Table of Contents
What is the LRA on a refrigerator compressor?
Locked Rotor Amps (LRA) – Current drawn by the compressor if the rotor is locked and can’t move while electric power is applied.
What is LRA on a motor?
locked-rotor amperage (LRA) The very high current or amperage a motor draws when power is first applied, due to low counter emf. It is usually five to six times the running load amperage.
What is LRA rating?
see less LRA – Locked Rotor Amps: The current you can expect under starting conditions when you apply full voltage. It occurs instantly during start up. RLA – Rated Load Amps: The maximum current a compressor should draw under any operating conditions. LRA means locked rotor amps.
What is FLA and LRA of a motor?
FLA: Full-Load Amps: Amount of amperage drawn when motor is working at rated horsepower. LRA: Lock-Rotor-Amps: A motor draws a surge of amperage when it starts to get the rotor rotating and to achieve the rated horsepower. This amperage draw is approximately 6 x FLA of the rated motor for six to eight seconds.
What is HP in refrigeration?
Kilowatts (kW) and horsepower (hp) are both measures of power, and converting one to the other is a matter of multiplying by a conversion factor. Neither unit is a reliable measure of an air conditioner’s cooling power, though, because neither takes into account the efficiency of the refrigeration system itself.
What is running horsepower?
Most electric motor manufacturers rate their motors by the horsepower developed after the motor has come up to its designed operating rpm’s and disengaged the start windings. This is often referred to as running or rated horsepower and is a true indication of the HP a motor can sustain over a long period of time.
How many horsepower does one ton of refrigeration have?
1 hp, hp (UK) = 0.2120361315 ton (refrigeration) 1 ton (refrigeration) = 4.7161773471 hp, hp (UK) Example: convert 15 hp, hp (UK) to ton (refrigeration): 15 hp, hp (UK) = 15 × 0.2120361315 ton (refrigeration) = 3.1805419721 ton (refrigeration)
What does the LRA mean on a refrigeration compressor?
If you check the data plate on any refrigeration compressor you’ll notice the LRA. What does it mean? The LRA indicates how much amperage the motor will pull while trying to make the rotor spin inside the stator, if the rotor is locked up! What could caused it to lock up?
What is the running ampere of LRA 56?
If you know LRA, you can find out exact running ampere.if LRA 56 Then 56*100/500=11.2A. If you know LRA, you can find out exact running ampere.if LRA 56 Then 56*100/500=11.2A. Not exactly! Running current depend on compressor compression ratio and state of mechanical parts. These changes, but LRA is always same.