Lucent Technologies Lineage
®
2000 ECS Battery Plant H569-403
Issue 4 February 1997
Engineering, Planning, and Ordering 3 - 15
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 that section 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
•
Cable and load breaker sizing
•
Low-voltage disconnect/reconnect
•
Controller options
•
Alarm system interface
Rectifier Sizing
The H569-403 Battery Plant uses the Lineage
®
2000 SR 100
ampere, +24 volt switched-mode rectifier. A maximum of six
rectifiers may be ordered per plant for a total of 600 amperes
maximum capacity.
In the absence of specific customer practices, the following
procedure is RECOMMENDED.
x. Determine the smallest whole number of rectifiers that
will provide the normal (List 1) plant drain in Table
3-A: ____
y. Determine the smallest whole number of rectifiers that
will provide the normal plus recharge current from
Table 3-A and (q): ____
z. Provide the GREATER of (s)+1 or (t) rectifiers: ____
For batteryless plants, skip to “Cable and Load Breaker Sizing.”