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F. Check insulation resistance as pump/motor assembly is lowered into the well. Resistance may drop
gradually as more cable enters the water, but any sudden drop indicates possible cable, splice or motor
lead damage; see page 44.
9. After Installation
A. Check all electrical and water line connections and parts before starting the pump.
B. Start the pump and check motor amps and pump delivery. If normal, continue to run the pump until delivery is
clear. If three-phase pump delivery is low, it may be running backward. Rotation may be reversed (with power off)
by interchanging any two motor lead connections to the power supply.
C. Check three-phase motors for current balance within 5% of average, using motor manufacturer instructions.
Imbalance over 5% will cause higher motor temperatures and may cause overload trip, vibration, and reduced life.
D. Verify that starting, running and stopping cause no signifi cant vibration or hydraulic shocks.
E. After at least 15 minutes running time, verify that pump output, electrical input, pumping level, and other
characteristics are stable and as specifi ed.
Date _____________________ Filled In By ____________________________________________________
Notes _________________________________________________________________________________________
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Submersible Pump Installation Check List