Milliohm meter

Considering a milliohm meter to measure the resistance of windings in a 3-phase motor. Typical resistance is in the range of 0.1 ohm and need to discern probably 0.001 ohm differences in order to determine if there are problems in the windings.

Any recommendations out there on milliohm meters? Are the $400 units okay, or do I need to spend several thousand?

Steve G. in MD

Top Replies

vsluiter over 11 years ago +1

Another way to measure milliohms reliably is to use a normal lab power supply and a decent multimeter with millivolt range. If you are allowed to pump 1A DC through a winding, measuring the voltage over…
mcb1 over 11 years ago in reply to ravi_butani +1

All very useful ... but If I read correctly the intention was to check windings for a shorted turn.?? I turn shorted in 100, 200 or even 50 may not show any reading change, unless the motor had a previous…
nermash over 11 years ago +1

I fully agree that testing for shorted windings with a miliohm meter is not the best thing to do. I believe that there are some testers around for that purpose, probably based on the "ringer" type used…

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0 element14jamie over 11 years ago

Hello Steve,
Welcome to the element14 Community, we hope you are enjoying it! I will move this to the Test & Measurement area as it is a better fit.

Thank you,

Jamie
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0 element14jamie over 11 years ago

Hello Steve,
Welcome to the element14 Community, we hope you are enjoying it! I will move this to the Test & Measurement area as it is a better fit.

Thank you,

Jamie
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