Lucent Technologies Lineage
®
2000 ECS/GPS Battery Plant J85500G-2
3 - 14 Engineering, Planning and Ordering
Issue 6 May 1999
Lineage
®
2000
Engineering
Specifics
The methods used in the previous section, “General Engineering
Calculations”, are appropriate for the engineering of any battery
plant. The same methods are used in this section to select the
specific types and quantities of equipment available with
Lineage
®
2000 ECS battery plants, including the J85500G-2.
The following topics are covered in this section.
•
rectifier sizing
•
battery sizing
•
number of bays
•
cable and load breaker sizing
•
low-voltage disconnect/reconnect
•
emergency shutdown/disconnect
•
controller options
•
alarm system interface
•
earthquake bracing
Rectifier Sizing
The Lineage
®
2000 SR 50 ampere, -48 volt switched-mode
rectifier is currently available with the Lineage
®
2000 ECS
Battery Plant J85500D-3. The maximum number of rectifiers
per plant is 12. In the absence of specific customer practices, the
following procedure is RECOMMENDED.
24. Determine the smallest whole number of rectifiers that will
provide the normal (List 1) plant drain in Table 3-A: ____
25. Determine the smallest whole number of rectifiers that will
provide the normal plus recharge current from Table 3-A
and step (17): ____
26. Provide the GREATER of step (24) +1 or step (25)
rectifiers: ____
Some ECS battery plants include batteries in the same bay as the
rectifiers and controller. Others, like the J85500G-2, locate the
batteries elsewhere. For batteryless plants, skip to Initial and
supplementary bays, below.
Battery Sizing
Many vendors offer families of batteries that cover a wide range
of ampere-hour capacities. Ampere-hour capacities of parallel
