I'm looking at buying a relay for my rotary phase converter. I need a cheap relay to kick a start capacitor in to spin up the idler motor.

I found one at Surplus Center at it's rated at 30 amps up to 300 volts or 2 hp at 240 volts. Why such a difference? According to the FLA motor chart I'm looking at, 30 amps at 230 volts would be the FLA of a 5 horse motor.

Anyway, I need to kick in my start capacitor only momentarily but it is for a 10 horse idler motor. I reckon it will have to handle 30-40 amps but for no more than about a second. Any reason I couldn't use this relay? I don't think I would want to use it for a relay that was going to be on for any length of time, but just for a second or two, surely it would be ok?

I should add that it had 30 amp FLA at 277 and a 75 amp LR at 277 ratings.

I found one at Surplus Center at it's rated at 30 amps up to 300 volts or 2 hp at 240 volts. Why such a difference? According to the FLA motor chart I'm looking at, 30 amps at 230 volts would be the FLA of a 5 horse motor.

Anyway, I need to kick in my start capacitor only momentarily but it is for a 10 horse idler motor. I reckon it will have to handle 30-40 amps but for no more than about a second. Any reason I couldn't use this relay? I don't think I would want to use it for a relay that was going to be on for any length of time, but just for a second or two, surely it would be ok?

I should add that it had 30 amp FLA at 277 and a 75 amp LR at 277 ratings.

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