Rocker Switch (Double-Pole) YSR-1221(B)

A three-control switch refers to the separate control of a certain device in multiple places. For example, if it is a lighting, you can control the lights in the living room when you enter the door. When you go to the bedroom and want to sleep, you will be tired if you run to the living room to turn off the lights. You can also install a switch in the bedroom to control the lights in the living room. It is also very common to control a motor in two places in the factory, so the three-control refers to the keys on multiple panels in different places, which control multiple power supplies in total to control the same device in different places (such as, flashlight). 1. Three double control switches control: install a 220V relay (two sets of moving and closing, two sets of switching) inside the double control switch. The contact connection principle is as shown below. The wire package is connected to 220V through a switch, which can be a double-control switch, a single switch or a self-…