TM 55-1930-209-14&P-9-1
3-14 . Return to normal power source. When normal power becomes available, holding voltage will be returned to one
side of inverter Inverter reverts to active standby and normal 120 Vac is again supplied to emergency lighting panel. The
24 Vdc being supplied from the battery bank to the DC panel in the workshop continues without change.
a.
Check battery charger instruments to verify that battery bank is being recharged.
b.
Check that marine radio and telephone station buzzer system are working properly.
3-15 . Shutdown procedures
3-15.1
Normal shutdown procedures. When all electrical power is to be terminated and emergency system is not
needed, shut down as follows:
a.
On DC panel, open (ON) circuit breakers 10P14 thru 8P14 and fused circuit 9P14A.
b.
On emergency lighting panel, verify that circuit breakers 10P1 3A-1 thru 10P1 3A-8 are open (OFF).
c.
On inverter, turn ON/OFF switch to OFF.
d.
On battery charger, turn to OFF.
e.
On power panel 3 (120 Vac) open circuit breaker 1 OP1 3.
WARNING
Fumes from battery electrolyte may be flammable and explosive. Do NOT smoke
or have open flames when checking electrolyte or working on batteries.
f. Check batteries in battery bank and make sure electrolyte is above plates in each cell of each battery.
g.
Clean all major components of system. See maintenance procedures in paragraph 2-23.1.
3-15.2
Emergency shutdown procedures. Operating either system shutdown or total shutdown buttons does not
affect the emergency power system.
3-16 . Operation under extreme conditions. Extreme temperatures may have an adverse impact on the battery bank
Since it is on the deckhouse top, battery bank is exposed to high dimatic temperatures. This exposure increases
evaporation of electrolyte from batteries and requires more frequent checks of electrolyte level and specific gravity.
WARNING
Fumes from battery electrolyte may be flammable and explosive. Do NOT smoke
or use open flames when checking electrolyte or working on batteries.
a.
Check electrolyte levels daily and make sure it covers plates in each cell of all batteries.
WARNING
Electrolyte presents potential health hazards. Contact with eyes and skin should
be avoided. Safety glasses, gloves, and rubber aprons must be worn when
handling this material. Electrolyte contains sulfuric add, can cause severe bums,
and Is highly toxic to eyes, skin, and respiratory system.
b.
Check electrolyte specific gravity weekly. Constant evaporation and adding of water may dilute
electrolyte and require complete replacement of electrolyte periodically to rejuvenate a battery.
3-11
