OP
Ponty Massive
Zs from the BRB would be the max reading for that circuit breaker in order for it to operating in time (ie 0.4 sec), however when taking these readings into account you should also take into consideration allowance for temp factor or use the rule of thumb of 80%.
Take your maximum allowed Zs and multiply by 0.8.
Is this what you mean?
Take your maximum allowed Zs and multiply by 0.8.
Is this what you mean?