The importance of the zero line in the power supply system

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In fact, the role of the zero line in the power supply system is very large:

1. It is the power circuit of single-phase 220V power equipment.

2. If the device with protection zero is faulty, because the zero line impedance is small, a large short circuit current will cause the protector to act quickly, thus quickly cutting off the power supply. If the neutral wire is broken, the protective device that is connected to zero will be charged.

3. When the three-phase load is unbalanced, the unbalanced current will return to the neutral point of the transformer through the neutral line, so that the 380V line voltage is 220V phase voltage.

Basically balanced. Otherwise, if the neutral line is broken, the two-phase load is connected in series to form a loop, and the voltage value can be calculated according to Ohm's law. The low voltage phase does not work, and the high voltage phase will burn the appliance.

I don't know if I understand it or not?

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