Calculation Method Of Setting Current Of Low Voltage Circuit Breaker

The instantaneous action time of Lv Pole Mounted Circuit Breakers is 0.02S, which is generally 1.7~2
The action time can be found in the protection curve table in the low-voltage pole-mounted circuit breaker sample. For example:
The protection curve of HSM1-125, 160 is t0.02s
The protection curve of HSM1-250~800 is t0.02s
Idz—Rated current of instantaneous (short delay) release of low-voltage pole-mounted circuit breaker (A)
Note: In the design, it is generally set according to (12~14) In; that is, (12~14) times the rated current of the motor.