消弧线圈是一个具有铁心的可调电感线圈，当由于电气设备绝缘不良、外力破坏、运行人员误操作、内部过电压等任何原因引起的电网瞬间单相接地故障时，接地电流通过消弧线圈呈电感电流，与电容电流的方向相反，将接地电流补偿成较小的数值或接近于零，以防止电弧重燃，从而有效地降低过电压值。消除了接地处的电弧以及由此引起的各种危害，自动消除故障，不会引起继电保护和断路器动作，大大提高了电力系统的供电可靠性。

Arc suppression coil is a core of adjustable inductance coil, when the electrical equipment insulation fault, external force damage, operation personnel wrong operation, such as internal overvoltage any moment when single-phase earth fault causes of power grid, the grounding current through the arc suppression coil inductance current, contrary to the direction of the capacitive current, grounding current compensation into smaller numerical or close to zero, in order to prevent the arc reigniting, effectively reduce overvoltage value. Eliminates the meet is located in the arc, and the resulting harms, automatic eliminate the fault, does not cause relay protection and circuit breaker action, greatly improving the power supply reliability of power system.