S

Sayedahmed

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
 
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

Hi mate,

usually an electrical interlock is sufficient. I think an additional interlock is only required by cranes, FLTs etc.
Hope this will help.:)
 
thanks very much
more details:

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
 
i would personallyhave a mechanical interlock, as i have experienced contactors sticking to NO or NC before, and you would'nt want both supplies to energise together ect!
 

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Question about non-automatic transfer switch
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Electrician Talk | All Countries
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Sayedahmed,
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johnstantine,
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