GE Custom 8000 Instructions Manual page 20

DLCGEEP-124-I/000, Approved, 2016-11-11, CampinasDM
period of time, cause corrosive deposits to develop which
further contribute to deterioration.
Keep metal particles such as copper, iron or steel
away from the machine. This is especially important for
iron and steel since such particles will adhere
magnetically and are extremely difficult to remove. They
may be agitated by magnetic fields present during
operation causing abrasion and eventual failure of
insulation. If for any reason sawing, drilling, machining,
etc., of ferrous materials must be done in the general
vicinity of the unit, such work should be done as
remotely as possible. The unit should not be in operation
at that time. All filings, chips, etc., should be completely
removed prior to starting the unit. The same precautions
should be observed for copper chips or other conducting
materials.
In removing dirt and contamination from the
machine, a vacuum is much preferred to positive air
pressure. Air pressure does not remove, but only
relocates, the objectionable material. It frequently drives
and embeds foreign material into the sides of insulation
as well as into natural crevices inside the machine. A
suction hose from an industrial-type vacuum cleaner
Stator winding (including bracing and support structures, coil
end connections, insulation resistance check)
Rotor end ring (or end turns)
Rotor removal (rotor and stator bore)
Stator core (with rotor removed)
Brushes and collector rings
Bearing inspection
Bearing lubrication
Separate lube system (if supplied)
Top cover (filters)
protect the winding and bearings from over temperatures
by means of protective relays, then the maintenance
program must discharge the local operator with being
aware of the winding and bearing temperatures on a
continuous basis. This also applies to vibration
monitoring and protective equipment.
20 GE Industrial Control Systems GEEP-124-I
Item
Copyright 1997,1998 The General Electric Company, USA
GEEP-124-I Horizontal Induction Motor
WPI, Antifriction Bearing
should be used for cleaning. The hose wand or nozzle,
which comes into direct contact wit the machine parts,
should be small enough in cross-section as to produce a
reasonably high air velocity at the entrance to the wand.
This is necessary to accelerate and move the foreign
material into the vacuum hose.
Frequency of Inspection
Frequency of inspection will vary with the item
being inspected and with the severity of local
environmental conditions.
Certain items, such as winding temperature,
bearing temperature and vibration amplitude should be
monitored on a conditions basis. If local provision has
been made for readout or printout of these parameters,
and if contacts and relays are provided to shut down the
unit in case of above-normal temperatures, then all that
is required for inspection is to assure that the protective
equipment is operational and set to detect abnormal
operation. Conversely, if no provision has been made to
Frequency of Inspection
Clean Conditions
Yearly
Yearly
Every Five Years
Every Five Years
Quarterly
Every Three Years
Twice Yearly
Quarterly
Quarterly
Routine inspection and maintenance of the stator
winding, rotor winding, core, brushless exciter,
brushless and collector rings (for machines supplied
with this equipment), bearings and top covers should be
done on a scheduled basis. However, the frequency will
depend upon the severity of local environmental
conditions. Installations located in clean environments
Severe Conditions
Quarterly
Yearly
Every Five Years
Every Five Years
Monthly
Yearly
Bi-Monthly
Monthly
Monthly