Switch is a very
common thing in our daily life. However, there are many kinds of switches, including
single control switch and double control switch. Double control switch is
divided into single connection single control and double connection double
control. You may know more about the single switch. Today, I will introduce you
to what is the three gear rotary switch.
Let's have a look!
A. Introduction to three speed rotary switch
The three gear rotary switch is divided into
double connection single control switch and double connection double control
switch.
Single connection refers to a button with single control: that is, it has only one connection (normally open contact or normally closed contact). Double control: that is to say, it has two connected (normally open contact and normally closed contact). These switches refer to buttons, the kind with springs. Single link single control switch is generally used for inching control, and double link single control switch is generally used for long-term control.
These two circuits ensure that when any switch state changes, the intermediate connected electrical appliances and power supply can be switched in the open / open state. Single control switch features: on and off; Double control switch features: up on and down off or down on and up off. The single control switch is only used to control the on-off of the lamp; The double control switch can be used as two places to control the on-off of the lamp respectively.
Dual single control
Two single switches combined to control two point lights
Dual control
It is also divided into dual single control and dual dual dual control. It is mostly used for the control of one point light switch at two positions or the control of two point light switches. It is often used in staircases.
B. Working principle of three gear rotary switch
"Dual single control" means that there are two single control buttons on one panel, and both buttons are used to control the switch of lamps in one direction, that is, the on and off of lamps can only be controlled in a fixed place. Unlike the two-way control switch used in stairwell, it can be opened from the bottom to the top.
"Single connection double control" means that there are two buttons with a certain distance to control a group of light sources at the same time. "Single connection single control" means that one button controls a group of light sources. Control, etc. "Connection" refers to several switch buttons on the same switch panel. "Control" refers to the control mode of the switch button, which is generally divided into "single control" and "double control".
Wiring method of double connection double control switch:
1. Wire color of double connection double control switch: live wire: red; Zero line: blue; Incoming and outgoing lines: green.
2. Wiring of double connection double control switch: first connect the middle terminal of one double control switch to the live wire, then connect the middle terminal of another double control switch to the lamp cap (or the central tongue of the screw port lamp cap), and then connect the incoming and return wires, that is, arbitrarily connect the upper and lower terminals with two green wires; The zero line is directly connected to the other connection of the lamp cap (or the thread of the screw cap), which completes the connection.
