The power frequency AC voltage of 220 V and 380 V in engineering refers to its maximum value (a), instantaneous value (b), average value (c) and effective value (d)

The power frequency AC voltage of 220 V and 380 V in engineering refers to its maximum value (a), instantaneous value (b), average value (c) and effective value (d)

The effective value is defined according to the thermal effect of the current. Let an AC current and a DC current respectively pass through the resistance with the same resistance value. If the heat generated in the same time is equal, then the value of the constant current is called the effective value of the AC
380V and 220V refer to the effective value of voltage, not the average value of voltage, because part of the current is consumed in the process of current transmission

Find out the maximum and minimum coil power of 220 V and 380 V AC contactor, and see clearly the coil power

Your question is not professional. The coil power of AC contactor is related to the capacity of the contactor, but not much to the voltage. It can be calculated according to the technical data on the coil. Generally speaking, the coil power of AC contactor below 60A will not exceed 5W
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