В10 kV vacuum circuit-breakers of series BPC-10 with spring and electromagnetic drives are designed for switching electrical circuits in normal and emergency modes in three-phase alternating current networks of 50 (60) Hz frequency and 6-10 kV rated voltage for ungrounded or partially grounded neutral systems.
BPC-10 circuit-breakers are designed to be used in indoor switchgears series KU10S of "ВС-РЗВА" production and switchgears of other manufacturers.
Specifications:
- Rated voltage (kV): 10
- Rated current (A): 630-4000
- Rated breaking capacity (kA): 20, 31.5, 40
- Peak withstand current (kA): 52, 80, 102
- Mechanical lifetime: up to 100000 CO cycles
- Electrical lifetime: up to 30000 CO cycles
- Electrical lifetime at rated breaking current: up to 100 O cycles
Design
Circuit-breakers consist of the following parts: auxiliary position contacts of the circuit-breaker and flag indicator, switching block, condenser discharging tumbler switch, control PCB, electromagnet, condenser, manually-operated switching-off device, meter, three poles, interlocking mechanism, shaft, frame and row of terminals.
Each circuit-breaker pole consists of an insulating tie-rode with a pressing spring mechanism, a flexible or sliding connection, upper and lower terminals, a vacuum interrupter and an insulating housing. Vacuum interrupters are filled with cast epoxy compound, which safely protects them from mechanical and electrical damage. The poles of circuit-breakers rated for 2500 A and 3150 A currents are fitted with a cooling radiator.
Елементи підстанцій