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Operational Difficulties
WARNING:
HIGH
ROTATING PARTS CAN CAUSE SERIOUS INJURY.
THE USE OF ELECTRIC MACHINERY, LIKE ALL
OTHER UTILIZATION OF CONCENTRATED POWER
AND ROTATING PARTS, CAN BE HAZARDOUS.
MAKE CERTAIN THAT THE VOLTAGE IS REMOVED
FROM ALL CIRCUITS AND THAT NO MECHANICAL
PARTS
ARE
ROTATING.
OPERATION AND MAINTENANCE OF ELECTRIC
Trouble
Motor will not start
Noise or vibration
GE Energy Motors GEEP-427-I
GEEP-427-I Pegasus, Horizontal Induction Motor
VOLTAGE
AND
INSTALLATION,
TROUBLE - SHOOTING CHART
Possible Cause
Power not connected
Low Voltage
Wrong control connections
Driven machine locked
Open circuit in stator or rotor
winding
Winding grounded
Excessive load torque
Overload control trip
Motor running single phase
Supply bus unbalanced
TROUBLE - SHOOTING CHART
TEWAC, Sleeve Bearing
MACHINERY
SHOULD
QUALIFIED PERSONNEL. FAMILIARIZATION WITH
NEMA PUBLICATION MG-2, SAFETY STANDARDS
FOR
CONSTRUCTION
SELECTION,
INSTALLATION
ELECTRIC MOTORS AND GENERATORS, THE
NATIONAL
ELECTRICAL
LOCAL PRACTICES IS RECOMMENDED.
Connect power to control, and control
to motor. Check contacts.
Check motor nameplate value with bus
voltage.
Check connections with control wiring
diagram.
Disconnect motor from load. If motor
starts
satisfactorily,
machine.
Measure/compare winding resistance
of each phase.
Test for grounded winding.
Check motor capability.
Wait for motor to cool. Try starting
again.
Stop motor. Then try to start. It will not
start on single phase. Check for
"Open" in one of the lines or circuits.
Check balance by measuring current
and voltage in each phase. Correct the
power supply to obtain balanced
voltages.
Copyright 2009, The General Electric Company, USA 31
BE
PERFORMED
BY
AND
GUIDE
FOR
AND
USE
OF
CODE
AND
SOUND
Action
check
driven
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