Exide Technologies Section 95.10 - Manual (Page 8)

5.6 OPEN CIRCUIT VOLTAGE CHECK
The voltage of each unit should be checked to insure the voltage is at least 12.6 volts. If
any unit has a voltage lower than 12.6 volts, follow the initial charge procedures shown in
Section 8.
SECTION 6 - RACK SYSTEM - INSTALLATION
6.0 PLACEMENT OF UNITS ON RACK
When installing units on a rack, start on the lower tier for stability and safety reasons.
Place units on the rack so that the positive (+) of one unit is connected to the negative (-)
of the next unit. Standard spacing is 12mm (1/2 inch) minimum between units.
Determine the number of units to be placed on each row. If a row of units does not fill the
entire rack length, fill the remaining space with foam cell spacers in seismic
installations.
SECTION 7 - ELECTRICAL INSTALLATION CONSIDERATIONS
7.0 CONNECTING CABLES: BATTERY SYSTEM TO OPERATING EQUIPMENT
Battery performance is based on the output at the battery terminals. Therefore, the
shortest electrical connections between the battery system and the operating equipment
should be used for maximum total system performance. A terminal plate kit should be
utilized when connecting multiple cables to a battery terminal post.
DO NOT SELECT CABLE SIZE BASED ON CURRENT CARRYING CAPACITY ONLY.
Cable size selection should provide the lowest voltage drop possible between the
battery system and operating equipment. Excessive voltage drop will reduce the desired
support time of the battery system.
7.1 PARALLELING
Where it is necessary to connect battery systems in parallel to obtain sufficient capacity,
cable connections from the bus/load to each of the parallel strings is preferred rather than
inter-string paralleling. The maximum number of parallel strings recommended by GNB in
high rate applications is 4.
Cables should be sized to minimize voltage drop, and for proper current carrying
capability. They should be as short as possible. However, the lengths of cables for all of
the systems being paralleled to the load should be equal in length and size to provide
proper load sharing on discharge plus satisfactory recharge with the same float voltage
per string. Care should be taken to ensure the overall resistance of the connection
between batteries and equipment bus are consistent between strings.
7.2 CONNECTION PREPARATION
Gently clean contact surfaces only by using a brass suede brush, 3M Scotch Brite ®
Green scouring pad, or #00 grade steel wool being careful not to remove lead plating
from inter-unit connectors. Immediately after contact areas are cleaned, apply a thin coat-
ing of NO-OX-ID
® “A” grease to these surfaces only.
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