GE Industrial Solutions Micro-BDCBB - Manual (Page 37)

J85568E-1 Secondary DC Mini-Distribution Bay
Issue 6 January 2008 Installation 5 - 9
Meter and
Alarm
Termination
Panel
The top panel on the Mini-Distribution Bay is a meter and alarm
termination panel. It consists of a digital meter and A/B switch
wired to the current monitoring shunts of each load and an alarm
termination circuit board. The purpose of the alarm termination
board is to provide an easy access point for the installer to
connect alarm monitoring equipment to the Mini-Distribution
Bay. The alarm termination board is shown in Figure 5-6. It
contains four 12-position screw type terminal blocks for
monitoring the four sets of Form-C contacts of each fuse or
circuit breaker panel (three for fuse or circuit breaker failure and
one for power loss). Each fuse or circuit breaker panel may be
monitored individually by connecting alarms to each of the four
terminal blocks. The left terminal block is connected to fuse or
circuit breaker panel #1, the next to fuse or circuit breaker panel
#2, the third to fuse or circuit breaker panel #3, and the right
terminal block to fuse or circuit breaker panel #4. Alarm wiring
is connected to the terminal block by simply stripping the wire,
placing the wire in the terminal, and tightening the screw. The
recommended wire size is 22-26 gauge.
There are twelve DIP switches between each terminal block.
Each DIP switch is associated with a terminal block position and
is factory set to the open position. If a frame alarm is needed,
simply close the DIP switches associated with that alarm. See
Table 5-A. Alarm monitoring equipment requires either a
closure on alarm or an open on alarm. When a frame alarm is
needed as one of the alarms, simply close the DIP switch settings
according to Table 5-A. Alarm wiring is connected at P201
terminal block (C contact) and P204 terminal block (NO or NC
contact). For example, if a frame fuse or circuit breaker alarm
(visual) is required with closure on alarm, close positions 1 and
3 on switches SW2, SW4, and SW6. Then connect a pair of
alarm wires to P201
pin 7 (C) and to P204 pin 9 (NO). It may be desirable to monitor
for power loss to load A or B. Connect alarm wiring to pins 1 and
either 2 or 3 (as required) of terminal block P201 or P202 to
monitor load A. Connect a second pair of wires to either terminal
block P203 or P204 to monitor load B. For a frame power loss
alarm, set DIP switches and connect alarm wires as shown in
Table 5-A.
A label depicting the equipment layout, terminal lug options,
and alarm termination board designations is located on the clear
cover on the back of the unit to assist installation personnel. See
Figure 5-7.