Cross switch
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A cross switch (also called a pole changer) is a switch with four electrical connections. Two of them are connected, when activated the connections are swapped. Two toggle switches can be used as a model , which are connected in mirror-inverted fashion and operated at the same time.
use
- For cross connections : With this you can, for example, switch the light on and off from each switch in a large room with several doors. Cross switches are used in this case if the consumer is to be switched from more than two places. At the beginning and at the end there is a toggle switch and any number of cross switches in between. When actuated, these swap the corresponding wires. If a consumer is to be switched from more than 3 places, depending on the line structure, a circuit consisting of buttons and impulse switches is often more economical. Here, 2 conductors per button are sufficient, the cross switch requires 4 conductors. In this application, no more than one of the two changeover switches has current flowing through it.
- As a pole changer: A cross switch can be used in a DC circuit to switch the direction of rotation of a motor . In this case the cross switch is used between the voltage source and the consumer. By pressing the switch, the connection to the positive pole and negative pole is swapped and the direction of the current is reversed. In this application, current flows through both changeover switches. It is important here that the switching processes are not bridging , in that the NC contacts lead or the NO contacts lag.
See also
literature
- Günter Springer: Expertise in electrical engineering. 18th edition, Verlag - Europa - Lehrmittel, Wuppertal, 1989, ISBN 3-8085-3018-9