www.nationalrailwaysupply.com
1-800-357-3572 4
31318G
to 3, and the bottom switch to 8 (see the figure 8.1).
This will provide you with the proper charging
voltage. The tens digit is always a one (1) and
cannot be changed.
BE SURE EACH SWITCH IS
SET ON A NUMBER AND NOT BETWEEN
NUMBERS.
If a switch is set between numbers, the
output current will go to zero and the yellow charging
LED will flash.
The charger does not have a power switch. When
the AC power is applied to the charger, the DC
output will start and the yellow LED will be on. To
turn off the charger, disconnect the AC power
source.
Figure 8.1
9. MAINTENANCE
The battery charger requires minimal maintenance.
It should be kept clean and all connections are to be
periodically tightened.
BE SURE THE CHASSIS IS
SECURELY GROUNDED.
If any problem cannot be
resolved, consult the nearest NRS service agent at
1-800-357-3572.
10. SERVICING
If the battery charger operates improperly, follow the
steps below.
a. Begin by checking the voltage switches to
verify their settings against the specifications
of the batteries.
b. Check the AC voltage selection switch for
the proper setting.
c. Check the fuses to make sure they have not
blown.
d. Check the circuit breaker to see if it has
opened and push it in to reset it, if
necessary.
e. Check the polarity between DC output and
the battery and make sure their connections
are tight.
f. Remove the small cover on the front of the
charger and make sure all of the binding
posts nuts are tight.
g. If the steps above do not solve the problem,
contact your local NRS service agent at 1-
800-357-3572.
11. CHARGER SPECIFICATIONS
AC INPUT VOLTAGE:
115 Vac (108-128) or 230 Vac (216-256)
ELC-12/20-D
115 Vac (108-125) ELC-12/20-S
AC INPUT CURRENT:
6 amps for 115 Vac (full power)
3 amps for 230 Vac (full power)
AC INPUT FREQUENCY:
50/60/100 Hertz (single phase)
AC LINE REGULATION:
For a constant output current at 2.23 volts/cell
+17% for 6 cells
AC FUSES:
MDA 4 or equivalent ELC-12/20-D
MDA 8 or equivalent ELC-12/20-S
POWER FACTOR:
Percentage at 20.0 amps DC current
56% at 13.38 volts
DC OUTPUT:
Voltage range
10.00 – 17.00 + 0.1 volts
Current Maximum 20.0 +
.
5 amps
DC OUTPUT RIPPLE (at battery terminals):
0.25V p-p at 20.0 amps, 12.0 volts
0.1V p-p at 2.0 amps, 13.38 volts
TEMPERATURE COMPENSATION:
3mV
per
°
F per cell
WEIGHT, NET:
30.2
lbs.
