Labrat
Gold Member
LRA is Locked Rotor Amps in the event the compressor is locked up. your running amps will be more like 17-18 running. 18 amps times 220 volts = 3960 watts divided by 746 watts per HP = 5.3 HP on your 5 ton unit. But that may be a scroll compressor that is more efficient than a recip.
Also tractor compressor will be turning much less compressor speed than a car engine so it will draw less power.
Also tractor compressor will be turning much less compressor speed than a car engine so it will draw less power.