What is a Selector switch?

A selector switch is a switch that can collectively turn on/off multiple remote control switches. A remote control switch is a switch that controls a remote control relay to turn on/off a light, etc. Generally, one remote control switch contains one remote control relay. Like a regular relay, a remote control relay switches the main circuit on the secondary side between conducting and non-conducting states by turning on and off the switch on the primary side.

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