Double control switch circuit diagram
so double-double control refers to the two sides of the two panels on the two keys, a total of two power control to control in different places can control the same Equipment
In the bedroom you can also have a switch to control the living room lights. The same in the factory in the face of a motor control is very common two things
Double control switch refers to a device for two separate control, such as if it is lighting, that there are in the living room control the living room lighting
constitute the electrical connection of the circuit are called secondary circuit or secondary wiring
Used to monitor the meter, control the operation signal, relay protection and automatic devices, etc.
