Máy cắt cao thế Siemens loại “3AP DCB Disconnecting Circuit Breaker” phù hợp cho những ứng dụng điện áp từ 145 kV đến 420 kV!

3AP DCB Disconnecting Circuit Breaker

3AP DCB Disconnecting Circuit Breaker Siemens

Technical Data

For 145 kV and 420 kV applications

In switchgear, isolating distances in air combined with circuit breakers are used to protect the circuit state in the grid. Siemens has developed a device in which the isolating distance has been integrated in the SF6 gas compartment in order to reduce external environmental influences. The DCB (Disconnecting Circuit Breaker) is used as a circuit breaker and additionally as a disconnector – two functions combined in one device.

The DCB was developed on the basis of a higher-rated standard 3AP circuit breaker to provide the higher dielectric properties required. Due to the SF6-insulated disconnector function there is no visible opening distance anymore. The proper function of the kinematic chain has been most thoroughly verified. The closest attention was paid to developing a mechanical interlock which guarantees that the circuit breaker remains in the open position.

When this mechanical interlock is activated, it is impossible to close the breaker. The current status of the DCB can also be monitored electrically and is shown by clearly visible position indicators. Up to voltages of 145 kV, an additional air-insulated earthing switch could be mounted onto the supporting structure. Its earthing function has been implemented by a well-established earthing switch with a Ruhrtal designed maintenance-free contact system.

The disconnecting circuit breakers are type-tested according to class M2 and C2 of IEC 62271-108, a specific standard for combined switching devices. By combining the strengths of our well proven product portfolio, we can provide a new type of device which fulfills customers’ needs for the highest reliability and safety, while saving space and costs at the same time.

Báo giá thiết bị Siemens

Sản phẩm tham khảo:

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