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Gorman-Rupp Pumps S4A1-E25 460/3 1396155 and up User Manual

Page 26

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OM-06098

S SERIES PUMPS

PAGE D - 4

TROUBLESHOOTING

the other test lead to each of the motor cable
leads in turn. Note the readings.

b. Readings will indicate resistance values in

both the power cable and motor windings.If
resistance reads infinity (

1), insulation is

good. If resistance reads between infinity (

1),

and 1 megohm, insulation is acceptable but

should be rechecked regularly. If resistance
reads less than 1 megohm, insulation should
be checked more closely and frequently.

c. If readings indicate that a ground exists, test

the stator and motor power cable separately.
Replace as required.