Well pump meggering - Page 2 - Electrician Talk - Professional Electrical Contractors Forum

leenah · 04-05-2010, 10:58 PM

Quote:

Originally Posted by Zog

What was the winding temp at the time of test????? Worthless data without tempatures. What was your 1 minute and 10 minute readings? Hard to calculate DAR and PI without the other readings

The temp of the motor submersed in the water i did not get.

I did not do the other tests with longer duration

Zog · 04-06-2010, 09:32 AM

Quote:

Originally Posted by leenah

The temp of the motor submersed in the water i did not get.

I did not do the other tests with longer duration

Tempature makes a huge difference, now with your 500M readings on a LV motor you should be good no matter what but the readings are useless for trending in the future without the tempature. What happens in a year or 2 when you test this motor and the tempature is different? The most valuable info you get from an IR test is not so much what it is today but what the trend is over time for predicting failure.

A spot test only measures one if the 3 insulating properties of insulation so you are only getting part of the story. DAR is key info for a LV motor.

leenah · 04-06-2010, 08:52 PM

is there a reference manual to show reading values for different motors?

ie, baldor, franklin, goulds, etc?

Zog · 04-06-2010, 09:42 PM

Quote:

Originally Posted by leenah

is there a reference manual to show reading values for different motors?

ie, baldor, franklin, goulds, etc?

Not by manufacturer but by type, size, and vintage. I posted all the specs earlier in this thread (#12)