Total power of one phase (single phase) of three-phase electricity: the total power of three-phase electricity on the line is divided by 3, plus the total power of single phase on the phase line;

When calculating the power supply capacity of three-phase electricity (such as transformer size, conductor configuration, switch setting, etc. ), the total power of three-phase electricity should be calculated separately and then multiplied by the largest one to 3? As the total power calculation.

Example: "The power of 380V equipment adds up to 50KW, and the power of other single-phase equipment adds up to 60KW, so the total power is 1 10KW"? Is correct.

The statement "50+60/3=70KW" is incorrect. No matter how the 60kW single-phase load is configured (distributed to each phase or concentrated in a certain phase), the power supply system should provide it with 60kW power input, and 50+60 = 1 10kW is the output power of the distribution cabinet.