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How to check the no-load power transmission of the inductor of the induction melting furnace?

How to check the no-load power transmission of the inductor of the induction melting furnace?

Without putting metal materials in the furnace or putting iron crucible molds in the furnace, power on the inductor, check the electrical switch action, line vibration and heat generation, instrument indication, electrical control line action, as well as the vibration of the inductor itself, and turn-to-turn insulation Is the condition normal? For the sake of safety, the specified voltage is 3 to 5 grades from low to high to transmit power until the rated voltage is continuously transmitted for about 30 minutes. Note that at this time, water should be passed through the sensor for safety.