Reactor is an electrical apparatus that relies on the inductive reactance of the coil to block the change of current. It can be divided into 7 types according to the use
① Current limiting reactor. Series connected in power circuit to limit the value of short circuit current.
② Shunt reactor. Generally, it is connected between the end of EHV transmission line and ground to compensate reactive power.
③ Communication reactor. It is also called wave trap. It is connected in series in the transmission line which is also used as the communication line to block the carrier signal and make it enter the receiving equipment.
④ Arc suppression reactor. Also known as arc suppression coil. It is connected between neutral point and ground of three-phase transformer to supply inductive current when one phase of three-phase power grid is grounded, so as to compensate capacitive current flowing through grounding point, so that arc is not easy to ignite, so as to eliminate over-voltage caused by repeated arc reburning.
⑤ Filter reactor. It can be used to reduce the amplitude of current ripple in rectifying circuit. It can also be used to form a resonant circuit with capacitor to eliminate the voltage or current of a certain harmonic in power circuit.
⑥ Electric furnace reactor. It is connected in series with the furnace transformer to limit its short-circuit current.
⑦ Start the reactor. It is connected in series with the motor to limit its starting current.
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