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DEH-41473
Section 10. Maintaining the Switchgear
General
DANGER: Electrical arc flash hazard. Personal
protection equipment required. Turn off power to the
equipment before working inside.
DANGER: Solid insulation surrounding an energized
conductor and power apparatus must never be relied upon
to provide protection to personnel.
A periodic maintenance schedule must be established to
obtain the best service from the switchgear. An annual check
of the switchgear devices and all connections should be
made as a minimum requirement. Equipment subject to
highly repetitive operation may require more frequent
maintenance.
A permanent record of all maintenance work should be kept.
The record should include a list of periodic checks and tests
made, the date they were made, the condition of the
equipment, and any repairs or adjustments that were
performed. Maintenance employees must follow all
recognized safety practices, such as those contained in NFPA
70B: Electrical Equipment Maintenance, and NFPA 70E:
Standard for Electrical Safety in the Workplace and in
company or other safety regulations.
For specific information regarding the maintenance of
devices, such as circuit breakers, relays, meters, etc., refer to
the separate instruction manual furnished for each device.
©2016 General Electric. All rights reserved.
Courtesy of NationalSwitchgear.com
AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 10. Maintaining the Switchgear
Circuit Breaker and Instrument
Compartments
DANGER: Electrical arc flash hazard. Personal
protection equipment required. Turn off power to the
equipment before working inside.
WARNING: Primary equipment must be completely de-
energized while tests on control circuits, etc. are being
conducted. Be sure that all areas of feedback from
secondary circuits, as well as outside power sources, are
disconnected.
Periodic inspection of the circuit breaker is recommended at
least once a year. More frequent inspections are
recommended where severe load conditions, dust, moisture
or other unfavorable conditions exist, or if the vital nature of
the load warrants it. Always inspect the breaker after a short-
circuit current has been interrupted.
Circuit Breaker
Test for Proper Operation
Test and inspect all circuit breakers for proper operation as
follows:
1.
Operate each breaker while in the TEST position and
check all functions. This is particularly important for
breakers that normally remain in either the opened
or closed positions for long periods of time.
2.
Remove the breakers from their compartments to a
clean maintenance area. Close compartment door
and cover the breaker cutout to prevent access to
live parts.
WARNING: When a circuit breaker is removed from its
compartment. The future cassette barrier and the future
breaker door cover must be installed and the circuit breaker
compartment door closed and latched to maintain the
integrity of the arc resistant enclosure.
WARNING: De-energize the equipment completely
before doing maintenance work on any devices,
connections, bus work, breaker or feeder cable
compartments. This includes de-energizing any
connections to outside primary or secondary sources, such
as transformers, tie lines, etc.
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