Alpha Technologies AlphaCell OPzS - Manual (Page 15)

15 OPzS-BATTERY
5.0 Selection and Accommodation Considerations
5.1 General
If you have any questions concerning the battery selection and installation considerations,
contact your local manufacturer’s representative or Alpha Technologies Customer Service.
5.2 Battery Selection
To correctly match your battery needs with the correct battery, please consider the following
information:
Type of consuming device (telephone plant, DC-AC converter, emergency lighting etc).
Operating energy of the consumer (kW, kVA, cosf).
Minimum and maximum allowable rated voltage at consuming device (V).
Time diagram of a consumer load, and the required time autonomy (reserve).
Expected voltage drop in the supply lines - surrounding temperature in the battery room
(average, minimum, maximum).
Type of rectifi er, its characteristics, regulating point I (A) or U (V), respectively, fl oat
voltage (V) (direct voltage of rapid-charging current Imax (A), fl oat charging voltage).
Outline or dimensions of the battery room.
Type of installation (welded, bolted, on wooden or metal racks, in case, on earthquake-
proof racks).
Battery maintenance accessories (V-meter, areometer (hygrometer), thermometers).
5.3 Accommodation Considerations
When planning the system accommodation for fl ooded stationary batteries consider following:
Space: The aisle space provided in front of all racks should be a minimum of 36 inches (915
mm), where this dimension is not in confl ict with any local codes or regulations. A minimum
of 9 inches (230 mm) is desirable above the tops of the cell posts of the top row of cells
to permit access for maintenance or cell removal. Each cell should be accessible for the
addition of water and for taking individual cell voltage and hydrometer readings.
Environment: Clean, cool and dry. A location should be selected which keeps water, oil and
dirt away from all cells.
Temperature: Recommended ambient temperature shall be between 50°F and 86°F (10 °C
to 30 °C). Elevated temperatures reduce operating life. Lower temperatures reduce battery
performance. Minimize temperature variations between the cells. To avoid temperature
variation between the cells, do NOT locate the battery near HVAC ducts or exhausts, heat
sources (i.e., equipment that generates heat) or direct sunlight.
Ventilation: Adequate ventilation must be provided, so as to prevent hydrogen gas from
exceeding explosive concentration. Ventilation must be adequate to ensure that pockets of
trapped hydrogen gas do not develop, particularly at the ceiling. Also refer to EN 50272-2 or
IEEE 484 for determining ventilation requirements.
Grounding: It is recommended that the racks be grounded. Also refer to national/local codes.
Codes: Refer to national/local building codes and fi re codes.
Floor: The fl oor of the battery room should be made of an acid-resistant material, such as
asphalt, ceramic plates or acid-resistant hard burnt bricks. The ceiling and walls of the battery
room should be painted with an acid-resistant paints.
•
•
•
•
•
•
•
•
•