Estimating DC FLC

[josephkendall]

I have old dc motors that I don't have nameplate info for and I need to figure out the FLC. I know the HP and voltage. Any suggestions?

 

[Lewish]

The locked rotor dc resistance of a motor can be used to determine the FLA. Lock the rotor, apply a small DC voltage to the leads and measure the current. Use this info to determine the motor resistance. From this calculate your FLA at applied voltage.

 

[Crowbar1]

For a ball park figure at 250 volts use 3X the Horsepower.

 

[jbartos]

Suggestion: Visit

http://www.pljohnson.com/electrical/motorsandcntl/motors/motorformulas.shtml

etc. for more info