Lucent Technologies 1200A 24V ECS Battery Plant J85500E-2
3 - 16 Engineering, Planning, and Ordering
Issue 7 October 1998
Anticipated Growth. The growth pattern for the battery plant
may dictate the battery size. It is usually easier to engineer and
install additional strings of the same battery type and capacity as
those already in place. The growth in battery capacity is directly
related to the growth in rectifier capacity, since both must
increase with increasing load current. Since only a fraction of
added rectifier capacity is needed for recharging added batteries,
the matching incremental change in battery capacity depends on
the desired recharge factor. (See paragraph “Charge Capacity
and Recharge Time” for an explanation of charge capacity and
recharge factor.)
Since the charge capacity of the Lineage
®
2000 ECS battery
plant grows in 100 ampere increments with the SR100A/24V
rectifier, the optimum battery capacity increment may be
approximated as follows.
A-hr increment = (100 A) x (reserve time in hours)/
(minimum recharge factor)
System Reliability. In most battery plants, it is possible have an
open circuit in the battery subsystem that could remain
undetected until ac power is lost and battery power is required.
Therefore, it is a good practice to select battery size such that at
least two strings are required for applications where service
reliability is critical. Multiple strings allow for easier
maintenance on the battery system without jeopardizing service
to the load equipment.
Initial and
Supplementary
Bays
All subsystems of the ECS battery plant, excluding batteries, can
occupy the entire framework called the Initial Bay. The ultimate
capacity of the battery plant (12 rectifiers and 63 circuit
breakers) will fit in this space. For batteryless plants, the initial
bay is the only necessary assembly.
Batteries must be engineered per the manufacturer's instructions.
Shelf-mounted batteries, offered by some suppliers, may be
integrated into a frame line-up with the ECS battery plant. Most
other vendor's batteries, however, are designed for mounting on
stands that require special floor plan arrangements.
Specify the number of Supplementary Bays required: ____