GEI M1010-A
© Copyright 2011 General Electric Company
8
C. Jogging and Repeated Starts
CAUTION: Repeated starts and/or jogs of induction motors greatly reduce the life of the winding
insulation. The heat produced by each acceleration or jog is much more than that dissipated by the
motor under full load. If it is necessary to repeatedly start or jog a motor, it is advisable to check the
al GE Energy sales office.
V. MAINTENANCE
WARNING: Before initiating maintenance procedures, disconnect all power sources to the motor
and accessories. For motors equipped with surge capacitors, do not handle the capacitors until
they are discharged by a conductor simultaneously touching all terminals
This discharge conductor should be insulated for handling.
grounding connections prior to operating.
A. General
If the motor is dismantled during maintenance, sealing compounds (if any) shall be removed from machined rabbets
(spigots). When reassembling the motor, all machined surfaces forming metal-to-metal joints should be sealed with
watertight sealing compound (Tite-Seal, GE Spec. A50CD427A or equivalent).
Inspect the motor at regular intervals, depending on service. Keep the motor clean and the ventilation openings clear.
In addition to the daily observation of the overall condition, it is recommended that a general inspection routine be set
up to check periodically the following items:
1. General cleanliness
2. Insulation and windings
3. Lubrication and bearings
B. General Cleanliness
The interior and exterior of the motor should be kept free from dirt, oil and grease and conducting dust. Paper, textile
or dusts may build up and block off ventilation. Any of these contaminants can lead to early motor failure.
C. Division 1 Explosion Proof Motors
Division 1 Explosion-proof motors have special features and are manufactured in accordance with UL and carry its
label. Therefore, repairs need to be made at a GE Service Shop, which has been authorized to make such repairs.
D. Insulation and Windings
To obtain a long life and satisfactory operation of insulated windings, they should be kept clean from dirt, oil, metal
particles and other contaminants. A variety of satisfactory and acceptable methods are available for keeping the
windings clean. The choice of method will depend greatly on time, availability of equipment and on the insulation
system. Vacuum and/or compressed air cleaning with non-metallic hose tips should precede cleaning with water and
detergent or with solvents. Tightly adhering dirt will require removal by gentle brushing or wiping.
WARNING: To prevent injury to the eyes and respiratory organs, safety glasses and suitable
ventilation or other protective equipment should be used.
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