Question about non-automatic transfer switch
Question about non-automatic transfer switch
(OP)
hi,
i want to design non-automatic transfer switch by 2 contactors and push buttons.
my question is do i need mechanical between the 2 contactors? or it is enough to work with NO-NC for both contactors.
please help me
i want to design non-automatic transfer switch by 2 contactors and push buttons.
my question is do i need mechanical between the 2 contactors? or it is enough to work with NO-NC for both contactors.
please help me





RE: Question about non-automatic transfer switch
Big multipole switches rated up to at least a couple of hundred amps are available from the likes of Craig & Derricott, Kraus & Naimer, and a few others.
If you use contactors then you need a mechanical interlock. Personally I'd also use electrical interlock backed up by a mechanical interlock: a plain mechanical interlock usually results in a cooked contactor coil if the interlock comes into play.
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RE: Question about non-automatic transfer switch
Keith Cress
kcress - http://www.flaminsystems.com
RE: Question about non-automatic transfer switch
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RE: Question about non-automatic transfer switch
I need this to work between generator and main , it is not manual with handle and also not ATS.
can i count on wiring the NO for the first contactor with NC for the second contactor and vice versa
so when the first is on the second is off and when the second is on the first is off.
i don't want the main power get into the generator
RE: Question about non-automatic transfer switch
RE: Question about non-automatic transfer switch
Bill
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"Why not the best?"
Jimmy Carter
RE: Question about non-automatic transfer switch
I think change over switch is more a Appropriate
also i will use mechanical interlock