Powering business worldwide

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.

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's range of SF6 free switchgear for Medium Voltage

An Eaton Green Solution

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 lEC, 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 circuit breaker 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.

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;

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.

The product is proudly certified under the China Environmental Labeling Product Certification (Type Il) 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.

Product model

Operating conditions

• 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).

Technical features

• 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.

Humidity

• 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.

Applications

• Chemical industry

• Substation

• Petroleum industry

• Cement industry

• Pipeline industry

• Automobile industry

• Offshore mining

• Shipbuilding industry

• Power plant

• Paper industry

• Textile and food industry

• Metallurgical industry

• Opencast mine

Technologies make history

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.

E-VAC vacuum circuit breaker almost needs no maintenance

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.

Optional Accessories

Energy charging handle

Handcart cranking handle

Lifting handcart

The best choice for medium voltage power distribution system control and protection

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.

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

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

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

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

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

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

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

Note e t e d e d ame pui se n e 'ss e oitee ed

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

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

E-VAC vacuum circuit breaker ordering guide

1. Circuit breaker model

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

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)

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。

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 a world

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

• Aerospace solutions that make aircraft lighter, safer and less costly to operate, 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 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