2020年2月20日星期四

Electric Arc Furnace Reactor

Electric Arc Furnace

Electric Arc Furnace Reactor


In order to stabilize the arc and limit the short-circuit current, a reactance capacity of about 35% of the transformer capacity is needed to be connected in series into the main circuit of the transformer. For large-scale arc furnace transformers, it has a reactance value that can meet the needs, without an external reactor; for a transformer less than 10MVA, the reactance does not meet the requirements, it needs an external reactor at the primary side. The structural characteristics of the reactor are as follows: even though the short-circuit current is passed, the iron core will not occur magnetic saturation.

The reactor can be installed inside the furnace transformer, which is called an internal type; it can also be made into an independent reactor installed outside the transformer, which is called the external type.

Generally, the furnace transformer should be connected in series with the reactor, so that the sum of short-circuit impedance and reactor reactance of the transformer can reach 0.33 ~ 0.5 standard value (based on the rated capacity of furnace transformer).







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