Short circuit current at 500A

Short circuit current at 500A

For short circuit current level 500A, both
anode and cathode root contact delay longer in the contact region before it moves
slowly off from the contact region towards into the arc chamber. At the short circuit
current level 2000A, the arc root moves from the contact region faster than that of
1400A and 500A.

Ref: Slow Contact Opening Circuit Breakers