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4
4.4.
Remove the distribution fuse feeding the
input cables that are to be connected to the new
panel. Attach the input cables to the input
terminal block in accordance to the National
Electrical Code, ANSI/NFPA, and Canadian
Electrical code. Hook up the input cables to the
input terminal block on the fuse panel (“BAT” &
“RTN” for each bus). Each high current input
terminal uses a two-
hole compression lug (1/4” on
5/8”, torque to 5.5 ft-lbs). A two-hole lug must be
used for proper operation (see fig 4.4.1)
Note:
The supply source must be limited to an
instantaneous short-circuit current not to exceed
450 Amps.
9
9
BAT
B
RTN
Figure 4.4.1
4.5.
The fused battery outputs (BAT) and
ground returns (RTN) are also located on the
back of the panel. Each fuse holder and
terminal position is individually numbered.
Connect your load side equipment to the fuse
panel,
and
record
which
equipment
is
connected to which input on the designation
card (supplied).
4.6.
All battery return (“RTN”) connections are
also terminated on barrier strips (#6 screw, up to
10awg fork). Note, these returns are isolated from
the chassis frame.
4.7.
This panel has Bus A, and Bus B alarm
contacts. Each alarm has a common (C),
normally open (NO) and normally closed (NC)
alarm contact.
In an alarm the “C” contact will
short to the “NO” contact, and the “NC” will open.
Wire-wrap the alarm connections as per your
alarm system requirements. We recommend you
fuse the alarm battery supply (ABS) to 1A or less
to protect the alarm wiring and circuitry.
4.8.
Chassis Ground; For safety reasons, and
as recommended by NEBS, the chassis should be
electrically connected to the rack ground. From
step 4.3. the panel should already be ground to
the rack via the #12-24 thread forming rack
screws and outside tooth lock washers. In
addition to grounding via the mounting brackets, it
is recommended you ground the chassis using a
ground cable and the
two ¼” bolts and locks on
back of chassis (
1/4” bolt torque; 5.5ft-lbs or
7.5Nm). Consult the National Electric Code,
ANSI/NFPA, and Canadian Electrical code for
AWG sizes.
4.9.
The input wiring feeding this panel should
be protected by a Listed fuse/breaker rated for at
least 60Vdc, with a trip rating of 150 Amps Max.
With input wiring connected and this input fuse
installed, the panel should power up with the
Normal Operation LED
illuminated and without
any red LEDs
!
illuminated, and the relays
should be in the “Normal” state (“C” connected to
“NC”).
4.10. If you wish to verify the fuse alarm circuit,
you can insert a blown fuse into one of the empty
fuse
holders.
The
red
Fuse
Alarm
LED
!
should light and the Normal Operation
LED
should extinguish and the appropriate
alarm extension relay should change states to
extend the alarm.
4.10. Install panel output distribution fuses as
required. Be sure to size fuses to no more than
70% of their rating (14A max for a 20A fuse).
Fuses are not included with this panel. Fuse
ratings should be selected to match the load
equipment ratings. Once the appropriate fuses
have been selected, the fuse information for F1-
F9 on BUS A and F1-F9 on BUS B is to be
recorded at the time of installation. Use the
provided designation card to keep a record of
which equipment is connected to which circuit
and what the fuse rating is. Be careful not to
overload the panel bus or BDFB fuse position
rating supplying the panel.
4.12 Install amperage marking labels as required
below each fuse for identification of circuit rating.
For fuse color codes please see table 4.12.1
below.
