Three-phase switch

Posted on Jan 24, 2013

To simplify the following schematics and facilitate easy understanding of the principles involved, the following schematic substitution is used (Note the triac driver is of limited use at 3 f voltage levels).

Three-phase switch
Click here to download the full size of the above Circuit.

The following are three-phase switches for low voltage. Higher currents can be obtained by using inverse parallel SCRs which would be triggered as shown.

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