MODEL A33
MANUFACTURERS AND ORIGINATORS OF THE WORLD’S MOST COMPLETE LINE OF BATTERY CHARGERS
GENERAL DESCRIPTION
The model A33 float charger/power supply is approved
for application as a component of fire protection signaling
systems. Solid state design provides constant voltage
output plus A.C. input compensation and current limiting.
Designed to carry continuous and intermittent loads up to
maximum rated output.* Current limited at 140% of rated
output. The A33 charger section is designed and set to
charge a specific type of battery containing a stated
number of cells.
The La Marche Transistor Controlled magnetic amplifier
circuits provide continuous taper charging.
Maintains rated output voltage within -I1% from no load
to full load with A.C. input variations of " 10°’,.
Silicon diodes are used for rectification. Regulation off
the battery, less than 5%.
The model A33 charger floats lead-acid batteries at 2.17
volts per cell and by means of a front panel switch
equalizes at 2.33 volts per cell. Both float and equalize
voltages are adjustable to meet battery manufacturers
recommendations. This type of charging imparts the
longest battery life and is the accepted method for
charging batteries used in standby service.
*Independent, fused output terminals for charger and
power supply hook up.
GUIDE BBGQ2 Component-Battery Charger
GUIDE UTRZ Power Supply
File Number E25071
DESIGN FEATURES
1. Quality parts throughout. Silicon diode rectifiers
and transistor magnetic amplifier used exclusively.
No aging adjustment
2. A.C. power loss relay, output voltmeter/ammeter
and fused input-output are standard on all models.
3. Seventy sizes available in five input voltages.
4. Adjustable equalize and float levels, float/equalize
controls located on face panel for easy operation.
5. Design and operation tested and approved by
battery manufacturers, alarm manufacturers and
utilities.
