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Triacs rather than contactor

Has their been any consideration to using Triacs for the ctive (but not neutral) switching- particularly for three phase?


Any thoughts?


Regards,

Dave


Hm, I can answer my own question. 40A RMS would generate about 25-40watts * 3 (for three phase). Too much heat.


Regards,

Dave

Yes, too much heat... tendency to fail unsafe (closed) and also a fail of UL safety standards as Triacs / Solid State Relays can have residual voltage on the lines.

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