Electrical Switch Symbols
Standard Electrical Switch Symbols For Electrical Schematic Diagrams
Most of the switch symbols can changed in their appearance, style and color according to the requirements.
The switch symbols below shows SPST, SPDT, DPST, DPDT, make contact, break contact, two way contact, 2 position switch, 3 position switch, 4 position switch, limit switch, inertia switch, mercury switch, and also delay switch such as time delay switch, time delay break, flow actuate switch, liquid level actuated switch, gas flow actuated switch, temperature actuated switch and pressure actuated switch. Also shown are the component symbols for fuse, isolator, relay contact, pilot light and mercury.
Basic Switch Symbols
The switch symbols below shows SPST, SPDT, DPST and DPDT.
SPST Single Pole, Single Throw. An on-off switch allows current to flow only when it is in the closed (on) position.
In our electrical software, you can click the action button then click the Close Circuit menu item to close the circuit switch.
You can double click to edit the text at the symbol.
You can move the yellow control point to change the position of the text.
SPDT Single Pole, Double Throw. A 2-way changeover switch directs the flow of current to one of two routes according to its position. Some SPDT switches have a central off position and are described as "on-off-on".
After selecting the SPDT symbol, you can change the switch position up, center or download by the action button.
DPST Double Pole, Single Throw. A dual on-off switch which is often used to switch mains electricity because it can isolate both the live and neutral connections.
DPDT Double Pole, Double Throw. This switch can be wired up as a reversing switch for a motor. Some DPDT switches have a central off position.
Contact Switch Symbols
The following switch symbols present make contact switch, break contact switch, two way contact switch, passing make contact switch, spring return switch, stay put switch, and also limit switch, circuit breaker.
The switch contact symbols are smart and can be designed so that the contacts "close" (establish continuity) when actuated, or "open" (interrupt continuity) when actuated. For switches that have a spring-return mechanism in them, the direction that the spring returns it to with no applied force is called the normal position. Therefore, contacts that are open in this position are called normally open and contacts that are closed in this position are called normally closed.
For example: when you click the action button at the Make Contact switch symbol, the follow dialog will pop up.
Then you can change the switch's appearance according to your requirements.
The above switch symbols are some different appearance of break contact switch.
Electrical Switch Symbols
The following table lists more electrical switch symbols in our electrical drawing software such as position switch, manual switch, pushbutton break switch, selector switch.
|Name||Switch Symbol||Alternate Symbol|
|2 position switch|
|3 position switch|
|4 position switch|
|pushbutton make switch|
|shorting selector switch|
More Switch Symbols and Delay Symbols
The following symbols are some industrial switch symbols and delay symbols.
In our electrical diagram software, you can use the action button to choose the right electrical symbols with one click.