Lucent Technologies 1200A 24V ECS Battery Plant J85500E-2
Issue 7 October 1998
Product Description 2 - 5
RB voltage drops below a preset level, a comparator circuit on
the CP5 Fuse Board senses the low voltage condition and
removes power to the contactor. This opens the connection
between the battery buses and LVD bus, disconnecting the
batteries from the rectifiers and the load. The user has a choice
of disconnect threshold voltages (20.25 and 21.25 volts).
When the contactor is open and the rectifiers are not delivering
power, the controller is also unpowered. In this state, the
controller displays and LEDs are extinguished and various
alarms are issued to the alarm reporting center. (See the
Lineage
®
2000 Controller manual for further details.)
The red LVD OPEN and yellow LVD FAIL LEDs are located on
the front side of the dc distribution panel as shown in Figure 2-4.
The red LVD OPEN LED on the CP5 Fuse Board is lit whenever
the contactor is open, during a normal disconnect or in the
unlikely event of a contactor failure. The LVD sensing circuitry
on CP5 is redundant. A failure of either voltage detector circuit
lights the yellow LVD FAIL LED, but the contactor will stay
closed. A Fuse Alarm Minor (MNF) is issued when a LVD
circuit fails, lighting a yellow LED on the controller front panel
and sending Power Minor (PMN) alarms to the alarm reporting
center.
Once the contactor opens, it remains open until the RB voltage
again exceeds the set threshold voltage. Voltage does not return
until ac power is restored and the rectifiers restart. Once the
LVD circuit is energized, the LVD/R contactor closes the
circuit, allowing the batteries to be charged.
Distribution
Panels
The battery plant can be equipped with three distribution panels.
Two types of panel are available.
The first panel type accommodates seven slots. The following
options can be mounted on the panel:
•
KS23010 circuit breaker (takes up one slot)
•
KS22012 circuit breaker (takes up 1-1/2 slots)
•
Pre-charge capacitor (takes up five slots)
The bus bars in the panel are rated at 700 amperes in a 25°C
ambient temperature. Screws secure the circuit breakers to the
panel and patch cords wire the alarms. Front access panel design
allows easy circuit breaker installation.
