6-10 kV vacuum circuit-breakers of series BP1 are used in newly designed SMU and complete switchgears as well as for reconstruction of SMU and switchgear cubicles in use.
Rated voltage: 6-10 kV
Rated current: 630-1250 A
Specifications:
- Rated voltage (kV): 10
- Rated current (A): 630-1250
- Rated breaking capacity (kA): 20
- Peak withstand current (kA): 52
- Mechanical lifetime: 100000 CO cycles
- Electrical lifetime: 50000 CO cycles
- Electrical lifetime at rated breaking current: 100 O cycles
Design
All circuit-breakers series BP type BP1 consist of three poles with vacuum interrupters filled with cast epoxy compound and mounted on the circuit-breaker frame. The circuit-breaker electromagnetic drive fixing circuit-breakers in C and O positions on magnetic latches is housed in the circuit-breaker frame. The core of the electromagnetic drive is connected with the circuit-breaker shaft via connecting links. The circuit-breaker shaft is connected via insulating tie-rods with vacuum interrupters and when turning, it controls circuit-breaker position contacts for external auxiliary circuits. Almost in all circuit-breakers, plate-type pressing springs are installed in insulating tie-rod bushings. Control block schemes are realized by using PCBs housed in circuit-breakers series BP.
Елементи підстанцій