GE Industrial Solutions Evolution Series E9000 - Manual (Page 21)

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Evolution Series E9000 Installation & Maintenance Guide
Chapter 5 – Maintenance
Equipment Maintenance
The customer should prepare a maintenance program
consisting of a schedule and checklist matrix listing items
to be periodically examined on the installed equipment.
The frequency and extent of the maintenance activities
will vary depending on such factors as equipment usage
and environmental conditions. In any maintenance
program the following actions should be included:
1. Remove accumulated dust and dirt with a soft
cloth, brush or vacuum cleaner.
2. Wipe clean all main bus insulators and vertical bus
barriers.
3. Inspect main and vertical bus joints and main bus
supports and tighten, if necessary. Refer to Table 1
for torque specifications.
4. Inspect all wiring from units for deterioration of
insulation.
5. Remove draw-out units and check stabs and all
unit wiring. Remove accumulated dust from
horizontal shelves and the areas around stabs.
6. Check all starter contacts. They need only be
replaced when nearly all the silver tip is gone and
the contact tip support is exposed. Do not file the
contacts. Filing or otherwise dressing the contacts
only results in lost tip material and reduces starter
life. See GE publication GET-6915A for questionable
contact appearance.
7. Check all unit wiring for deterioration of insulation
and tighten all connections.
8. Visually check meters and instruments. Check critical
instrument calibrations.
9. Check all unit door interlocks for proper operation.
10. Check all indicating lights and replace, as required.
11. If fuse replacement is necessary, always install the
same type and rating as the fuses furnished with the
motor control center. Fuse designs may be mechani-
cally equivalent but not electrically equivalent.
They may not have the same short-circuit withstand
and current-limiting ability.
Control Power Fusing
Control fuses are front accessible except in the 6-inch
compact starter. Remove 6-inch FVNR starter for
maintenance. Fuses are located on the side, as shown
in Figure 40.
Figure 40. Fuse location.
Suggested Maintenance Tools
The following tools are recommended for performing
maintenance operations:
• GE Spectra circuit breaker rating plug removal tool,
catalog number TRTOOL (see Figure 41).
• GE pilot light and push button removal tool, catalog
number GEN-1684A (see Figure 42).
• EntelliGuard TU Digital Test Kit, catalog number
GTUK20 (see Figure 43). The Test Kit may also be
used to temporarily defeat the ground-fault function
during primary injection (high-current test set).
• Allen wrench in size 5/32 inch or #4 metric for
defeating the door interlock.
Figure 41. Rating plug removal tool, catalog number TRTOOL.
De-energize all equipment before performing any
maintenance operation. There may be voltage
present within the equipment from remote
sources, even though all main- and branch-circuit
disconnects have been opened at the equipment.
Failure to observe this precaution can result in
serious injury or death.