Typical applications

·Primary side transformer protection.
·Used in fuse switch combination unit.
· Used in fuse bases without instantaneous striker tripping.
·Used in fuse switches.

24kV-'A'and'T' Range current limitingback-up fuse links

Specifications

Description

A range of mediumvoltage DINFuse links, complete with sealed striker,suitable for transformerprotection.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:12-24kV Current: 6.3 - 160 A Breaking capacity:20 - 63kA

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 issuitable for indooruse. T'range is suitable for indoor and outdoor use

Time-currentcurvesand cut-offcurves

See list page 104

Featuresandbenefits

·Cool running,lowwatts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Primary side transformer protection.
·Used in fuse switch combination unit.
·Used in fuse bases.
·Used in fuse switches.

Dimensions-mm

36 kV-'T' Range current limitingback-up fuse links

Specifications

Description

A range of medium voltage DIN Fuse links, complete with sealed striker,suitable for transformerprotection.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:18-36kV Current:3.15-63A Breaking capacity: 20 -35.5 kA

Agency information

Complywith DINDimensional standard DIN43625,VDE 0670 part 4,VDE 0670 part 402 and with IEC 60282-1 (2005). Suitable for indoor and outdoor use.

Time-current curvesand cut-off curves

See list page 104 featuresand benefits

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivityand low power (revenue) loss. · 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Typical applications

·Primary side transformer protection.
·Used in fuse switch combination unit.
· Used in fuse bases.
· Used in fuse switches.

Partnumbersandtechnicaldata

SJFuses

Dimensions-mm

Striker forcediagrams

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

S = Spring striker 50N to DIN 43625and IEC60282-1 Designation‘Medium'

Mediumvoltagemotorfuse links

Introductiontomotorfuse links 25
Britishstandard 3.6kV. 26 7.2 kV. 28 12 kV. 29
DIN 3.6kV. .30 7.2kV 31
USA 2.75kV 32 5.5kV 33

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 355A
·North American dimensioned productsalso available,2R to 24R ratings.

Eaton'sBussmannseriesmotorfuse links

Eaton's Bussmannseriesmotor fuse linksaredesigned tomeet the specific requirementsnecessary for motor protection. During the starting cycle of direct on-line motors, the fuse elementswill reacha 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 itsnormal 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 seriesmotor fuse linksencompassanadvanced 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 underheavy faultcurrents,resultingfromthe time-current characteristic. Low power dissipation ensures low temperature rise,important in multi-tier starters for example.Switching(Arc) voltagesare lower than permitted values, therefore,5.5kVfuse linksare also suitable for 4 . 8 \mathsf { k V } and 2 . 4 \mathsf { k V } circuits.

Application

Fuse links provide short-circuit protection in motor circuits to both the motorstarterand cables from the starterto the motor. Overload protection is provided by the motor starter, generallyby an overload relayand contactor.Combination striker tripping may also form part of the associated equipment which houses the fuse links and motor starters.

Application procedure

Forany 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 beapproximatelyas follows:

·Pump motors-6 seconds ·Mill motors -10 to 15 seconds ·Fan motors-60 seconds

Theseareaverage valuesand theappropriate figures for starting current and starting time for actual installation should be obtained wherever possible.

Multiply the starting current by 1.7and using this value of current and the starting time,(it is recommended thata 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.

Forapplications using more frequent starting duties,a greater derating factor must be applied as shown below:

·Maximum2 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

Asimilarmethod of fuse selectionmay 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 gearcubicles,particularlywheremultitierstartersare involved.For further guidance please contact Eaton'sapplication engineers:buletechnical@eaton.com.

Notes

Forapplications involving more frequent starting duties than 16 times per hour or where unusual duty cycles are involved, consult Eaton'sapplication engineers foradvice:

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

3.6kV-Motorfuse links to Britishstandard dimensions

Specifications

Description

Motorfuse links providingshort circuit protection inmotor circuits to both the motorstarterand cables from the starter to the motor.

Ratings

Voltage:3.6 kV Current:5-450A Breaking capacity: 50 kA

Agency information BS 2692-1

Time-currentcurvesandcut-offcurves See list page 104

Dimensions-mm

Featuresandbenefits

Tag type'6'

·Cool running, low watts loss and power dissipation thanks to the M-effect.
·Silver elements ensuring high conductivity and low power (revenue) loss
： 1 0 0 % X-ray,all our medium voltage fuse linksare 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

Tag type 'O'

Triple barrel fuse link ( 3 ^ { n - 1 } ) barrel shown dotted) with 03 tags. Double barrel fuse link with O2 tags shown in full line.

3.6kV-Motorfuse linksto Britishstandard dimensions

Partnumbersandtechnicaldata

7.2kV-Motorfuse linksto British standard dimensions

Specifications

Description

Motor fuse links providing short circuit protection in motor circuits to both the motorstarterand cables from thestarter to the motor.

Ratings

Voltage: 7.2 kV Current: 25 -315A Breaking capacity: 40 kA

Agency information

Comply with BS 2692-1.

Time-currentcurvesand cut-offcurves

See list page 104

Featuresandbenefits

·Cool running, low watts loss and power dissipation thanks to the M-effect.
·Silver elements ensuring high conductivity and low power (revenue) loss.
· 1 0 0 % X-ray,al our medium voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.
·Allows motor start current to pass on without degradation of fuse link.

Typical applications

·Motor protection.

Dimensions-mm

Triple barrel fuse link(3rd barrel shown dotted) with O3 tags.
Double barrel fuse link with 02 tags shown in full line.

Partnumbersandtechnicaldata

12kV-Motorfuse linksto Britishstandard dimensions

Specifications

Description

Motor fuse links providing short circuit protection in motor circuits to both the motor starterand cables from the starter to the motor.

Ratings

Voltage:12kV Current:250-350A Breaking capacity:56 kA

Agency information Comply with BS 2692-1

Time-current curvesand cut-offcurves See list page 104

Featuresandbenefits

·Cool running, low watts loss and power dissipation thanks to the M-effect.
·Silver elements ensuring high conductivity and low power (revenue) loss.
· 1 0 0 % X-ray,all our medium voltage fuse linksare 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

Partnumbersandtechnicaldata

3.6kV-Motorfuse linksto DiN 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:3.6kV Current:50 -400 A Breaking capacity:50 kA

Agency information

Comply with IEC 60282-1,VDE0670 part 4and DIN Dimensional standard DIN 43625.

Time-current curvesand cut-off curves

See list page 104

Featuresandbenefits

·Cool running, low watts loss and power dissipation thanks to the M-effect.
·Silver elements ensuring high conductivity and low power (revenue) loss.
： 1 0 0 % 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.

Partnumbersandtechnicaldata

Typical applications

·Motor protection.

Dimensions-mm

7.2kV-Motorfuse links to DiN Standard dimensions

Specifications

Description

Motorfuse links providingshortcircuit protectioninmotor 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

Complywith IEC60282-1,VDE0670 part4and DIN Dimensionalstandard DIN43625

Time-current curvesand cut-off curves

See list page 104

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to the M-effect.
·Silver elements ensuring high conductivity and low power (revenue) loss.
： 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possible standards are maintained.
·Allows motor start current to pass on without degradation of fuse link.

Partnumbersandtechnicaldata

Typical applications

·Motor protection.

Dimensions-mm

2.75kV-Motorfuse links to USA Dimensions

Specifications

Description

R-ratedmediumvoltagecurrent limitingfuse links formotor protection.

Ratings

Voltage:2.75kV Current:2- 24 R Breaking capacity: 60 kA

Agency information

IEEE standards.

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to the M-effect.
·Silver elements ensuring high conductivity and low power (revenue) loss.
· 1 0 0 % X-ray,all ourmediumvoltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.
·Allows motor start current to pass on without degradation of fuse link.

Typical applications

·Motor protection.

A Tags (ferrule)

K Tags (double barrel fuse links)

Dimensions-mm

Partnumbersandtechnicaldata

5.5kV-Motorfuse linksto USA Dimensions

Specifications

Description

R-rated medium voltage current limiting fuse links formotor protection.

Ratings

Voltage:5.5kV Current:2-24R Breaking capacity: 60 kA

Agency information

IEEE standards.

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. ： 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Typical applications

·Motor protection.

Dimensions-mm

Partnumbersandtechnicaldata

A Tags (ferrule)

KTags (double barrel fuse links)

Mediumvoltageandauxiliarytransformerfuse links

Introductiontomediumvoltageandauxiliarytransformer fuse links.. 34

:dium voltageandauxiliary transfomer

1.1kV .35
3.6kV .36
5.5 kV - Type E. ..37
7.2kV .38
12kV .39
15.5kV. .40
17.5 kV .41
24kV .42
36kV. .43

Type CAV

3.6kV 44

5.5kV .45
7.2 kV. .46
12 kV. .47
15.5 kV. .48
17.5 kV. .49
24kV. .50
36 kV. .51
38kV. .52

Introduction to mediumvoltageandauxiliarytransformer 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 kVto 38 kV.

Eaton'sBussmannseriesvoltageandauxiliary transformerfuse links

Eatonmanufacturesa wide range of voltage transformer (VT) fuse links.In North America theyare referred to as 'potential transformer fuse links'.These fuse linksare 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 of3.15A.Experience has shown that there isa risk of spurious operation by transient overcurrentswhere lower current ratingsare used.Inaddition,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.

Highercurrentand 'E'ratingsareavailable forspecial applications,including auxiliary transformers.

A range of VT fuse linkswitha breaking capacity of 2oo kA for use at the output terminals of large turbo alternators can also beordered.For further information,please contact Eaton's application engineers:buletechnical@eaton.com.

Types prefixed 'A'or'N'are suitable foruse indoorsinair only.
Types prefixed ' 0 ^ { \prime } may be used under oil.

Application

Small rated fuse links for protection of voltage and auxiliary transformers. Back-up protection up to 3.15 Aand voltages from1.1kV to36 kV.

1.1kV-Voltageandauxiliarytransformerfuselinks

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:1.1 kV Current:2-6.3A Breaking capacity: 50 kA

Agency information

Complywith BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possiblestandardsaremaintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Ferrule fuse links tag type 'A' shown in fullines and ‘22": tag shown in dotted lines

3.6 kV-Voltage andauxiliarytransformer fuse links

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliarytransformers.

Ratings

Voltage:3.6kV Current:3.15-10A Breaking capacity: 50 kA

Agency information

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

Time-currentcurvesandcut-offcurves

See list page 104

Featuresandbenefits

·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. · 1 0 0 % X-ray,all our medium voltage fuse links are X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Ferrule fuse links tag type 'A' shown in fullines and ‘22': tag shown in dotted lines

5.5kV-Type EVoltage transformer fuse links

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:5.5kV Current: 0.5 - 5A Breaking capacity: 50 kA

Agency information

Complywith BS2692-1and IEC 60282-1.

Time-current curves and cut-off curves See list page 104

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possiblestandardsaremaintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Ferulefuse links tag type 'A' show in fullinesand2': tagshown indottedlines

7.2kV-Voltage and auxiliarytransformerfuse 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-currentcurvesandcut-offcurves

See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. ： 1 0 0 % X-ray,all our medium voltage fuse links are X-rayed ensuring the highest possible standardsare maintained.

Typical applications

Partnumbersandtechnicaldata

·Protection of auxiliary transformers.

Ferrule fuse links tag type 'A' shown in fullines and ‘22': tag shown in dotted lines

12kV-Voltageandauxiliarytransformerfuse links

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:12kV
Current: 3.15A
Breaking capacity: 45 kA

Agency information

Complywith BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves See list page 104

Featuresandbenefits

·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. ： 1 0 0 % X-ray,all our medium voltage fuse linksare X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Ferrule fuse links tag type 'A' shown in fulines and ‘22': tag shown in dotted lines

Dimensions-mm

15.5kV-Voltageandauxiliarytransformerfuselinks

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:15.5kV Current: 3.15A Breaking capacity:32 kA

Agency information

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

Time-currentcurvesandcut-offcurves

See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. ： 1 0 0 % X-ray,all our medium voltage fuse links are X-rayed ensuring the highest possible standardsaremaintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Ferrule fuse links tag type 'A' shown in ful lines and‘2': tag shown in dotted lines

17.5kV-Voltageandauxiliarytransformerfuselinks

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:17.5kV Current:3.15A Breaking capacity: 35 kA

Agency information

Complywith BS 2692-1 and IEC 60282-1.

Time-current curves and cut-off curves See list page 104

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all ourmedium voltage fuse linksare X-rayed ensuring the highest possiblestandardsaremaintained.

Partnumbersandtechnicaldata

Typical applications

·Protectionofauxiliary transformers.

Ferrule fuse links tag type 'A' shown in fullines and ‘22": tag shown in dotted lines

24kV-Voltageandauxiliarytransformerfuselinks

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:24kV
Current: 3.15A
Breaking capacity: 25 kA

Agency information

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

Time-currentcurvesand cut-offcurves

See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. ： 1 0 0 % X-ray,all our medium voltage fuse links are X-rayed ensuring the highest possible standardsaremaintained.

Typical applications

·Protection of auxiliary transformers.

Ferrule fuse links tag type 'A' shown in fullines and ‘22": tag shown in dotted lines

Partnumbersandtechnicaldata

36kV-Voltageandauxiliarytransformerfuselinks

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:36kV
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

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all ourmediumvoltage fuse linksare X-rayed ensuring the highest possiblestandardsaremaintained.

Partnumbersandtechnicaldata

Typical applications

·Protectionofauxiliary transformers.

Ferrule fuse links tag type 'A' shown in fullines and ‘22": tag shown in dotted lines

Dimensions-mm

3.6kV-Voltageandauxiliarytransformertype CAVFuse links

Specifications

Description

Voltagetransfomerfuse links.suitable fortheprotectionof auxiliary transformers.

Ratings

Voltage: 3.6 kV
Current: 2A
Breaking capacity: 50 kA

Agency information

Comply with IEC 60282-1.

Time-currentcurvesand cut-offcurves See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all ourmedium voltage fuse linksare X-rayed ensuring the highest possiblestandardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Dimensions-mm

5.5kV-VoltageandauxiliarytransformertypeCAVFuse links

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:5.5kV 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

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all ourmediumvoltage fuse linksare X-rayed ensuring the highest possible standardsaremaintained.

Partnumbersandtechnicaldata

Typical applications

·Protection ofauxiliary transformers.

HIGHVOLTAGE H.R.C.FUSE ET·N BUSSMANN 能 EE SF 00009 MADE INHUNGARY

Shown with striker fitted.

Dimensions-mm

7.2kV-VoltageandauxiliarytransformertypeCAVFuse links

Specifications

Description

Voltage transfomer fuse links.suitable fortheprotection of auxiliary transformers.

Ratings

Voltage:7.2 kV Current: 2- 10A Breaking capacity: 40 kA

Agency information

Comply with IEC 60282-1.

Time-currentcurvesand cut-offcurves See list page 104

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to theM-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all our medium voltage fuse links are X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Dimensions-mm

12kV-VoltageandauxiliarytransformertypeCAVFuse links

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:12kV
Current: 2A
Breaking capacity: 40 kA

Agency information

Comply with IEC 60282-1.

Time-current curves and cut-off curves See list page 104

Featuresandbenefits

·Cool running,low watts lossand power dissipation thanks to the M-effect ensuring high levels of substationutilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all ourmedium voltage fuse linksare X-rayed ensuring the highest possible standardsaremaintained.

Partnumbersandtechnicaldata

Typical applications

·Protection ofauxiliary transformers.

Dimensions-mm

15.5kV-Voltageandauxiliarytransformertype CAVFuse links

Specifications

Description

Voltage transfomer fuse links.suitable fortheprotection of auxiliary transformers.

Ratings

Voltage:15.5kV Current: 0.5-7A Breaking capacity: 80 kA

Agency information

Comply with IEC 60282-1.

Time-currentcurvesand cut-off curves See list page 104

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to theM-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all our medium voltage fuse links are X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

17.5kV-VoltageandauxiliarytransformertypeCAVfuselinks

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:17.5kV 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

Featuresandbenefits

·Cool running, low watts lossand power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivity and low power (revenue) loss. · 1 0 0 % X-ray,all ourmediumvoltage fuse linksare X-rayed ensuring the highest possiblestandardsaremaintained.

Typical applications

·Protection ofauxiliary transformers.

Dimensions-mm

Partnumbersandtechnicaldata

24kV-VoltageandauxiliarytransformertypeCAVfuse links

Specifications

Description

Voltage transfomer fuse links.suitable for the protection of auxiliary transformers.

Ratings

Voltage:24kV
Current: 2- 4A
Breaking capacity: 40 kA

Agency information

Comply with IEC 60282-1.

Time-currentcurvesand cut-off curves

See list page 104

Featuresandbenefits

·Cool running, low watts loss and power dissipation thanks to the M-effect ensuring high levels of substation utilisation. ·Silver elements ensuring high conductivityand low power (revenue) loss. ： 1 0 0 % X-ray,all our medium voltage fuse links are X-rayed ensuring the highest possible standardsare maintained.

Partnumbersandtechnicaldata

Typical applications

·Protection of auxiliary transformers.

Dimensions-mm