Interlocking Two Air Compressor's .

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Years ago, we would simply add a NC aux contact on each starter and wire it in the control circuit of the other unit. Requires, of course appropriate warnings about foreign voltage in each control panel.
 
isnt a tpdt switch the easiest/safest way?
 
FionaZuppa said:
isnt a tpdt switch the easiest/safest way?
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Easy? Safe? Yes.

But have you priced a 300A-rated tpdt switch lately?


Compare to say a control three-position center-off operator with two NO contact blocks or starter aux contacts. There has to be some sort of control for a 300A air compressor motor!
 
Smart $ said:
Easy? Safe? Yes.

But have you priced a 300A-rated tpdt switch lately?


Compare to say a control three-position center-off operator with two NO contact blocks or starter aux contacts. There has to be some sort of control for a 300A air compressor motor!
Click to expand...

the model # i posted seems to retail around ~$2k.

so what was the final solution? there's option A - take days/weeks/months to try and find something for cheap, or option B - install TPDT today and take a dent in wallet. if the OP's job site needs air right away then option B sounds like it.
 
Maybe I missed something, but since this will not necessarily be safety disconnect or lockout, why not just interlock the starter controls instead?
Or are both motors really connected to a single starter?

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FionaZuppa said:
the model # i posted seems to retail around ~$2k.

so what was the final solution? there's option A - take days/weeks/months to try and find something for cheap, or option B - install TPDT today and take a dent in wallet. if the OP's job site needs air right away then option B sounds like it.
Click to expand...
My local supply house probably has the operator and contact blocks necessary plus an appropriate enclosure sitting on the shelf. Just need to confirm each compressor has its own starter. Yes, a dent in the wallet over internet pricing... but nowhere near $2k.
 
Seems to me if you ran both at the same time and it draws enough to blow fuses you maybe learn to not run both at the same time:huh:
 
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