Setting and selection of setting current of low voltage column mounted circuit breaker

A: Short circuit protection Idz==Kk1 Igd
Where: Igd—Starting current of the protected motor (A)
Kk1—Reliability coefficient, Lv Pole Mounted Circuit Breakers with instantaneous action time of 0.02S is generally taken as 1.35
Circuit breaker with instantaneous action time of 0.02S is generally taken as 1.7~2