Single-pole circuit-breakers series BP27NS are used as component parts for blocks of complete switchgears series KRP(B)-27,5 in traction substations, switching stations and points of parallel connection of railroad sections contact line as well as for extension of existing substations and replacement of outdated air and oil circuit-breakers at them.
Specifications:
- Rated voltage (kV): 27.5
- Rated current (A): 1600
- Rated breaking capacity (kA): 25
- Peak withstand current (kA): 64
- Mechanical lifetime: 30000 CO cycles
- Electrical lifetime at rated currents: 30000 CO cycles
- Electrical lifetime at rated breaking currents: 30 O cycles
Design
Circuit-breakers series BP27NS consist of four main parts, namely:
- a frame housing an electromagnet
- a cubicle housing control PCBs and a manual switch-off mechanism
- a supporting frame with four mounting holes
- a pole consisting of insulating envelopes with organosilicon insulation and a vacuum interrupter
External finning and internal insulation of poles are solid-cast, including the vacuum interrupter casting. The creepage distance of external insulation is increased up to the III pollution level.
10 kV Vacuum Circuit-Breakers
