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Y-30C 24
3. ELECTRIC SYSTEM:
3-1. BATTERY:
The power for the lights aboard and engine starting is supplied by 12·volt storage batteries.
The engine js equippect with a 12V-35A alternator with IC regulator made by Hitachi. This system
rapidly charges the battery until it reaches capacity and then shuts itself down and provides only a
trickle charge to keep the battery full charged.
The stowage for two 100 AH batteries is located In the fo'csle on the both sides of the engine com-
partment. Eye straps are fitted and lashing straps are enclosed for lashing purpose. Lash down the
batteries to the hull.
NOTE: (1) lNSTALLATlON:
1)
MAKE SURE THAT THE BATTERY SWITCH IS TURNED OFF.
2) WHEN YOU CONNECT THE CABLES TO THE BATTERY TERMINALS, BE EX-
TREMELY CAREFUL. FIRST CONNECT THE POSITIVE CABLE (RED) TO THE
POSITIVE TERMINAL MARKED (+),THEN THE NEGATIVE.
FAILURE OF THIS RESULTS THE DAMAGE OF IC REGULATER IN THE AL-
TERNATOR IN A MOMENT.
3-2. BAnERV SWITCH:
The battery swltch Is located on the butkhead to starboard In the forecastle. The basic wiring
diagram is shown in Fig. 22.
The battery switch will control;
a) which battery you are going to start the engine with and
b) which
battery will be charged.
This is done by switching the battery selector switch from "OFF' to position "1
''or ..
2".
NOTE: 1)
WHEN
YOU
START
ENGINE,
TURN THE
SWITCH TO "1" OR "2" NO MATTER
HOW YOU START IT BY HAND OR NOT. EXCEPT THE CASE YOU DIS-
ENGAGED THE ALTERNATOR FROM THE ENGINE.
2) THE "BOTH" POSITION SHOULD NOT BE USED UNLESS NEITHER BATTERY
HAS SUFFIC,ENT POWER BY ITSELF TO START THE ENGINE.
3) STOP THE ENGINE BEFORE
SWITCHING.
FAILURE
OF
THESE
MAY
RESULT
THE
DAMAGE
OF
THE ENGINE
ALTERNATOR.
4) WHEN YOU SHUT DOWN THE ENGINE AND POWER IS NO LONGER NEEDED,
TURN THE BATTERY SWITCH OFF.
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