Indoor vacuum circuit-breakers series VBC-35 with electromagnetic drive and external epoxy compound insulation of poles are designed for switching electrical circuits in normal and emergency modes of ore-thermal, electric arch and other electrical installations with frequent switching operations.
Specifications:
- Rated voltage (kV): 35
- Rated current (A): 1600
- Rated breaking capacity (kA): 20
- Peak withstand current (kA): 80
- Mechanical lifetime: 50000 CO cycles
- Electrical lifetime at rated currents: 20000 CO cycles
- Electrical lifetime at rated breaking currents: 20000 CO cycles
Design
The circuit-breaker is a switching apparatus with three poles mounted on the common frame and controlled by the electromagnetic drive installed inside this frame. The first pole houses two interrupting modules connected in series, and the second and third poles house one module each. Each pole houses: supporting insulator, shields for ensuring the required electrical strength among poles, insulating tie-rods transmitting motion from the drive to moving contacts of interrupters and to the cover. The frame houses also an indicator of open and close position. Current-conducting buses are connected to current collectors.
10 kV Vacuum Circuit-Breakers
