How do you convert LRA to HP?

LRA (lock rotor amps) can be converted to HP using this formula: (LRA Watts x Volts)/ 746 Watts = Horsepower. You can also use the BTUh. For example, 18,000 BTUh equals 2 HP or 24,000 2.5 HP.

How do you calculate LRA tonnage for a compressor?

Take model and serial label, within the model number you’ll find something like 036, 048, etc. this is your btu, or British thermal unit capacity. Every 12,000 BTU’s equals one ton, so an 036 would be a 3 ton and so on. Divide your Locked Rotor Amps by about seven will give an approximation of the current draw.

What does LRA mean on a compressor?

Locked Rotor Amps
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.

How do I know what HP my compressor is?

Plug the compressor into the watt meter. Note the number of watts of power the device draws. For example, the power might be 1500.0 watts. Convert the power to horsepower by dividing by 745.8.

How do you calculate LRA?

To find LRA and starting kVA enter nominal operation voltage (such as 120 or 240), HP value, code letter from the nameplate label, and hit “Calculate” button. The general equation for single-phase devices is the following: LRA=1000*(kVA/HP)/Voltage. Note that this defines starting current at full nominal voltage.

How do you find the tonnage of a compressor?

Divide the number listed by 12,000. This will tell you how many tons your HVAC compressor is. For example, if the BTU number listed is 36,000, divide it by 12,000 and you’ll see that you have a 3 ton unit.

What is FLA and LRA of a motor?

Amperage (Current): FLA: Full-Load Amps: Amount of amperage drawn when motor is working at rated horsepower. RLA: Running-Load-Amps: Same as FLA. 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.

What is LRA?

A less restrictive alternative (LRA) is outpatient treatment provided to an individual who meets criteria for commitment but is not residing in a facility providing inpatient treatment. The DMHP must then file a petition with the court for revocation of less restrictive alternative treatment.