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Estimating DC FLC

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josephkendall

josephkendall

Electrical
Feb 27, 2003
4
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?
 
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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.
 
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For a ball park figure at 250 volts use 3X the Horsepower.
 
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