How To Test a Motor with the Fluke 1587 FC

How To Test a Motor with the Fluke 1587 FC


Current unbalance can be caused by bad
wiring or insulation problems within the
motor. What we’re going to do now is test
our motor. Before we do that though, we
want to get into our Fluke Connect app
so we can save the measurements that
we’re doing for later purposes. You will
want to download the Fluke Connect app
either through the Google store or
through your App Store. As you can see,
I’ve already downloaded the app and I’m
going to go ahead and get into the Fluke
Connect app. At this point here, we want
to go ahead and turn the meter, on all
the way over to the far right in the
orange for our insulation test.
The corner here we’ll hit the Fluke Connect button. We’re going to go over to our
phone and hit the capture measurements.
As you can see, the 1587 FC is now
connected to it, we’ll connect to that
meter. Typically in an insulation test, we
want to double the value of whatever the
rating is for voltage. In this case, this
motor is a 480 volt motor. We’re going to
change the range of our insulation meter
to a thousand volts. By doing that, you’ll
hit the range button.
Now that we’re at the thousand volt test,
we’re going to check the windings of our
motor to ground. We’re going to change
the next leg by going to the black leg,
as you can see here. Again, by hitting
the test button we can perform the test.
We’ll run this for 10 seconds. We’re
basically charging up the line to
confirm nothing is breaking down. Now
that we’ve run that test, let’s go ahead
again and save it. We’ll make our note:
this time it was the black leg. We’ll hit
our done button and we’ll go ahead and
hit our done button up at the top.
Our final test on this motor will be the
white leg.
Now that we’ve connected to the white leg,
let’s go ahead and do the final test.
We’re going to go ahead and save the
last test and identify it in our notes,
as this was the white leg. By hitting
done, we’re done.
Now, you can see that we’ve made all
three measurements on the legs.
We validated that all measurements were
greater than 2.2 Giga ohms at
1000 volts DC. This is a good valid
test for this motor. If we had
seen a problem, we would have definitely
seen a lower breakdown in our ohms.

4 Replies to “How To Test a Motor with the Fluke 1587 FC”

  1. Please do some more videos on this meter as it relates to the megger. I am a maintenance tech and I earned a degree in electrical but some of the functions are hard to understand how to navigate through.

  2. Is 2 G ohms enough resistance to show poor insulation?
    I find handhelds don’t have high enough ohms for an accurate test.

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