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26
Maintenance
01.4IB.26264A
FlexGear
™
Low Voltage Arc Resistant Switchgear
The switchgear lineup and connections should
be given the following overall maintenance at
least once a year:
NOTICE
A periodic maintenance program is not
intended to cover reconditioning or major
repair, but should be used to determine if
such service is required.
NOTICE
If optional shutters are included with the
equipment, refer to the applicable section in
the appropriate circuit breaker instruction
bulletin to verify shutter operation.
1) Equipment
Clean the equipment thoroughly, removing
all dust and other accumulations. Wipe the
buses and supports clean. Refer to
for cautions about cleaning
bus insulation. Inspect the buses and
connections carefully for evidence of
overheating or weakening of the insulation.
2) Bus Insulation
The primary circuit bus bar is insulated
with a high temperature thermoplastic or
thermoset material that provides dielectric
and mechanical properties. Clean the
insulation to provide optimum insulation
properties.
Only use denatured alcohol or isopropyl
alcohol to clean the insulation. Wear
protective gloves and goggles and clean
the main bus bar in a well ventilated area.
Wipe dirt or other foreign matter from the
insulation with a clean cloth saturated with
only denatured or isopropyl alcohol.
Inhalation of vapor could result in minor or
moderate injury.
!
CAUTION
Use only the cleaners recommended in this
document. Failure to do so could result in
equipment damage.
CAUTION
3) Mechanisms
Clean mechanisms and lubricate wear
points. The application of lubricants
should be held to a minimum to reduce the
accumulation of dust and dirt.
Refer to the instruction manual furnished
with the removable device for lubrication
instructions.
4) Primary Disconnect Device Contacts
Check primary disconnecting device
contacts for signs of abnormal wear or
overheating. Discoloration of the silver
surfaces is not ordinarily harmful unless
atmospheric conditions cause deposits,
such as sulfides on the contacts. Apply a
thin coat of contact lubricant to the main
contacts per the appropriate instruction
manual before replacing the circuit breaker.
5) Control Contacts
Contacts should be inspected and dressed
or replaced when the surface becomes
seriously pitted. Unless repetitive duty has
been experienced, little attention should be
required.
