Vacuum circuit-breaker series BP type BP6K are designed for switching electrical circuits in normal and emergency modes in three-phase alternating current networks of 50 (60) Hz frequency and 6 kV rated voltage for ungrounded or partially grounded neutral systems.
BP6K circuit-breaker are mainly used for replacement of VEM-6 electromagnetic circuit-breakers in K-X and K-XXV switchgears as well as circuit-breakers in KEE-6 switchgears at thermal and nuclear power plants.
Vacuum circuit-breakers series BP are ideally suitable for switching and protection operations in MV grids. Circuit-breakers series BP are used for switching loads of any types at rated currents of up to 3150 A and breaking currents of up to 40 kA. Circuit-breakers series BP are designed on the basis of the unified design concept, namely: using cast epoxy compound poles; using the versatile electromagnetic drive, which acts as a magnetic latch and is controlled by an electronic block housed in the circuit-breaker frame.
Specifications:
- Rated voltage (kV): 6
- Rated current (A): 1600, 2000, 3150
- Rated breaking capacity (kA): 40
- Peak withstand current (kA): 128
- Mechanical lifetime: 30000 CO cycles
- Electrical lifetime: 30000 CO cycles
- Electrical lifetime at rated breaking current: up to 50 O cycles
Design
All circuit-breakers series BP type BP6K 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 BP6K shaft is connected via insulating tie-rods with vacuum interrupters and when turning, it controls circuit-breaker position contacts for external auxiliary circuits. Plate-type pressing springs are installed in insulating tie-rod bushings.
Елементи підстанцій