How big is the circuit breaker of 150KW equipment?

The rated current of 150KW is close to 300 current, and it is better to choose 350A greater than the rated current of full load.

Method:

Step 1: Calculate the current, that is, the rated current of the equipment = rated power/rated voltage/1.732.

Step 2: Considering the maximum current that the load may pass, multiply the rated current by (1.5-2) overcurrent coefficient.

Step 3: Refer to relevant samples and select the current value close to that calculated in step 2.