GE Energy Motors GEEP-427-I Copyright 2009, The General Electric Company, USA
13
GEEP-427-I Pegasus, Horizontal Induction Motor
TEWAC, Sleeve Bearing
Wiring and Grounding
WARNING: MOTOR AND CONTROL WIRING,
OVERLOAD PROTECTION AND GROUNDING
SHOULD BE IN ACCORDANCE WITH THE
NATIONAL ELECTRICAL CODE AND
CONSISTENT WITH SOUND LOCAL
PRACTICES.
FAILURE TO OBSERVE THESE CAUTIONS
MAY RESULT IN DAMAGE TO THE
EQUIPMENT, INJURY TO PERSONNEL, OR
BOTH.
Power connections
The stator winding is terminated in the power
terminal box. Connections to the stator wiring should be
made in accordance with the stator connection diagram
for the machine or with the connection diagram shown
on the main nameplate. The stator is wound to produce
clockwise rotation, facing opposite drive and when the
phase sequence of the applied voltage is T1, T2, and T3
(i.e. when the phases of the supply voltage connected to
the power leads reach positive maximum in that time
order.). The direction of rotation can be changed by
reversing any two of the connections. However, the
machine should always rotate in the direction shown on
the nameplate. Machines Furnished with a single
direction of rotation have an arrow on the drive end. If
the owner desires to operate the motor in opposite
standard rotation, first check the factory for suitability
through the nearest General Electric office.
Before any electrical connections are made
between the machine and the owner’s power or accessory
cable or wire, it is desirable to check the insulation
resistance of the winding to determine if the winding is
sufficiently dry for safe operation. See the section
entitled Insulation Resistance on page 14. This check
may prevent having to break the electrical connections
later.
The stator winding leads are terminated with
connectors for bolting to corresponding connectors on
the cable from the owner’s power supply. The bolted
connections should be adequately insulated, phase-to-
phase and to ground.
Accessory connections
Depending upon the specific equipment
furnished, (see outline nameplate) the machine may
include any of the following accessories:
•
Stator winding resistance temperature
detectors, 2 per phase
•
Bearing resistance temperature detectors.
•
Copper-constantan bearing thermocouples
•
Bearing temperature readout capability
•
Bearing temperature alarm and shutdown
contact capability
•
Space heaters, with either 220C or 120C
maximum surface temperature
•
Stator winding thermostat
•
Heaters for the bearing oil reservoir. Switch
for excess pressure drop across air filters
•
Proximity type vibration pickup for shaft
vibration with or without proximeters (sleeve
bearings only)
•
Velocity vibration pickup for end shield
vibration (antifriction bearings only) with
alarm light and contacts
When supplied, all of the above accessories will
have electrical terminations in the accessory terminal
box, except for the seismic vibration pickup which has its
electrical termination for the contacts at the device
located on the endshield.
For all of the accessories that have electrical
terminations in the accessory terminal box, a Schematic
Diagram and an Accessory Lead Connection Diagram
will be provided on the inside of the accessory terminal
box cover. This gasketed cover should be kept closed to
prevent the entrance of moisture, dust and conducting
particles. The gasketed cover should be kept closed to
Summary of Contents for Pegasus MHV GEEP-427-I
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