brightspark
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- Thread starter W.olly
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AVI_8
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Thanks for that, it’s what I’d Been searching for.
AVI_8
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@brightspark something I need to get my head around this, I’ve 2 identical compressors, how do I link the two with this time delay, let’s say that both compressors pressure outlets are going to the same source, they are both individual compressors at this point but the outlets are joined.
I presume you would have to have them both running off the same pressure switch wiring coming from one pressure switch to both motors, with a time delay relay going to the second compressor motor, but the pressure switches appear to have a 20 amp capacity so how do you run both compressors through the same pressure switch if the combined amps for both compressors is around 24 amps? 2 X 3 HP
Is a single pressure switch able to deal with that output or am I completely wrong in the way that I presumed that this would be wired?
I presume you would have to have them both running off the same pressure switch wiring coming from one pressure switch to both motors, with a time delay relay going to the second compressor motor, but the pressure switches appear to have a 20 amp capacity so how do you run both compressors through the same pressure switch if the combined amps for both compressors is around 24 amps? 2 X 3 HP
Is a single pressure switch able to deal with that output or am I completely wrong in the way that I presumed that this would be wired?
daleyd
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Use the pressure switch to switch a contactor for the second compressor. Your timer would be part of this, so when the first compressor is started the timer is energised, after the delay this brings in the second contactor to start the second compressor
You could use a contactor for the first compressor too if you wanted, but prob not 100% necessary if it’s ok through the pressure switch.
not done it yet
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Maybe his two compressors are less than 3HP each?
AVI_8
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Thanks I think I’ve finally got my head around this, a tail from the compressor with the pressure switch to be used would be taken from that pressure switch which would go to the timer which would then send a current after a few seconds to the contactor coil to close the circuit and would draw a supply from a separate 16 amp supply to run the second generator motor, and if two contactors are used the pressure switch would do nothing more than to energise the coils to both contactors.
Presumably when the power is cut to both of the motors the unloader valve would operate on both pumps simultaneously.
Sorry for hijacking your thread W.olly
