Power switch
A power switch is a two-port switch that only opens or closes one circuit .
Single pole on switch
The English abbreviation is SPST and means “ S ingle P ole S ingle T hrow ” (German about “single pole simply umlegend”). SPST is also often interpreted as “ Single Pole Single Through ” or “ Single Pole Single Touch ”. It is used to switch electrical consumers on and off ( switch off ), for example as a light switch .
Two-pole on-switch
The abbreviation is DPST meaning " D ouble P ole S ingle T HROW " (German about "double-pole simply umlegend"). DPST is often referred to as “ Double Pole Single Through ” or “ Double Pole Single Touch ”. Internally, it consists of two single-pole switches that are operated simultaneously. For example, in devices that are connected to a socket , the live external conductor and the neutral conductor are separated at the same time. Even if the plug is inserted the other way around, the dangerous voltage is switched off.
See also
- SPDT - single pole changeover switch
- DPDT - two-pole changeover switch
literature
- Theodor Schmelcher: Handbook of low voltage . Siemens Aktiengesellschaft, Berlin / Munich, ISBN 3-8009-1358-5
- Günter Springer: Expertise in electrical engineering . 4th edition. Verlag Europa-Lehrmittel, 1965, ISBN 3-8085-3018-9