Description
The 40.5kV VMD5 high voltage vacuum circuit breaker is a three-phase ac 50Hz electrical switch which operates at the rated voltage of 40.5kV. This indoor vacuum CB meets such authoritative standards as the GB1984-1989 high voltage circuit breaker, JB3855-1996 3.6 - 40.5kV indoors high voltage vacuum circuit breaker and the IEC standard. It could be applied in various areas, like power plants, transformer substations and other working occasions that require frequent operations.

Features of the 40.5kV High Voltage Circuit Breaker
1. This 40.5kV indoor safety switch is the 3rd generation vacuum circuit breaker elaborately designed and manufactured by Minde Electrical;
2. The high voltage vacuum CB employs the latest embedded poles of which the extremely low-resistance vacuum interrupter and the main circuit are sealed by the epoxy resin. Hence, it enjoys a greater insulating property;
3. Equipped with an improved drive system-the gear drive system, the 40.5kV electrical switch operates in a more reliable way;
4. The complete anti-misoperation interlock of this circuit breaker could effectively protect the operator and your equipment;
5. Owing to its scientific and advanced design, this new generation high voltage circuit protecting device, completely meeting the requirements for an automatic reclosing lock, is highly qualified for a working occasion where frequent operations or repeated opening and closing of circuits are needed;
6. This indoor three phase ac 50Hz circuit breaker has passed the type tests of Guobiao standards (GB) and IEC standard, as well as the national appraisals;
7. Its mechanical endurance could be up to 30,000 times;
8. The high voltage electrical switch has been exported to over 26 countries around the world.

Wide Application

This 40.5kV high voltage circuit breaker, benefited from its tulip contacts which are made of unique materials, could be applied in a wide range of areas, such as the power distribution, hydropower plants, wind power plants, thermal power plants, oil and gas plants, offshore operations, and urban infrastructure constructions.

Particularly, its embedded pole, a latest product made by the APC technique, enables this indoor high voltage vacuum circuit breaker to operate smoothly by overcoming such harsh conditions as the deserts in Middle East, extremely cold areas in Siberia of Russia and the plateau areas in western China.

Spring Operating System

1. All the circuit control boards of our products employ a modular design which ensures a reliable electrical connection and makes it easier for you to replace components inside.
2. 80% components of the 40.5kV circuit breaker are plated with Ni-P alloy which significantly improves the parts' resistance to erosion and ensures a stable quality of them.
3. Both the tripping coil and closing coil of this high voltage circuit breaker are designed with an enclosed structure which protects them from moistures.
4. The trip unit and closing unit of this safety switch, enjoying simple structures and reliable operating principles, could not only avoid some malfunctions, for example, the breaker can not keep closed or fails to break, but also lower the power needed for a tripping.
5. Of an optimized integral structure, this 40.5kV circuit breaker employs a gear drive system instead of the chain drive, which enables it to operate in a far more stable way.
6. This spring operation mechanism enjoys a simple overall structure and reliable operating principles. Meanwhile, components employed by each type of the electrical switch are standard products that could be used by its counterparts. Since this mechanism is independently designed and manufactured by our company, we could provide custom products to you according to you specific requirements.

Unique Gear Driven System

As a new generation high voltage indoor circuit protection device, the 40.5kV high voltage circuit breaker we provide to you employs a unique gear drive system-the gear drive system instead of the traditional chain-wheel drive system which the driven system runs more smoothly and stable, and mechanical life is much higher. Therefore, it operates more smoothly and stably and enjoys a longer mechanical lifespan.

Circuit Control Board

The difference between the circuit control board of this 40.5kV indoor vacuum circuit breaker and that of the traditional vacuum breaker, medium voltage breakers lies in the mini fuses the former is added with. Those additional fuses, cheap and easy to replace, could effectively protect the equipment by preventing components from being burnt. In order to satisfying your detailed requirements, we could provide custom circuit control board to you as long as you inform us of your specific needs.

Successful Application of the 40.5kV high Voltage Circuit Breaker

Since its establishment, Mingde Electrical has been a reliable supplier of electrical power equipment for the steel and nonferrous industrial companies from which it has gained trusts and favors for its quality products and professional services. Till now, more than 200 units of this 40.5 kV indoor electrical switch have been provided to our customers. For instance, the Rizhao steel group Co., Ltd. has applied the circuit breakers in their factory which play an important role in the factory’s power supply.

Technical Parameters of the 40.5kV high Voltage Circuit Breaker

Boundary Dimensions Figure of the 40.5kV High Voltage Circuit Breaker

boundary dimension figure of the handcart type 40.5kV indoor vacuum circuit breaker (phase space: 300mm)

Please be noted: displayed above are the dimension figures of part of our products. If you would like to see more, please contact us.