Instructions For Short-circuit Current Verification Of Low-voltage Pole-mounted Circuit Breakers

For example, in the previously mentioned line with a transformer capacity of 1600kVA, the possible short-circuit current is about 43kA. This is calculated based on the assumption that the distance from the transformer is 5m and the internal resistance of the knife switch, mutual inductor and Lv Pole Mounted Circuit Breakers are all considered to be zero (the short-circuit current is therefore larger than the actual situation).