14
2.6
Load Sharing
All A36D
chargers include the Load Sharing feature. Load sharing allows the user to parallel with any identical
A36D to share a DC load and therefore reduce the strain on each charger. When connected, identical A36D
chargers are forced to share the load within ±5% for individual unit outputs greater than 10% of the rated output.
Chargers to be paralleled
MUST
be the same output (voltage and current).
Load Sharing Procedure
Before making any connections to the A36D, ensure that the AC power is off at the main breaker box and that all
of the chargers’ breakers are off. Verify that no voltage is present by using a voltmeter at all input and output
terminals.
1.
Connect the DC output of all chargers in parallel to the same DC load/battery.
2.
Locate terminal strip
TS-5
inside the chargers.
3.
Connect the
LS
terminal of one charger to the
LS
terminal of the next charger. Refer to the figure above.
4.
Once batteries are fully charged and/or loads are stabilized, turn OFF all chargers except for one.
5.
Take a voltage reading on the output of the charger.
6.
Turn on the next charger, turn off the first charger.
7.
Set the output voltage of the next charger to match the first by adjusting the Float voltage using the settings
menu (refer to Section 3.4.1.1)
.
8.
After all chargers have been adjusted, turn ON all chargers.
9.
Follow the same procedure for setting the Equalize voltage.
2.7
Remote Equalize
A terminal is provided on charger (RE) for a Remote Equalize function. The charger may be remotely forced into
Equalize by connecting the “RE” terminal (on TS-5 terminal, as shown on the figure above) to negative DC bus.
Caution:
Damage to the unit will result if the Remote Equalize Terminals are shorted to any other AC or DC
voltage source or ground on positive grounded chargers. In a system, all charger “RE” terminals are
connected together and when any one master charger is put into Equalize, all chargers will go into
Equalize and display will read “RE”. To return to Float Mode, this master charger must be returned to
the Float Mode.
NOTE:
Remote equalize can only be used with other A36D battery chargers.
2.8
Remote Voltage Sensing
Provisions for remote DC voltage sensing are provided. The sensing circuit is activated when wires from the
battery or load are brought back to Terminals RS + (RSP) and RS- (RSN) of the charger remote sensing circuit.
Positive must be connected to Terminal RS+, negative to Terminal RS- (refer to Figure 12). The positive sense
lead should contain an external 1-amp fuse for negative ground system. The negative sense lead should be fused
for positive ground system.
When remote sensing is wired, the unit output may have to be readjusted to compensate for the protection diodes
on the circuit board.
CAUTION: The polarity of the sensing terminals is critical. Check and verify the polarity carefully.
Figure 12 –
Load Sharing Connection
(Schematic Wiring)
