Table 9-3. Preventive Maintenance Checks and Services for Electrical Power Systems(Continued)
Q - Quarterly
S - Semiannually
A - Annually
CHECK FOR AND HAVE
IS NOT READY/
REPAIRED OR ADJUSTED
B D A D W M Q S A
4) Clean circuit breakers, contacts and
relays with fine sandpaper to remove
black discoloration. Do NOT use
5) Clean arc chutes on circuit breakers
with a fine file. Vacuum to remove
Fumes from battery electrolyte may be
flammable and explosive. DO NOT
smoke or have open flames when
checking electrolyte, or when working
on battery bank. Avoid contact with
eyes and skin. Wear safety glasses,
handling electrolyte. Electrolyte is
respiratory system and can cause
a. Check batteries in bank for proper elec-
trolyte level. Add distilled water or clean
water to bring level above plates.
b. Check that battery bank is secure and
that electrical cable fittings are tight and
coated with anti-corrosion grease. Cor-
rect as necessary.
c. Check for damage and loose fittings,
wires and fasteners. Replace or tighten
damaged or loose.
d. Wipe all battery components clean.
e. Replace defective status lamps.
f. Check electrolyte level daily and make
sure it covers plates in each cell of all
g. Visually check for loose or damaged
Cables loose or
cabling. Make sure cabling is firmly
attached, free of corrosion, and not sub-
ject to rubbing or chafing.
h. Check for loose or damaged electrical
-connections, switches, wiring, mounting
systems, hangers, and insulating mate-
wiring, and mount-
rial. Repair, replace, or tighten as neces-
ing systems loose
sary using insulated tools.