Evolution Series E9000 User Manual
Chapter 5 – Maintenance
25
Equipment Maintenance
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.
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.
Inlet Filter Maintenance
Filter inspection and cleaning must be carried out every
six months or more frequently as per your established
maintenance plan. The frequency of filter maintenance
or replacements should be determined individually,
depending on dust accumulation and operating period.
Note: A soiled filter mat will cause the temperature to
rise inside the enclosure. The filter mat can be regener-
ated by washing or blowing out.
Arc Resistant Maintenance
If a unit is removed from an Arc Resistant section for
maintenance, a solid blank door should be used to
cover the opening in order to maintain arc resistance.
Control Power
The option to have control power or test power during
service is a functionality that has been provided with
the Arc Resistant introduction of the LV MCC. This is a
necessary requirement in order to check functions during
service such as pilot lights and devices. This is intended
to standardize the offerings when a customer orders
common control power on the MCC. The two options we
provide allow for 1) customer supplied 120VAC power
or 2) self-contained control power within the MCC.
The key switch is utilized to operate the control power
when the stabs are disengaged. The key switch is turned
“On” allowing the secondary control power to be utilized.
The key switch should be “Off” during normal operation
of the MCC.
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
