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Commissioning
Once connected to the battery connections on Module B and the mains
connection on Module A, the Module B is operative. To supply the 12 volts
consumer actuate the main switch.
Before breaking or making direct-current connections, e.g. the charging cable at
the battery, the device be switched off at the mains. Pull out the mains plug.
1
Charging a battery
Explosive gases (oxyhydrogen) are produced if charging is carried out with a
short-circuited battery, or when the automatic charging controller is non-
operational. Therefore it is necessary to ensure sufficient external ventilation in
the battery space. Avoid sparks and open flames!
Prerequisites
The battery must have a rated voltage of 12 volts and a minimum capacity of 55
- 160 Ah when using the MES 250-(1-4) / Module A and a minimum capacity
of 90 - 270 Ah when using the MES 400-(1-4) / Module A. Insufficient
charging takes place if the battery is below this value. Batteries with a capacity
that is too high are charged too slowly.
Attention
Batteries with short-circuited cells must
not be charged. Explosion hazard due
to the generation of oxyhydrogen gas!
Charging process
Battery charging proceeds automatically. After a mains failure, the main
charging process is automatically started again. The main charging process ends
when a battery voltage of 14.4 volts is reached. After the post charging phase,
the device switches to holding charge of constant 13.8 volts. During buffer
operation, consumer current should be lower than the maximum charging
current 16A when using a MES 250-(1-4) / Module A and of 27A when using
an MES 400-(1-4) / Module A. This is the only way to ensure that the battery is
being charged even though consumers are being supplied.
