“A-C” series chargers are new “switching” type devices which
operate without the use of transformers. I.C.’s control and
regulate current and voltage and automatically switch from the
higher fast charge voltage to the lower float voltage when
batteries are very close to being fully charged. At the float
voltage it is safe to leave the battery connected to the charger
indefinitely, making charging pretty much fool-proof.
In the fast charge mode voltage goes up to 2.45V +/- 0.05V
before switching, in the float charge mode voltage is held
between 2.25- 2.30V/cell.
This charger is ideal for cyclic applications where recharge
time is critical and timely charge termination cannot be counted
on. This charger ensures optimum battery performance & service
A-C Series Specifications Sheet
Float chargers are designed to provide optimum life for batteries used
in standby applications where charging is continuous. The chargers deliver
a constant voltage of 2.25 to 2.30 volts per cell which allows the battery
to seek its own current level and maintain itself in a fully charged condition.
This series is best suited for burglar and fire alarm equipment, emergency
lighting, memory protection or UPS systems where the battery serves as
back-up power to th AC source.
Automatic dual rate chargers sense battery requirements and automatically
switch from the fast charge to float mode, or vise versa. LED's provide
visual indication of the charging mode. Automatic chargers combine the
advantages of float and cycle chargers; recharge time is short yet batteries
are safe from being overcharged. This charger is safe for cyclic applications
where recharge time is critical and the battery may be left on charge indefinitely.
As a result charging is fool proof.
Recharge time depends on the depth of the preceding discharge and the
output current of the charger. To determine the approximate recharge time
of a fully discharged battery, divide the batteries capacity stated in
amp. hrs. by the rated output current of the charger (amps) and multiply
the resulting number of hours by a factor of 1.75 to compensate for the
declining output current during the charge cycle. If the amount of amp.
hrs. discharged from the battery is known, use it instead of the batteries
capacity to make the calculation.
|When charging batteries in series
(positive terminal of one battery is connected to negative terminal
of the other) all batteries in the string will receive the same amount
of charge current, individual battery voltages may vary.
|When charging batteries in parallel
(positive terminals are connected with positive terminals, negative
terminals with negative) all batteries in the string are subject to the
same charge voltage, but the charge current each battery receives can and
will vary until equalization is reached.