4.2. Feeder cabinet РУ-600Л-УХЛ4

Manufacturer: Zhejiang Changchun Electrical Appliance Co., Ltd

The purpose of the feeder cabinet is to supply power to the contact network on the cable line. The main circuit is equipped with a DC fast circuit breaker, a bypass bus isolation switch and a ground isolation switch. The repair work is carried out with a separate ground isolation switch.

The cabinet has a bypass isolation switch connected to the backup bus, and the fast switch and the backup bus isolation switch are "interlocked".

In the case of short-time overload, the fast circuit breaker and controller have the following protection functions:

Current rate of change protection

Current incremental protection

Current quick break protection

Current delay protection

Thermal overload protection

Current integral protection

Backflow protection

Overvoltage protection

Line test

Reclosing

And other functions.

Basic technical parameters of fast circuit breaker DS16-25/18:

Same as 4.1.

Basic technical parameters of spare isolation switch HD18-20/18:

Manufacturer: Zhejiang Changchun Electrical Appliance Co., Ltd

Rated voltage: 1800V

Rated current: 2000A

Power frequency withstand voltage: 5.5kV 1min

Short-time withstand current capability:

50kA/71kA(T=250ms)

Mechanical life: 20000 times, 120 times/hour

Basic technical parameters of grounding isolation switch HD18-10/18:

Rated voltage: 1800V

Rated current: 1000A

Power frequency withstand voltage: 5.5kV 1min

Short-time withstand current capability:

50kA/71kA(T=250ms)

Mechanical life: 20000 times, 120 times/hour