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Why does the external indicator light turn on when it is powered?

answer:


When there is an external indicator light, the total compensation indicator is 380V; the capacitor terminal is connected to 3 and 4 to 2 indicator lights, the other end of the power supply must be connected to UC, the supplementary indicator light is 220V, and the terminals 3, 4, and 5 are respectively connected to the indicator light. The other end must be connected to the zero line UN