1 INTRODUCTION
Automatic battery chargers should meet the general requirements set out in
regulation IV/13 of SOLAS 1974, as amended, and in resolution A.694(17), as applicable and should also comply with the following
requirements.
2 GENERAL
2.1 The charger should be capable of recharging the completely discharged accumulator
batteries to the minimum required capacity within 10 hours.
2.2 The charger should be capable of keeping the batteries appropriately charged as
prescribed by the battery manufacturer for permanent automatic charging.
2.3 The supplied voltage and current should always be within the tolerance limits
prescribed by the battery manufacturer, taking into account the environmental
temperature of the battery, likely to be experienced in ship. A protection should be
provided against over charging or discharging of batteries from a possible fault in the
charger.
3 CONTROL AND INDICATORS
3.1 The automatic charger should be provided with a visual indication that it is switched
on.
3.2 Provision should be made for an aural alarm and visual indication at the position
from which the ship is normally navigated, indicating when the charging voltage or
current is outside the limits given by the battery manufacturer for automatic charging
conditions. It should not be possible to disable this alarm and indication and it should
only be possible to acknowledge and silence the alarm manually. Both the alarm condition
and indication should reset automatically when normal charging condition has been
restored. Failure of the alarm system should not interrupt the charging or discharging
of batteries.
4 READINESS
The automatic charger should be operational within five seconds of switching on or after
a power supply interruption.
5 SAFETY PRECAUTIONS
The automatic charger should be so designed and constructed that it is protected against
damage resulting from disconnecting the batteries or, with the battery disconnected,
short-circuiting the battery connections. If this protection is provided by electronic
means it should automatically reset following removal of the open or short-circuit
conditions.