How to determine the working voltage of resistance furnace

    In general, 220V series or parallel series power supply is adopted for resistance heating elements with power below 25kW, and 380V star or triangle line power supply is generally adopted for electric heating elements of resistance furnaces with power between 25kW and 75kW. For resistance furnaces with a power of more than 75kW, the power supply modes of electric heating elements are relatively diversified. The purpose is to ensure that the power of each heating element is appropriate, which is convenient for element manufacturing and control of furnace power and temperature.