current limit chargers for sealed lead-acid type batteries.
Operating temperature range
0 ºC to 40 ºC (32 ºF to 104 ºF); suitable for 105
to 129 VAC, 60 Hz. input; voltage regulation +/- 1.5% for line and load
current up to nominal current rating.
on "A"-type chargers - 250 & 500 series: "POWER ON" and "CHARGING
MODE" (ON for high-rate charging, OFF when float charging). 300, 800, 4000
and 10A series: "FLOAT" to indicate charging at float voltage, "FAST CHARGE"
to indicate high-rate charging. On 2000 and 4000 series: single tri-color
for 250 and 500 series, I/O cord with battery connectors for 300, 800,
4000 and 10A series chargers.
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.