Low Voltage Column Mounted Circuit Breaker Upper And Lower Incoming Lines

Since the moving contact is mostly linked by a common shaft, and then closely connected to the soft connection and release, if the insulation between them is reduced due to ionized gas or conductive dust generated by short circuit disconnection, it is easy to cause phase-to-phase short circuit. For Lv Pole Mounted Circuit Breakers that can only be connected from above, if it must be connected from below due to installation conditions, the short-circuit breaking capacity must be reduced, generally by 20%-30%. The expected short-circuit current is reduced more for large ones and less for small ones.