Lucent Technologies ECS Minicell Battery Plant H569-420
Issue 5 February 1997
Product Description 2 - 9
datalogger board may be used in conjunction with the
microcomputer option to provide general purpose ac and dc
voltage and current monitoring and control. (See the ECS
controller manual for further information.)
DC Distribution
The ECS dc distribution panel (H569-420 Group 7 or 8) has a
maximum of 42 circuit breaker positions. The circuit breakers
are a plug-in style, available in 3 to 100 ampere ratings (see
Figure 2-4). The circuit breakers rated between 3 and 50 amperes
occupy one position; those rated between 60 and 100 amperes
require two positions on the panel. Each bus bar in the panel is
rated at 200 amperes in a 50° C ambient temperature, but the
total amperage for the panel cannot exceed 600 amperes. If a
panel is expected to operate continuously in an ambient
temperature of 40°C to 50°C, the total current draw through
the panel cannot exceed 500 amperes. The distribution panel
contains the plant charge and discharge bus bars, plant shunt,
optional low voltage disconnect/reconnect (LVD/R) contactor
and associated circuitry (see Figure 2-3).
ECS DC
Distribution
Panel
The ECS dc distribution elements are shown schematically in
Figure 2-2 and pictorially in Figure 2-3. They are located behind
the dc distribution cover panel. These elements include the
distribution bus bars, the plant shunt and the optional low
voltage battery disconnect/reconnect feature.
Distribution Bus
Bars
The distribution or plant bus bars include the Charge Return Bus
and the Discharge Return Bus (see Figure 2-3). Battery strings
are terminated to Battery Bus 1 and the Charge Return Bus.
Rectifier output is terminated to Battery Bus 2 and the Charge
Return Bus. Power conductors for load circuits are connected,
though distribution circuit breakers, to Battery Bus 2. The return
conductors for load circuits tie to the Discharge Return Bus. The
Discharge and Charge Return Buses are joined via the Plant
Shunt. Battery Buses 1 and 2 are interconnected by the LVD/R
Contactor.
Plant Shunt
The current shunt in the ECS Battery Plant is connected between
the Charge Return Bus and the Discharge Return Bus (see Figure
2-3). It is used to measure the total current supplied to the load
from the rectifiers and/or batteries. The shunt has a full scale
rating of 50 millivolts at the maximum plant current of 600
