3
15272 Newsboy Circle
Huntington Beach
California 92649
Phone: 714-751-0488
Fax: 714-856-9679
E-Mail: [email protected]
PoweringTheNetwork.com
IV) PANEL INSTALLATION
A) Panel Mounting
Two sets of mounting brackets are provided (select pair required for
either 19" or 23" rack), and six 6-32 x 5/16" pan head phillips screws
with six # 6 lock washers are provided for attaching the brackets to
the assembly. Two sets of tapped attachment holes in the assembly
sides facilitate either flush or 6" forward mounting.
B) Input Wiring
Note:
Model DST-10 has only a single 450 amp bus (BUS A). All
references in this manual to dual bus applications apply to model
DST-20A only.
Hot input is wired to the heavy duty input bus bar(s) at the rear
panel. These are the vertically oriented bus bars on either side
labeled “BUS A” and “BUS B”. The DST may be used with either
positive or negative ground applications. Each bus is rated at
450 amps and in model DST-20A, they are electrically isolated,
permitting redundant power, dual voltage and/or dual ground
reference configurations in the same unit. (The dual buses of model
DST-20A may also be paralleled to make a single 900 amp bus;
refer to the OPTIONS section of this manual.)
Wiring should be terminated with ring lugs to ensure a safe
installation. Two holes are provided to accommodate double hole
lugs. Both holes will accept either 1/4" or 5/16" hardware and the
rear hole is elongated to enable adjustment for center-to-center
hole spacing between 3/4" and 1". Use the 1/4" - 20 x 1" hex head
bolts, and 1/4" lock washers, flat washers and hex nuts which have
been provided for securing the lugs, or obtain and install 5/16"
hardware. (Note: The input bus bars are isolated from the case with
a nylon spacer which allows a certain degree of "play". If a small
amount of bus bar shifting is noted when wiring, this is normal.)
Recommended torque for all 1/4 inch hardware is 50 inch-pounds.
C) Output/Load Wiring
(Refer to N.E.C. or local codes for any questions regarding proper
d.c. wire gauges and color codes.)
Twenty output bus bars are provided with model DST-20A; ten are
provided with model DST-10. Use of any of the outputs requires
installation of a plug-in breaker at that position. Outputs 1-10 are
fed by BUS A only; outputs 11-20 are fed by BUS B only (unless
buses are paralleled).
Wires are attached to the numbered output bus bars using the
provided 1/4 - 20 x 3/4" hex head bolts and 1/4" lock washers.
Center-to-center spacing for double hole lugs is 5/8".
V) CIRCUIT BREAKER AND SUMMARY ALARM
INSTALLATION
A) Breaker Installation
The DST accepts only specially designed plug-in “mid-trip” circuit
breakers with auxiliary contacts which are available from
NEWMAR. (The mid-trip function is explained later). Refer to the
Circuit Breaker Ordering Guide at the end of this manual for
available values.
Note:
It is recommended that only breakers obtained from
NEWMAR should be used with this panel to assure proper fit and
operation. When selecting the breaker use the following guideline:
Where loads will be in continuous operation for three hours or
more, then the breaker value should be at least 120% of normal
load current.
1) Remove the front panel of the assembly (held in place with four
flat-head phillips screws).
2) Install each circuit breaker by lining up the push-in studs of
the breakers with the internal mating sockets and pushing firmly
into place. When pressed into place, the two top auxiliary contact
terminals in the middle of the breaker will press against the mating
clips. (The bottom auxiliary contact is unused in this installation.)
3) Align the front panel into position over the breakers and onto
the assembly. Knock out any plastic open position covers, as
necessary. It may be necessary to nudge breakers individually up
or down to achieve proper alignment.
4) Replace the front panel mounting screws.
5) Re-install plastic covers over any unused breaker positions.
6) Remove the plastic film from the clear protective breaker toggle
guard and install as shown in FIGURE 1. Apply the provided labels
to the guard for circuit identification, if desired.
FIGURE 1: Toggle Guard Installation
Front Panel
Protective Toggle Cover
Note:
100 and 75 amp breakers may
not be installed side by side. There
must be an open space or a breaker
rated at 50 amps or
less between them.
Toggle Guard Mounting Screw
Flat Washer
Lock Washer
Nylon Stand-Off