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Winding Resistance (line to line)
To check the winding resistance of the motor windings, a
megohmmeter is required.
1.
2.
3.
4.
5.
Evaluation
Turn the power off
Disconnect all electrical leads to the motor.
Set the scale on the megohmmeter to Rx1, touch its leads together
and adjust the indicator to zero.
Using the charts below for reference, touch the leads of the
megohmmeter to the appropriate pair of connectors. Check all pairs
that are present and write down and label
(R
A
,
Rsl' R
S2
'
R)
all readings.
Compare your readings to the matching model, phase and voltage
on the chart on page 15.
The resistance values must fall within the tolerances listed on the
next page. If they do not, replace the motor.
Internal Wiring
UPS
Terminal plug in stator
r;:
I
I
I
A
I
I
l_
Single Phase
Three Phase 208-230V
R
A
:
6-1
R
s ,:
12-8
R
S2
:
4-10
Page 13
or
or
or
A: Main winding
52: AUxiliarywinding
5,: Auxiliarywinding
6-1,7-2
12-8,14-9
4-10,5-11
R:
5-9
R:
11-12
R:
4-6
or
or
or
5-9,7-14
11-12,1-10
4-6,8-2
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