Reactive power and harmonic can decrease power network quality and traditional compensators with contactor switch have some drawbacks.
由于存在无功功率和谐波，从而引起电网质量下降，传统的接触器投切补偿电容器存在诸多不足之处。
Mating corresponding vacuum contactor switch is for electric power, metallurgy, mine, chemical controlling and protecting, it is suitable for location that has bad load and frequent operation.
配套相应的真空接触器开关可用于电力、冶金、矿山、化工等部门的配电系统作控制和保护，特别适合投切恶性负载和需频繁操作的场所。
Use relays, contactor, button, air switch and travel switch etc low-voltage constitute control circuit called relay contact control circuit.
使用继电器、接触器、按钮、空气开关、行程开关等低压电器构成的控制电路称为继电接触控制电路。
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