E-VAC Medium Voltage Vacuum Circuit Breaker

Automotive

Aerospace

Electrical Truck

Hydraulics

Automotive

Aerospace

Electrical Truck

Hydraulics

Powering business worldwide

Next generation

transportation

Eaton is driving the

development of new

technologies – from hybrid

drivetrains and emission control

systems to advanced engine

components – that reduce fuel

consumption and emissions in

trucks and cars.

Higher expectations We continue to expand our

aerospace solutions and

services to meet the needs of

new aviation platforms,

including the high-flying light jet

and very light jet markets.

Building on our strengths

Our hydraulics business

combines localised service and

support with an innovative

portfolio of fluid power

solutions to answer the needs

of global infrastructure projects,

including locks, canals and

dams.

Powering Greener Buildings

and Businesses

Eaton’s Electrical Group is a

leading provider of power

quality, distribution and control

solutions that increase energy

efficiency and improve power

quality, safety and reliability.

Our solutions offer a growing

portfolio of “green” products

and services, such as energy

audits and real-time energy

consumption monitoring.

Eaton’s Uninterruptible Power

Supplies (UPS), variable-speed

drives and lighting controls help

conserve energy and increase

efficiency.

Eaton delivers the power inside hundreds of products that are answering the demands of today’s fast changing world. We help our customers worldwide manage the power they need for buildings, aircraft, trucks, cars, machinery and entire businesses. And we do it in a way that consumes fewer resources.

MV switchgear technology

is in our DNA

Eaton’s range of

SF6 free switchgear

for Medium Voltage

Eaton Corporation is a worldwide leader in the

design, manufacture, and sale of safe, reliable

and high-performance medium voltage power

distribution equipment in accordance with IEC,

ANSI and GB / DL standards

Complete Global Medium Voltage Switchgear Solutions

Eaton, a premier leader in designing and manufacturing power

distribution and protection equipment in the electrical industry,

offers a comprehensive range of medium voltage (MV) solutions

to meet the needs of virtually every application. From products

that feature cutting-edge design that allow for easy access,

maintenance and space savings, to arc-resistant products that

enhance safety, Eaton’s medium voltage solutions provide a

variety of products for every need. Additionally, Eaton’s global

service network provides maximum customer support in all

regions of the world.

As one of the few completely vertically integrated and diversified

industrial manufacturers in the world, Eaton designs not only MV

assemblies, but also the key components that comprise the MV

solutions – from steel housing and circuitbreaker compartments

to vacuum interrupters, circuit breakers, bus systems and fuses.

Eaton’s MV heritage, strengthened by acquisitions such as

Westinghouse DCBU, Cutler Hammer, MEM and Holec, has

resulted in breakthrough MV technologies and numerous

international patents over the years.

Part of Eaton’s complete electrical PowerChain Solutions

– which help businesses minimize risks while realizing greater

reliability, cost efficiencies, capital utilization and safety –

Eaton’s medium voltage equipment meets all applicable

standards and certifications such as IEC, NEMA / ANSI, GB / DL,

UL, IEEE, KEMA and CSA.

When it comes to medium voltage solutions, you can trust the

one name with a long history of proven performance: Eaton.

E-VAC Medium Voltage Vacuum Circuit Breaker

Eaton Electric’s E-VAC medium

voltage vacuum circuit breaker has

high performance in electric

vacuum technology, which

embodies Eaton’s decades of

experience in design and

manufacturing of power distribution systems. With the features of

highly reliable and easy to operate

and maintain, Eaton provides

Chinese customers with highly

cost-effective products.

The product is proudly certified under the China Environmental Labeling

Product Certification (Type II) and has also obtained the Product Carbon

Footprint Certification.

The 3AS4 Vacuum Circuit Breaker meets stringent quality and compliance

standards, ensuring environmental responsibility throughout its entire

lifecycle—from production and usage to consumption and disposal. With

its low toxicity, minimal environmental impact, and resource-saving design,

it delivers significant ecological advantages while supporting sustainable

development.

In compliance with the

requirements of GB, DL and

other standards;

All specifications comply with

the requirements of National

Test Station and fully meet the

technical requirements of the

State Grid;

Equipped with Eaton’s new

generation vacuum interrupter,

E-VAC is more suitable for the

technical and operating

conditions of the power system;

Provided with Eaton epoxy resin

encapsulated pole unit, E-VAC

has superior and reliable

insulation performance. The

product has passed the

condensation test, is suitable

for reliable operation in harsh

environments, and has a

creepage distance and electrical

clearance which are above the

GB standards;

E-VAC Medium Voltage Vacuum Circuit Breaker

•

Product model

GB Circuit Breaker

Eaton Circuit Breaker Series Rated Voltage (kV) Rated Current (A)

Rated Short-circuit Breaking Current (kA)

Spring Operating Mechanism

E - VAC - 12 / T □ - □

Reasonable contact material

and shape can ensure small

chopping current and stable

contact resistance;

Fewer components and

reasonably compact structure

ensure more reliable and safer

operation;

Capable to properly fit in with

resistive as well as inductive

and capacitive loads;

The design of secondary plugs,

chassis, moving contacts and

grounding methods complies

with Chinese users’ habits and

is fully compatible with Chinese

mainstream medium voltage

switch cabinet, KYN28 cabinet.

Operating conditions Technical features Humidity

The ambient temperature shall

not exceed 40°C; and the

average temperature

measured within 24 hours

shall not exceed 35°C;

minimum ambient temperature: -25°C.

The influence of sunshine can

be ignored;

The ambient air is not

significantly polluted by dust,

smoke, corrosive or flammable

gas, steam, or salt mist;

Max endurable earthquake

intensity: Magnitude 8;

The magnitude of electromagnetic interference induced in

the secondary system shall not

exceed 1.6kV;

The maximum altitude shall

not exceed 3,500m (for use at

an altitude above 1,000m,

please contact Eaton Corporation).

The 24h mean of relative

humidity shall not exceed 95%;

The 24h mean of water vapor

pressure shall not exceed

2.2kPa;

The monthly average relative

humidity shall not exceed 90%;

The monthly average water

vapor pressure shall not

exceed 1.8kPa.

E-VAC adopts a mature spring

operating mechanism featuring

stable and reliable performance, long life, easy operation, and excellent anti-corrosion ability, and requires little

maintenance during its

lifespan;

E-VAC 12kV vacuum circuit

breaker adopts the mature

APG technology to seal the

vacuum interrupter and the

main circuit in an insulation

tube. This solves the problem

of deteriorated voltage

withstand performance of

insulation due to environmental influences and ensures that

the vacuum interrupter can

operate normally in harsh

environments;

The product has passed the

tests and meet the requirements of GB1984-2014 with

regard to E2 extended

electrical life, M2 extended

mechanical life and very low C2

restrike of capacitive current

switching;

The external dimensions and

the distribution cabinet

interlocking method are fully

compatible with the domestic

mainstream medium voltage

switch cabinet KYN28. High

universality can largely reduce

the design cost;

• • • •

•

• •

•

Tooling employed in product

assembly to ensure size

consistency. All products have

undergone the standard cabinet

push-in test before leaving the

factory to ensure the

interchangeability and versatility

of the products;

All products have gone through

hundreds of mechanical

running-in tests before leaving

the factory to ensure their stable

performance;

Advanced imported testing

equipment are employed to

record the no-load mechanical

characteristics of each product

and provide users with

performance curves to ensure

reliable product quality.

E-VAC medium voltage vacuum circuit breaker

Eaton Electric, a leading vacuum interrupter manufacturer and a

pioneer in vacuum technology, has engaged in research, development

and production of vacuum interrupters for more than 70 years and has

accumulated rich experience. Westinghouse has become a synonym of

quality and reliability.

We have top-notch domestic and overseas vacuum interrupter

factories with large-capacity high-voltage laboratories.

We have strong creativity as well as design and R&D capabilities.

Applications Technologies make history

E-VAC vacuum circuit breaker almost

needs no maintenance

The best choice for medium voltage power

distribution system control and protection

Eaton E-VAC vacuum circuit breaker has a simple structure, which can

further reduce the failure rate and make routine maintenance easier.

Through the indicators on the circuit breaker panel, you can easily

judge the working conditions of the breaker without using any testing

instrument.

The circuit breaker employs Eaton electrical vacuum interrupter,

featuring a high vacuum of 10–5Pa and extremely low leakage rate.

The operating mechanism of the circuit breaker is a spring energy

charging mechanism with excellent performance, which adopts a

modular design making the distribution of main parts of the mechanism optimized, the mechanism simpler, and the performance more

stable. The whole mechanism consists of three modules: Energy

charging, closing, and opening. The assembly and maintenance of the

three modules are very easy. The energy charging mechanism is

compact and comprised of a ratchet structure, an oscillator and a

closing spring. The operating mechanism is usually equipped with a

manual energy charging device and electric energy charging device,

which can realize automatic reclosing.

The circuit breaker of the manual energy charging operating mechanism is usually equipped with a manual opening and closing button,

circuit breaker position indicator, spring mechanism energy charging

state indicator, switching counter, auxiliary switch of shunt release,

position and fault signals, etc.

The circuit breaker of electric energy charging operating mechanism:

Additional auxiliary switches are provided for the energy charging

motor, shunt release, anti-jump relay, and energy charging motor

release.

The following accessories can also be provided to meet specific

requirements: Undervoltage release, overcurrent relay, etc.

Optional Accessories

Energy charging

handle

Handcart cranking

handle

Lifting handcart

• Chemical industry

• Petroleum industry

• Pipeline industry

• Offshore mining

• Shipbuilding industry

• Paper industry

• Opencast mine

• Substation

• Cement industry

• Automobile industry

• Power plant

• Textile and food industry

• Metallurgical industry

E-VAC medium voltage vacuum circuit breaker

Main specifications and technical parameters

Item Unit

times

630

1250

2500

1250 1600

2000 2500

3150 4000(1) 5000(1)

100

Value

42 (phase-to-ground, between phase) 48 (contact gap)

75 (phase-to-ground, between phase) 85 (contact gap)

630 1250

1600 2000

2500 3150

31.5

2000

20~50

35~70

30000 (4), 10000 (50kA)

50 (1,600A/31.5kA and below), 30 (2,000A and above, 40–50kA)

AC 110/220 DC 110/220

55~90

≤15

O–0.3s–CO–180s–CO

Technical parameters of opening and closing coils

Name Parameters

Rated working voltage (V)

Rated working current of closing coil (A)

Rated working current of opening coil (A)

Normal operating voltage range

AC, DC110

2.0

1.8 (2.6 for 40kA and above)

AC, DC220

1.0

0.9 (1.6 for 40kA and above)

Closing: 80% –110% of rated operating voltage

Opening: 65% –120% of rated operating voltage; and opening will not occur if less than 30% of rated operating voltage

Rated voltage

Rated power frequency withstand voltage (1 min)

Rated lightning impulse withstand voltage (peak value)

Rated frequency

Rated current

Rated short-circuit breaking current

Rated short-time withstand current (4s)

Rated peak withstand current

Rated short-circuit making current

Power frequency withstand voltage for secondary circuits (1 min)

Opening time

Closing time

Mechanical life

Breaking of rated short-circuit current

Permissible wearing accumulated depth for movable and fixed contacts

Rated operating voltage for closing

Rated operating voltage for opening

Rated voltage of energy charging motor

Rated power of energy charging motor

Energy charging time

Rated operating sequence

Notes: (1) Forced air cooling is required in the case of 4,000A/5,000A. (2) It can reach 125kA if confirmed by the manufacturer. (3)It can reach 137kA if confirmed by the manufacturer.

1250 1600

2000 2500

3150 4000(1) 5000(1)

125

(3)

(2)

(4)

(4) Need high mechanical life product, please contact Eaton Company

Overall dimensions of E-VAC circuit breaker (handcart-type)

300

400

550*

550

750**

205

202

277

377

508

536

637

698

725

598

586

280

295

Φ35

Φ49

Φ35

Φ49

Φ35

Φ49

Φ55

Φ79

Φ109

433

361

453

500

650

850

454

492

640

838

458

502

652

852

452

490

638

838

275

310

150

210

275

Rated short-circuit

breaking current

(kA)

25~31.5

25~40

31.5~40

31.5

40~50

Rated

current

(A)

630

1250

630

1250

630

1250

1600

2000

1250~2000

2500

3150

2500~5000

Width of

cabinet

(mm)

550

600/650

800

1000

Notes: Forced air cooling is needed in the case of 4,000A/5,000A. *Included if the breaking current is 40kA. **Included if the breaking current is 50kA.

Technical parameters and drawings of products in this catalogue are subject to modification without prior notice, please confirm with Eaton before you place order.

Caution

计数器

分合指示

分闸按钮

弹簧储能

合闸按钮

型号

电压

Lighting impulse withstanding voltage

雷电冲击耐受电压

频率

电流

短路持续时间

短路开断电流

直流分量

固封型真空断路器

制造年/编号

Cable-charging breaking current

电缆充电开断电流

Voltage for closing

合闸电源电压

Voltage for opening

分闸电源电压

Operation sequence

操作顺序

Classification

分级

Mass

质量

Standard

执行标准

E-VAC

12kV

75kV

50Hz

630A

25kA

50%

2020/10005

25A

220V DC

0-0.3s-C0-180s-C0

E2/C2/M2

165 kg

GB1984-2014 Back-to-back capacitor bank-breaking current

背对背电容器组开断电流 400A

Voltage for motor

储能电机电源电压

220V DC

在安装、使用和维护前，请仔细阅读安装使用说明书。

安装使用说明书编号：

手动储能

Contact

Status Charging

Spring

Counter

Trip

Manual

Charge

READ INSTRUCTION BOOK BEFORE

INSTALLING , OPERATING OR

MAINTAINING THIS DEVICE.

安装，操作或者维护设备前，

请参阅设备说明书

E-VAC

DISCHARGE

E-VAC medium voltage vacuum circuit breaker

Travel 8~11

E-VAC medium voltage vacuum circuit breaker

Overall dimensions of E-VAC circuit breaker (fixed type)

Overall dimensions of E-VAC fixed vacuum circuit breaker (phase spacing: 210)

Y1\\Y2

III

555

551

614

437

449

71.5

237

252

275

310

Rated

short-circuit

breaking

current (kA)

25~31.5

31.5~40

Rated current

(A)

630~1250

1250

1600

2000

1250~2000

Y1, Y2

I II Ⅲ

Y1, Y2 Y2

计数器

分合指示

分闸按钮

弹簧储能

合闸按钮

型号

电压

Lighting impulse withstanding voltage

雷电冲击耐受电压

频率

电流

短路持续时间

短路开断电流

直流分量

固封型真空断路器

制造年/编号

Cable-charging breaking current

电缆充电开断电流

Voltage for closing

合闸电源电压

Voltage for opening

分闸电源电压

Operation sequence

操作顺序

Classification

分级

Mass

质量

Standard

执行标准

E-VAC

12kV

75kV

50Hz

630A

25kA

50%

2020/10005

25A

220V DC

0-0.3s-C0-180s-C0

E2/C2/M2

165 kg

GB1984-2014 Back-to-back capacitor bank-breaking current

背对背电容器组开断电流 400A

Voltage for motor

储能电机电源电压

220V DC

在安装、使用和维护前，请仔细阅读安装使用说明书。

安装使用说明书编号：

手动储能

Contact

Status Charging

Spring

Counter

Trip

Manual

Charge

READ INSTRUCTION BOOK BEFORE

INSTALLING , OPERATING OR

MAINTAINING THIS DEVICE.

安装，操作或者维护设备前，

请参阅设备说明书

E-VAC

DISCHARGE

Depth Depth Depth Depth

Depth

Overall dimensions of E-VAC circuit breaker (fixed type)

Overall dimensions of E-VAC fixed vacuum circuit breaker (phase spacing: 275)

Z1\\Z2

628

678

Rated

short-circuit

breaking

current (kA)

31.5

40~50

Rated

current (A)

2500

3150

2500~5000

Ⅳ Ⅴ

Z1 Z2 Z1 Z2

计数器

分合指示

分闸按钮

弹簧储能

合闸按钮

型号

电压

Lighting impulse withstanding voltage

雷电冲击耐受电压

频率

电流

短路持续时间

短路开断电流

直流分量

固封型真空断路器

制造年/编号

Cable-charging breaking current

电缆充电开断电流

Voltage for closing

合闸电源电压

Voltage for opening

分闸电源电压

Operation sequence

操作顺序

Classification

分级

Mass

质量

Standard

执行标准

E-VAC

12kV

75kV

50Hz

630A

25kA

50%

2020/10005

25A

220V DC

0-0.3s-C0-180s-C0

E2/C2/M2

165 kg

GB1984-2014 Back-to-back capacitor bank-breaking current

背对背电容器组开断电流 400A

Voltage for motor

储能电机电源电压

220V DC

在安装、使用和维护前，请仔细阅读安装使用说明书。

安装使用说明书编号：

手动储能

Contact

Status

Charging

Spring

Counter

Trip

Manual

Charge

READ INSTRUCTION BOOK BEFORE

INSTALLING , OPERATING OR

MAINTAINING THIS DEVICE.

安装，操作或者维护设备前，

请参阅设备说明书

E-VAC

DISCHARGE

E-VAC medium voltage vacuum circuit breaker

(Position 1)

Position 1

(Position 2)

Position 2

Depth

The diagram shows the circuit breaker in the test position, open, and energy discharged states

Secondary wiring of E-VAC vacuum circuit breaker control (handcart-type)

E-VAC medium voltage vacuum circuit breaker

Motor circuit Closing circuit Lockout circuit Opening circuit

Overcurrent release (Phase A) Overcurrent release (Phase C) Overcurrent release (Phase B)

Optional wiring installations: Jumper State Jumper

With Anti-jump With Lockup Without Lockup With Lockup Without Lockup

JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9

√

/ Selection of operating power supply: Operating Power Supply Jumper

AC/DC 220V AC/DC 110V

JP10 JP11

√

Notes: “/” stands for open; “√” stands for closed.

HQ: TQ: R0~R1: M: Closing coil Opening coil Resistance Energy charging motor Note: When DC power supply is used, the polarity in the dotted boxes must be the same. S9: Auxiliary switch (switched when the circuit breaker is at the working position) S8: Auxiliary switch (switched when the circuit breaker is at the testing position) S2: Auxiliary switch S1: Auxiliary switch (switched after full energy charging of the closing spring) QF: Auxiliary switch (switched upon closing or opening operation) V2~V4: Bridge rectifier (off for AC) Y1: Lockup coil (optional) K0: Anti-jump relay (optional) Y7~Y9: Indirect overcurrent release coil (optional) JP1~JP11: Jumper

Configuration Without Anti-jump

The diagram shows the circuit breaker in the opening state and the state of energy discharged

E-VAC vacuum circuit breaker secondary control wiring (fixed type)

E-VAC medium voltage vacuum circuit breaker

Optional wiring installations: Jumper State Configuration Jumper

With Anti-jump With Lockup Without Lockup With Lockup Without Lockup

JP8 JP9

√

/ Note: “/” stands for open; “√” stands for closed. Notes: 1. When DC power supply is used, the polarity in the dotted boxes must be the same. 2. During installation and commissioning, ensure that S3 can be switched when mechanical interlocking is enabled. Selection of operating power supply: Jumper Operating Power Supply AC/DC 220V AC/DC 110V JP10 JP11

√

HQ: Closing coil TQ: Opening coil M: Energy charging motor S2: Auxiliary switch S1: Auxiliary switch (switched after closing spring stores energy) S3: Auxiliary switch (switched on after mechanical interlock is enabled and switched off if mechanical interlock is disabled) QF: Auxiliary switch (switched upon closing or opening operation) K0: Anti-pumping relay (optional) RO~R2: Resistance Y7~Y9: Indirect overcurrent release coil (optional) Y1: Lockup coil (optional) V2~V4: Bridge rectifier (off for AC) JP8~JP11: Jumper

Motor circuit Closing circuit Lockout circuit Opening circuit

Mechanical interlock

Overcurrent release (Phase A) Overcur- rent release (Phase C) Overcur- rent release (Phase B)

Without Anti-jump

2500

2000 2500 3150

1250 1600 2000 2500 3150 4000* 5000*

E-VAC vacuum circuit breaker ordering guide

1. Circuit breaker model

2. Parameters of E-VAC vacuum circuit breaker

3. Technical parameters of spring operating mechanism

4. Optional configuration (standard configuration includes anti-jump device; if anti-jump device is to be switched off, please specify)

□E-VAC (handcart type) □E-VAC (fixed type)

Rated Short-circuit

Breaking Current (kA)

31.5

Rated Working Current (A)

630 1250

630 1250 1600

1250 1600 2000

□

□ □

□

1000

Forced air cooling is required in the case of * 4,000A/* 5,000A

275 25

31.5

□

□ □

□

□ □

□

□ □

□ □ □

□

□ □ □

□

Opening power supply (V)

Closing power supply (V)

Power supply of energy charging motor (V)

DC110 AC110 DC220 AC220

□

Overcurrent release

Closing lockout

Position lockout

Anti-jump relay

Undervoltage release

Operating handle

□

□ □

3-phase overcurrent A

Note: 产品技术参数如有修改，恕不另行通知，请在订货前与伊顿公司确认。

如需高关合（开断能力40kA时关合能力达到125kA，开断能力50kA时关合能力达到137kA）或

高海拔（海拔高度超过 1000m）的断路器，请在订货前与伊顿公司确认。

Cabinet

Width (mm)

800

Phase Spacing of

Circuit Breaker (mm)

210

E-VAC medium voltage vacuum circuit breaker

Technical parameters of the product are subject to the change without notice. Please confirm this with Eaton before ordering.

If you need high closing circuit breaker (the closing capacity reaches 125kA when the breaking capacity is 40kA; and the closing

capacity reaches 137kA when the breaking capacity is 50kA) or high-altitude circuit breaker (altitude over 1,000m), please confirm it

with Eaton before ordering.

Energizing aworld

that demands more.

We deliver:

Electrical solutions that use less energy, improve power reliability and make the

places we live and work safer and more comfortable

Hydraulic and electrical solutions that enable machines to deliver more

productivity without wasting power

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and help airports operate more efficiently

Vehicle drivetrain and powertrain solutions that deliver more power to cars,

trucks and buses, while reducing fuel consumption and emissions

•

Discover today’s Eaton.

Eaton is a registered trademark

of Eaton Corporation.

All trademarks are property of their

respective owners.

Printed in China

CHICA2020010A_CN (12-2025)

Eaton Corporation

No.3, Lane 280, Linhong Road,

Changning District,

Shanghai, China 200335

www.eaton.com.cn

Eaton is an intelligent power management company dedicated to

protecting the environment and improving the quality of life for people

everywhere. We make products for the data center, utility, industrial,

commercial, machine building, residential, aerospace and mobility

markets. We are guided by our commitment to do business right, to

operate sustainably and to help our customers manage power ─ today

and well into the future. By capitalizing on the global growth trends of

electrification and digitalization, we’re accelerating the planet’s transition

to renewable energy sources, helping to solve the world’s most urgent

power management challenges, and building a more sustainable society

for people today and generations to come.

Eaton was founded in 1911 and has been listed on the New York Stock

Exchange for more than a century. We reported revenues of $23.2

billion in 2023 and serve customers in more than 160 countries. Eaton

entered the Chinese market in 1993 and has grown significantly since

then. In 2004, Eaton moved its Asia-Pacific headquarters from Hong

Kong to Shanghai. Today, Eaton has nearly 8,000 employees and 19

manufacturing facilities in China.

For more information about Eaton China, visit www.eaton.com.cn

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