Electric Arc Furnace transformer refers to the power supply used for various metal and ore smelting, heat treatment, alloy making, electric slag return furnace, and other
Electric Arc Furnaces. The
Arc Furnace transformer is one of the main electrical equipment of the arc furnace. Its function is to reduce the input high voltage of up to 10-110kV (or even higher) to 100-1200V before outputting, generating a large current to power the arc furnace.
The load of the electric arc furnace transformer varies over time, and the current fluctuates greatly, especially during the melting period. The electric arc furnace transformer is often subjected to peak loads with high surge currents. Compared with general power transformers, arc furnace transformers have the following characteristics:
(1) The transformer ratio is high, with a high primary voltage and a low secondary voltage.
(2) The secondary current is high, reaching several thousand to one million amperes.
(3) The secondary voltage can be adjusted to meet the needs of the smelting process.
(4) The overload capacity is large, requiring the transformer to have a 20% short-term overload capacity, which will not affect the lifespan of the transformer due to general temperature rise.
(5) It has high mechanical strength and can withstand the mechanical stress caused by impulse current and short-circuit current.
(6) The maximum temperature during transformer operation is less than 95 ℃.
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