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Thread: Typical running amps
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08-09-2009, 05:30 PM #1
Typical running amps
Let's start a discussion on compressor running amps:
I admit I am not sure how to read if a compressor is running at the correct amps. You can read off the data plate what the locked rotor amps (LRA) are, and the full load amps (FLA)......
For example the LRA may be 30A and the FLA can be 10A; as long as the running amps is below the 10A, I am happy it's not overworking. But if you study refrigeration literature, it mentions that for eg. high subcooling, higher amps, short of refrigerant, lower amps ....
The question then is : Is there a scientific means of ensuring you have the right running amps for various load applications, or am I trying to be over-the-top?
Bonus question: what is the maximum allowable difference in voltage and current draw between phases on a 3-phase compressor?If at first you DO succeed, try to hide your astonishment!!
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