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40.5kV 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.
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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.
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Eaton Electrical Sector
Eaton Electrical Sector, as the
largest business unit of Eaton
Group, has high reputation in the
manufacturing and services
regarding electrical control, power
distribution, industrial control, and
power quality. It also provides
excellent services and advance
products in research, design,
manufacturing, and applications.
Eaton Electrical Sector has a lot of
famous brands, e.g., Westinghouse,
Holec, Cutler-Hammer and
Powerware. Meantime, it inherits
and carries forward the
technologies and engineering
experience of those brands. Eaton
continues to insist on the traditions
behind those brands and will carry
forward their unique advantages to
provide customers in China and the
rest of the world with effective
solutions and services.
Eaton has been engaging in circuit
breaker manufacturing for more than
eight decades. Over the past eight
decades, Eaton has been a leader in
the global circuit breaker market in
terms of technology and philosophy.
Nowadays, the green world has strict
requirements on medium voltage
power switching. Lowered resistance
system configuration has imposed
stricter requirements on current
continuity and breaking capacity. The
requirements on compactness and
cooling are getting higher and higher.
The most ideal solution is a medium
voltage circuit breaker that is
environment friendly and capable to
switch on/off large currents reliably,
and does not need unreliable cooling
or forced air cooling.
Eaton integrates its vacuum
technology, design achievements, and
more than a century of rich
experience of Westinghouse,
Cutler-Hammer and Holec.
Eaton had been engaging in vacuum
interrupter R&D in the 1920s and
developing commercial vacuum
circuit breakers in the 1960s. So far, it
has accumulated more than 70 years
of experience in the design and
manufacture of circuit breakers and
switch cabinets.
E-VAC vacuum circuit breaker, which was elaborately designed and
manufactured by Eaton Electric Group, is an indoor medium voltage vacuum
circuit breaker employing encapsulation insulation. The product complies with
the national standard GB/T 1984 and international standard IEC 62271-100,
and is the best choice for control and protection of medium voltage
transmission and distribution systems. Eaton provides floor mounted
draw-out type and fixed type circuit breakers to meet varied needs of
customers. Having passed high-altitude tests, those products are suitable for
use in high-altitude areas.
Eaton is a leader in power
distribution
40.5kV E-VAC Medium
Voltage Vacuum Circuit Breaker
Product model
IEC/GB Circuit Breaker
Eaton Circuit Breaker Series Rated Voltage (KV) Rated Current (A)
Rated Short-circuit Breaking Current (kA)
Spring Operating Mechanism
E - VAC - 40.5 / T □ - □
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? The ambient temperature shall not be higher than 40℃ and not lower
than -15℃
(If the temperature exceeds this limit, please contact Eaton Company.);
? The altitude shall not be higher than 1,000m; If the altitude exceeds
1,000m please contact Eaton Company.
? The average relative humidity of the air shall not be greater than 95%;
the monthly average humidity shall not be higher than 90%; the
average saturated vapor pressure shall not be greater than
2.2×10-3MPa; and the monthly average vapor pressure shall not be
greater than 1.8×10-3MPa; It’s required to prevent condensation in
high-humidity environments.
? Max endurable earthquake intensity: Magnitude 8;
? Keep the product away from fire, explosion, serious pollution, chemical
corrosion, severe vibration and other hazards.
Operating environment: Product features
? High-end 3D computer-aided design (Pro-Engineer) and dynamic
simulation and optimization design (Pro-Mechanical).
? The optimized design of electromagnetic field distribution is capable to
minimize partial discharge and local overheating.
? State-of-the-art Eaton vacuum interrupter with high-performance
provides excellent large-current and high-breaking performance.
? With superior and reliable solid-sealed insulation performance, the
product has passed the condensation test, is suitable for reliable
operation in harsh environments, and has a larger creepage distance
and electrical clearance which are above the IEC and GB standards.
? Reliable grounding method ensures the grounding continuity of the
circuit breaker from the working position to the test position.
? High compatibility and multi-scheme design of the product is fully
compatible with various mainstream cabinets around the world.
? Rich and diverse accessory solutions can meet varied needs of
customers.
Encapsulated Pole
The best choice for medium voltage power distribution
system control and protection
Upper Outlet
Vacuum Interrupter
Flexible Coupling
Lower Outlet
Creepage Extender
The operating mechanism of the circuit breaker is a spring energy storage
mechanism with excellent performance, which is compact. It is equipped
with manual energy storage device and electric energy storage device, which
can realize the automatic reclosing function.
The circuit breaker is equipped with manual opening and closing operation
button, circuit breaker opening and closing position indicator, spring
mechanism energy storage status indicator,
switch operation times counter, shunt release, position auxiliary switch,
energy storage motor, shunt release, anti-pumping relay.
The following accessories can also be provided according to specific
requirements: undervoltage release
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.
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Main technical parameters of product
Item Unit Value
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 short-circuit making current(peak value)
Rated peak withstand current
Power frequency withstand voltage for secondary circuits (1 min)
Rated single/back-to-back capacitor bank breaking current (3)
Rated capacitor bank inrush making current (3)
Opening time(rated voltage)
Closing time(rated voltage)
Mechanical life
Breaking times of rated current
Breaking times of rated short-circuit current
Rated cable-charging switching current
Permissible wearing accumulated depth for movable and fixed contacts
Three-phase contact opening and closing asynchronism
Rated operating voltage for closing
Rated operating voltage for opening
Rated voltage of energy charging motor
Energy charging time
classification
Rated operating sequence
40.5
95(2)
185(2)
50/60
1250 1600 2000 2500 3150 4000A(1)
31.5/40
31.5/40
82/104
82/104
2000
630/400
20 (Frequency not greater than 4250 Hz)
20~50
35~70
10000(2)
10000(2)
30(2)
50
2
≤2
AC 110/220 DC 110/220
≤15
C2-E2-M2
O-0.3s-CO-15s-CO
kV
Hz
A
kA
kA
kA
kA
V
A
kA
ms
ms
times
times
times
A
mm
ms
V
V
V
s
Note: (1) Forced cooling is required for 4000A.
(2) For higher parameters, pls contact Eaton company.
(3) Rated parameters are provided only when required.
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Rated parameters of operating mechanism:
Technical parameters of switching electromagnet coil
Name
Rated working voltage (V)
Rated input power of motor (W)
Normal operating voltage range
Energizing time under rated working voltage
Name
Rated working voltage (V)
Rated working current of closing coil (A)
Rated working current of opening coil (A)
Normal working voltage range*
If you have any special needs, please contact us.
*≥2000A or 40kA
Parameters
Parameters
AC,DC220
80 (90*)
85%-110% of rated voltage
≤15s
AC,DC110
80 (90*)
85%-110% of rated voltage
≤15s
AC220, DC220
1.0
0.9 (1.6*)
AC110, DC110
2.0
1.8 (2.6*)
Closing: 80%-110% for rated operating voltage
Opening: 65%-110% for DC rated operating voltage; 85%-110% for AC rated operating voltage
Opening will not occur if less than 30% of rated operating voltage
Storage
Place the product in a dry and
ventilated place and keep it away
from serious pollution, chemical
corrosion, and severe vibration.
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Dimensions of withdrawable E-VAC circuit breaker(unit:mm)
Rated shortcircuit breaking current 25kA~40kA P A
280
300
440
892
1092
1292
840
1040
1240
718
758
1038
850
1050
1250
B M N
1250
1600
2000
?49
?55
?79
Rated current (A) Fixed contact G
Ground bar
Dimensions of withdrawable E-VAC circuit breaker(unit:mm)
Rated shortcircuit breaking current 31.5kA~40kA P A
300
440
1092
1292
1040
1240
758
1038
1050
1250
B M N
3150NC (1)
3150FC
?109
?109
2500 ?109
4000FC (2)
(1) 3150FC contain cooling rack.
(2) The 4000FC circuit breaker can be equipped with a fan. If needed, please contact us.
?109
Rated current (A) Fixed contact G
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Ground bar
Cooling rack(1)
P
280
300
440
840
1040
1240
718
758
1038
850
1050
1250
Included
Included
Not Included
\\
\\
Optional silicone sleeve and sealing plate
B M N L1, L2 Insulating Partition Option
Dimension and projection
direction can be customised
according to customer
requirements.
(1) 3150FC contain cooling rack.
(2) The 4000FC circuit breaker can be equipped with a fan. If needed, please contact us.
(3) If you need interface size, please contact us.
Dimensions of fixed E-VAC circuit breaker(unit:mm)
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Sealing plate(optional)
Insulating partition
Sealing plate(optional)
Rated Current(A)
1250~2000
2500~4000
X Y Z
40
64
40
43
80
100
A Direction
X 4-M12
Z
Y
Cooling rack(1)
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Internal electrical wiring diagram for withdrawable E-VAC circuit breaker
The diagram shows the circuit breaker in the test position, open, and energy discharged states Optional wiring installations: Jumper Jumper JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9
√
/
√
/
√
/
√
/
√
/
√
/
/
√
/
√
/
√
/
√
/
√
/
√
/
√
/
√
√
√
/
/
√
/
√
/ Operating power supply selection: AC/DC 220V AC/DC 110V JP10 JP11
/
√
/
√
Note: “/” stands for closed; “
√ ” stands for open.
HQ: Closing coil TQ: Opening coil R0~R1: Resistance M: Charging motor
Motor charging circuit Closing circuit Interlock circuit Opening circuit
With locking Without locking With locking Without locking
Configuration With anti- bounce Without anti-bounce Jumper state Operating power supply Note: When DC power supply is used, the polarity in the dotted boxes must be the same. S9: S8: S2: S1: QF: V2~V4: Y1: K0: JP1~JP11:Auxiliary switch (when the E-VAC circuit breaker is in the working position) Auxiliary switch (when the E-VAC circuit breaker is in the test position) Auxiliary switch Auxiliary switch (switched on after the closing spring is charged) Auxiliary switch (switched during closing or opening operation) Bridge rectifier (Canceled for DC) Interlock coil (optional) Anti-pumping relay (optional) Jumper
Internal electrical wiring diagram of fixed E-VAC circuit breaker
In the following figure, the E-VAC circuit breaker is opened and spring is not fully charged. Optional wiring installations: Operating power supply selection: JP8 JP9
/
√
/
√
√
√
/
/
Note: “/” stands for closed; “
√” stands for open. AC/DC 220V AC/DC 110V
JP10 JP11
/
√
/
√
With locking With locking Without locking Without locking With anti- bounce Without anti-bounce
Jumper
Configuration Jumper state Jumper Operating power supply
Note: 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 is switched reliably after the mechanical HQ: TQ: M: S2: S1: S3: QF: K0: RO-R2: Y1: V2~V4: JP8~JP11: Closing coil Opening coil Charging motor Auxiliary switch Auxiliary switch (switched on after the closing spring is charged) Auxiliary switch (switched on after mechanical interlock is enabled and switched off if mechanical interlock is disabled) Auxiliary switch (switched during closing or opening operation) Anti-pumping relay (optional) Resistance Interlock coil (optional) Bridge rectifier (Canceled for DC) Jumper
Motor charging circuit Closing circuit Interlock circuit Opening circuit
Mechanical interlock
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E-VAC vacuum circuit breaker ordering guide
2. E-VAC Embedded Serial Vacuum Circuit Breakers Parameters
3. Technical Parameters of Spring Actuator Mechanism
4. Optional Configuration (the standard configuration includes anti-pumping device;
in case you don’t want anti-pumping function, please indicate.)
□ E-VAC (Withdrawable) □ E-VAC (Fixed)
Rated Short Circuit
Breaking Current (kA)
Rated Operating Current (A)
Opening Power Supply (V)
Closing Power Supply (V)
Charging Motor Power Supply (V)
□ Closing Interlock Device
□ Position Interlock
□ Anti-pumping Relay
□ Under-voltage Tripper
□ Handle
Note: The product technical parameters are subject to change without further notice. Please confirm with Eaton before order.
Circuit Breaker Phase
Spacing (mm)
1. Circuit Breaker Model
□ 25
□ 31.5
□ 40
□ 1250
□ 1600
□ 2000
□ 2500
□ 3150
□ 4000
□ DC110 □ AC110 □ DC220 □ AC220
□ DC110 □ AC110 □ DC220 □ AC220
□ DC110 □ AC110 □ DC220 □ AC220
□
□
□
□
□Quantity required
V
V
V
V
□ 280
□ 300
□ 400
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 helping to solve the
world’s most urgent power management challenges and building a
more sustainable society for people today and generations to come.
Founded in 1911, Eaton has continuously evolved to meet the
changing and expanding needs of our stakeholders. With revenues of
nearly $25 billion in 2024, the company serves 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
Eaton is a registered trademark
of Eaton Corporation.
All trademarks are property of their
respective owners.
? 2025 Eaton Corporation
All Rights Reserved
Printed in China
CHICA20200XXX_EN
December 2025
Eaton Corporation
No.3, Lane 280, Linhong Road,
Changning District,
Shanghai, China 200335
www.eaton.com.cn
