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DIP SWITCH GROUP B (Available on Select Models)
LOAD SHARING/EQUALIZE BATTERY CHARGE
Using a small tool, set the "Load Sharing" Configuration DIP Switches, #1 and #2 of Group B (located
on the front panel of your APS; see Diagram 1, p. 33). DIP Switch #3, Group B should be kept in
the "UP" position when you are not equalizing your batteries' charges. DIP Switch #4, Group B
has no function.
• Load Sharing
(DIP Switches #1, Group B & #2, Group B)
Your APS features a high-output battery charger that can draw a significant amount of power
from your line power source when charging at its maximum rate. If an APS is supplying its full
AC power rating to its connected load at the same time as it is charging, it could trip its line source
circuit breaker. Tripping this breaker will cut off AC power to your load and stop battery charging.
To reduce the chance of tripping this breaker, select APS models may be set to automatically
limit their charger output to help keep the sum of their AC load and charger power within their
line source circuit breakers' rating.
This charger limiting function has four settings, allowing you to choose less charger limiting for
APS configurations with higher rated breakers. The figures below show how to set your DIP
Switches to select how heavy a load can be placed on your APS before charger limiting begins.
For suggested settings based on your APS model and breaker ratings, see specifications.
• Equalize Battery Charge
(DIP Switch #3, Group B)
This DIP Switch is momentarily engaged to begin the process of equalizing the internal
resistance of your battery's cells. This can extend the useful life of certain types of batteries;
consult with your battery's manufacturer to determine if your batteries could benefit from this
process. The charge equalization process is automatic and once started can only be stopped
by removing the input power.
SETTING PROCEDURE:
1) Move to "Equalize" (DOWN) position for three seconds.
2) Move to "Reset" (UP) position and leave it there.
CAUTION: Battery charge equalization should only be performed in strict accordance with
the battery manufacturer's instructions and specifications.
CAUTION: Do not leave DIP switch #3 in the down position after beginning process.
Battery Charge Switch Position
Reset ........................................................... Up*
Equalize ....................................................... Down
* Factory default settings.
Reset
Equalize
Load Sharing: Battery Charger Limiting Points
Charger limiting takes effect the
moment any load is applied;
charger output falls gradually
from full output at no load to no
output at full load.
Most Limiting
#1 & #2 Up
Least Limiting
#1 Up & #2 Down
Less Limiting
#1 Down & #2 Up
No Limiting
#1 & #2 Down*
Charger limiting begins when the
APS's load reaches 33% of the APS's
load rating. Charger output falls
gradually from full output at 33%
of the APS's load rating to about
40% of full output at full load.
No charger limiting occurs at any
load size. This is the factory de-
fault setting.
Charger limiting begins when the
APS's load reaches 66% of the APS's
load rating. Charger output falls
gradually from full output at 66% of
the APS's load rating to about 40% of
full output at full load.
9906058 230V APS MV-cabinet--English.p65 3/21/00, 4:29 PM6