GE Industrial Solutions Micro-BDCBB - Manual (Page 34)

J85568E-1 Secondary DC Mini-Distribution Bay
5 - 6 Installation Issue 6 January 2008
Frame Ground
The frame ground connection is located on the top rear crossbar.
Connection is made using a 1/4-inch double hole terminal lug on
0.625-inch centers. Refer again to Table 3-C for recommended
terminal lugs for the frame ground connection. Hardware for
connecting frame ground is furnished with the Mini-Distribution
Bay.
Fuse or Circuit
Breaker Panel
The List C fuse panel is shown in Figure 5-4A. Each panel is
equipped with twelve fuse blocks for 3-60A fuses and an alarm
circuit module. Fuse sizes and ordering comcodes are listed on a
label on the front of the Mini-Distribution Bay. See Figure 5-5.
Recommended alarm fuses are GMT .18A, comcode
402328926. The fuse block is UL listed and uses the WP-92461
List 100-110 series of fuses. These fuses offer a big advantage
over other fuse types in that they are UL recognized to UL
standard 198L “DC INDUSTRIAL FUSES” with a 170 Vdc,
100,000-ampere interrupt rating. These fuses also have color
bands to indicate the amperage rating of the fuse.
The List D circuit breaker panel is shown in Figure 5-4B. Each
circuit breaker panel has 12 circuit breaker positions and an
alarm circuit module. Circuit breaker sizes and ordering
comcodes are listed on a label on the front of the
Mini-Distribution Bay. See Figure 5-5. The circuit breakers are
sized from 3 to 100 amperes. They are UL listed. The circuit
breakers are rated at 80Vdc with a 10,000A interrupt capacity.
There are labels on the front of the fuse or circuit breaker panel
for stamping the type of equipment being powered and the fuse
or circuit breaker size required. Distribution cabling is
terminated to each fuse block or circuit breaker on a 1/4-inch
stud. Table 3-D lists the recommended terminal lugs for fuse
blocks. Table 3-E lists the recommended terminal lugs for circuit
breakers. Hardware for connecting these lugs is furnished with
the Mini-Distribution Bay. The recommended torque value is 75
inch/lbs.
The alarm circuit module, BEP1, consists of two circuits, one for
monitoring power loss to the fuse or circuit breaker panel and the
other monitoring for fuse or circuit breaker failures. Alarms are
indicated by LEDs on the panel and by Form-C contact closures.
A green LED illuminates to indicate power is present on the
panel. If power is lost, the green LED extinguishes and a set of
Form-C contacts operates. When a fuse or circuit breaker
operates, a red LED illuminates on the panel and three sets of