What are single control switch, double single control, three single control and double control?

1. Single-link single-control switch: Single-link single-control switch is the "stairwell switch". Single-connected single-controlled switch is relatively simple, one switch controls one or a group of electrical appliances, which has nothing to do with the electrical appliances on other lines, while single-connected double-controlled switch can control the same electrical appliance at two different positions, which is widely used in some places (such as walking stairs, hotels, etc.). ).

Second, double single control switch: Double single control switch is generally used in rooms with two sets of light sources. "Double single control" means that there are two single control buttons on a panel, both of which are used to control the lights in one direction, that is, the lights can only be turned on and off in a fixed place, which is different from the two-way control switch used in stairwells, and can be turned on at the bottom and turned off at the top.

Triple single control switch: Triple single control switch means that there are three buttons on a switch panel to control three different places respectively, but the lights in these three places can only be controlled separately in one place.

Four, single and double control switch: single and double control switch is actually two single-pole double-throw switches connected in parallel to the circuit. Each single pole double throw has three terminals, which are respectively connected with two contacts SPDT a knife.

Extended data:

Working principle of single-chain single-control switch;

* * * There are two terminals, one for incoming and the other for outgoing. When the switch button is pulled or pressed, there are two states: on or off, thus turning the circuit into a path or an open circuit. In the lighting circuit, in order to use electricity safely, a single switch should be connected to the live wire.

In fact, the single-link single-control switch is the most widely used, and it is also welcomed by families, companies and most power demand groups because of its convenient use and installation. Almost all families and companies use single-chain single-control switches. Old-fashioned wired switches, 86-button switches, water dispensers, electric blankets, wiring boards, etc. all belong to single switches.

Baidu encyclopedia-single chain single control switch

Baidu Encyclopedia-Double Single Control Switch

Baidu Encyclopedia-Sanlian Single Control Switch

Baidu encyclopedia-single and double control switch