NewMar FDP 2020, Technical Practice, Page: 3 / 8

1
. GENERAL DESCRIPTION
1.1. The Newmar model FDP 2020 Fuse
Panels provide up to 40 circuits for the
distribution of DC power to equipment. Each
of the 40 circuits is individually protected by a
GMT style telecommunication fuse located on
the panel's faceplate. Alarm circuits are
provided to indicate and extend alarm
conditions when faults occur.
1.2. Input wiring is connected to a high
current, 2-hole lug input block located at the
rear of the panel. Each group of fuses or bus
has its own completely isolated inputs,
allowing the distribution of two battery voltages
through the same panel.
1.3. The power is distributed to the load side
equipment through GMT style fuses. There are
20 fuses per fuse group and two groups per
panel. Each fuse position is available for
installer connection at the rear of the panel. A
designation card is provided for keeping
records of which position is connected to
which equipment and what amperage of fuse
is to be used.
1.4. Alarm circuits are provided to alert service
personnel of fault conditions. A Fuse alarm is
caused when any of the GMT distribution
fuses opens. A red LED on the faceplate will
illuminate to signal a fuse alarm. These fuse
panels have two sets of common (C),
normally closed (NC), normally open (NO)
contacts for Fuse Alarms or battery or ground
activated external Alarms.
1.5. The FDP 2020 Fuse Panels are made
from 0.050" steel and painted black. Single
rack height panels are shipped with universal
brackets attached to panel which will fit both
19" and 23" wide racks and use only one 1.75"
panel space. A second loose set of mounting
brackets are provided which allow mounting
on 1” rack mounting hole centers (standard
brackets are 1_” centers.) The panel has a
clear L shaped lexan to protect the wiring
connections on the back of the panel.
2. APPLICATION
2.1. The N250140-N-L0522 / FDP 2020 Fuse
Panels are designed to be used in the
distribution of DC power. They are rack mount
panels that can provide fused DC power to up
to 40 individual circuits (20/20 GMT), or 20
pieces of equipment, providing redundant
battery feeds to each.
3. CIRCUIT DESCRIPTION
3.1. Power is connected to the fuse panel via
plastic input blocks located at the rear of the
panel, which are _” studs on 5/8” centers
(Torque 5.5 ft-lbs). These inputs are high
current stud blocks that supply current to the
fuse panel.
3.2. Distribution of current from each bus is
provided by GMT style fuses. Each bus has
20 fuse holders for distribution, fuses F1 to
F20 for each Bus A and Bus B. Each fuse
position is made available at the rear of the
fuse panels. Maximum output current of each
fused position is rated at 15 Amps, provided
the maximum bus current is not exceeded.
3.3. Fuse alarm circuitry provides 2 sets of dry
form “C” contacts. In the event of a fuse or
external alarm, both sets of normally open
contacts will close, providing a connection
between “NO” and “C” terminals on each set.
Note: Both sets of relay contacts operate
together in the event of a fuse alarm or an
external alarm.