Lucent Technologies Lineage
®
2000 ECS Battery Plant J85500D-3
3 - 14 Engineering, Planning and Ordering
Issue 5 January 1999
should be 150% of the List 2 current drain for the load that the
fuse is protecting.
Circuit breakers:
All circuit breakers supplied with the ECS power plant can be
loaded up to 100% of their rating only if the job engineer can
determine that the user load has no short term peaks greater than
150% of its rating and not exceeding 10 milliseconds in duration.
If the characteristics of the load cannot be determined, apply a
factor of 125% instead of 100%.
Lineage
®
2000
engineering
specifics
The methods used in the previous section, “General Engineering
Calculations”, are appropriate for the engineering of any battery
plant. The specifications documented in Section 3.1 are used in
this section to select the specific types and quantities of
equipment available with the Lineage
®
2000 ECS battery plant.
The following topics are covered in this section.
•
rectifier sizing
•
battery sizing
•
number of bays
•
cable and load breaker sizing
•
low-voltage disconnect/reconnect
•
low-voltage load disconnect/reconnect
•
thermal (slope/step) compensation feature
•
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 6. 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): ____
