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23
Maintenance
01.4IB.26263B
Ch 5 Maintenance
A. G
enerAl
Contact Powell Service Division for assistance
in performing maintenance or setting up a
maintenance program. Email
[email protected] or call 1.800.480.7273.
A regular maintenance schedule should be
established which obtains the best service
and reliability from the switchgear. Plant
operating and local conditions will dictate the
frequency of inspection required. For specific
information regarding the maintenance of
devices, removable elements, such as circuit
breakers, relays, motors, etc., refer to the
separate instruction bulletin furnished with
each device. The test cabinet, when furnished,
provides a convenient means for maintaining
the circuit breakers. Under normal conditions,
the protective relays do not operate, therefore,
it is important to check the operation of these
devices regularly.
A permanent record of all maintenance should
be kept, and the degree of detail depends
on the operating conditions. In any event, it
will be a valuable reference for subsequent
maintenance, and for station operation. It is
recommended that the record include the
reports of tests made, the condition of the
equipment, repairs, and any adjustments
that were made. Test data from successive
maintenance interval should be compared, to
note any significant changes in the condition of
the switchgear.
When performing maintenance the power
source must be disconnected and the
equipment grounded. Failure to do so may
result in death or serious injury.
!
WARNING
The primary circuits of metal-enclosed
switchgear are insulated in order to reduce
the size of the equipment. However, this
insulation, in most instances requires a certain
amount of air gap between phases and to
ground, which completes the insulation.
Do not place any object in this air space
when energized. If done, it could result in
equipment damage and/or minor or moderate
injury to personnel.
!
CAUTION
B. o
verAll
M
AIntenAnce
p
rocedureS
The switchgear lineup and connections should
be given the following overall maintenance at
least once a year.
Powell offers a complete lubrication kit
(Powlube-104) which contains all the
lubricants required for maintaining Powell
equipment. Powlube-104 consists of (1)
A-grease, (1) B-grease, and (1) C-oil. Prior to
March 2014, Powell provided Powlube-101
and Powlube-102 which contained (1) tube
of Anderol 757 or Rheolube 368A, (1) tube of
Mobilgrease 28, and (1) bottle of Anderol A456
oil.
A-grease should be lightly applied to
those bearing surfaces that are accessible.
Inaccessible surfaces, such as bearings, may be
lubricated with a light synthetic machine oil
such as C-oil. B-grease should be applied to
the electrical contact surfaces.
For all previous lubrication requirements
Powlube-104, A-grease replaces Anderol
757 and Rheolube 368A, B-grease replaces
Mobilgrease 28, and C-oil replaces Mobil 1 and
Anderol 456A.
