switchgear equipment preventive maintenance check off list.
1.
Disconnect primary power from switchgear.
2.
Disconnect control power except for Items 9, 10, and 19.
3.
Check exterior of equipment for damage.
4.
Check equipment ground bus and its
connection(s) to station ground.
5.
On outdoor switchgear, check integrity of seal against weather and rodents.
6.
Check doors for damage.
7.
Check door handles, locking bars, keys and
interlocks for positive operation.
8.
Insure structure is tight.
9.
Check cabinet lighting (if present).
10.
Check heaters and heater circuits (if present).
11.
Check that all power and control cable
entrances are sealed against rodents and fire contaminants.
12.
Check all wiring connections, including those on terminal blocks.
13.
Check draw-out racking mechanisms (also
check lubrication).
14.
Check shutter mechanism.
15.
Inspect bus and support insulators for
evidence of corona or insulation deterioration
16.
Megohmmeter test switchgear
lightning arresters (if present).
17.
Check control knobs and switches for freedom of movement and contact condition.
18.
Check mechanical and electrical integrity of all relays
19.
Perform sequencing check of
protective, auxiliary, and control
relays.
20.
Inspect switchgear instruments
(meters, switches, and indicating
lights).
21.
Inspect all instrument transformers.
22.
Inspect all fuses.
23.
Inspect and check batteries and battery
charging equipment (perform a load test).
24.
Clean all compartments and bus sections.
25.
Lubricate racking mechanism, if not done
under Item 13.
26.
Check to insure that all key interlocks are
operational and no spare keys are used.
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