Table of Contents
Advertisement
SPECIFICATIONS
OPERATION
The battery charger can be operated as a stationary
or portable unit for charging either lead-acid or
nickel-cadmium batteries. The electronic voltage
sensor checks the battery voltage after every half
cycle. If the battery voltage is below the reference
voltage level, the sensor turns on the silicon con¬
trolled rectifier to supply charging current from the
full wave bridge rectifier. The charge rate tapers to
zero current as the battery becomes fully charged.
The charger may be connected on a continuous
basis to maintain the battery in a fully charged
condition.
Discharged battery must provide a minimum of 4 volts to allow
charger to operate property.
Modes of Operation
The charger has two modes of operation: (1) equal¬
ize charge, and (2) float charge. The manually set
equalize charge timer (Figure 3) raises the charger
output voltage for a selected time period up to 12
hours. The charger returns to float charge at the end
of the selected time period.
VOLTMETER
AMMETER
FIGURE 3.
BATTERY CHARGER
FRONT PANEL COMPONENTS
DC VOLTAGE OUTPUT
12 VOLT
24 VOLT
MODEL
120-208-240VAC
305-0347/-0707
305-0346/-0706
NO.
440-480 VAC
305-0395/0709
305-0398/0708
Available Input VAC
120-480
120-480
Output Amp, DC
10
6
Regulation
±2%
±2%
DC Voltmeter
0-20
0-40
DC Ammeter
0-10
0-10
Timer (hrs.)
0-12
0-12
Dimensions (in.)
10x8x8
10 x 8 x 8
Weight (lbs)
23
27
* - Within ±10% line voltage and ±3 Hz of nominal frequency.
Charging Batteries
Plug in the charger to the AC line voltage source
(120 through 480 as required). Connect battery lead
wires to battery terminals, positive (+) and negative
(-) to negative, and turn on charger. The factory
adjusts the charger float and equalize voltages to
the values shown in Table 1. Refer to the ADJUST¬
MENTS section if any adjustments to the charging
voltages are necessary.
Any number of batteries may be connected to the
charger. For faster charging, connect two battery
chargers together in parallel. The charger with the
highest pre-set voltage will control the voltage of
the battery.
Turn on equalize charge timer to rapidly charge
batteries or to equalize the battery. Most lead-acid
battery manufacturers recommend 24 hours of
equalize charging each month. Use the equalize
charge timer to periodically equalize float charged
lead-acid batteries. Nickel-cadmium batteries do
not require equalize charging.
Controls
ON-OFF Switch: De-energizes both the AC and DC
circuits of the charger.
Equalize Charge Timer: Use to rapidly charge bat¬
teries or to equalize charge the battery. Timer can
be set for up to 12 hours.
DC Ammeter: Indicates the charger output current
DC Voltmeter Indicates the terminal voltage of the
battery.
Fuse: Replaceable tubular type fuse protects the
transformer and rectifier circuits from excessive
overloads (15 amperes for 12 volt 10 amperes for 24
volts).
TABLE 1. FLOAT/EQUALIZE VOLTAGES
Lead-Acid Batteries
Battery
Voltage
•Float
Voltage
Equalize
Voltage
12
13.3
14.4
24
26.6
28.8
Nickel-Cadmium Batteries
Float Voltage Charge Per Cell
1.38 to 1.45
Example: Float charge for 10 cell
battery should be 13.8 to 14.5 volts.
•Voltages shown are for ambient temperatures of 50°F (10°C) to
85° F (30° C). Reduce float voltage by 1% for every 9°F (5°C)
above 85° F (29°C). Increase float voltage by 1% for every 9°F
(5°C) below 50° F (10°C).
2
Advertisement
Table of Contents
