Powell LVSWGR-AR, Manual

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6 Equipment Description
Low Voltage Arc Resistant Switchgear (LVSWGR-AR ® )
Equipped with Magnum DS Circuit Breakers
01.4IB.26263B
Ch 3 Equipment Description
A. G
enerAl
Powell is committed to continuous product
improvement. It is possible that improvements
occurred between revisions to this document
and therefore, may not be described in these
instructions. If the equipment does not
resemble the photographs and descriptions
contained herein, do not attempt to perform
the actions. Contact the Powell Service
Division.
NOTICE
Powell Low Voltage Arc Resistant
Metal-Enclosed Switchgear described in
this bulletin is designed to comply with IEEE
Standard C37.20.1 (Standard for
Metal-Enclosed Low Voltage Power Circuit
Breaker Switchgear) and IEEE C37.20.7 (Guide
for Testing Metal-Enclosed Switchgear for
Internal Arcing Faults). The metal-enclosed
switchgear is a lineup of one or more
switchgear vertical sections, which are
enclosed on all sides, top, and bottom except
for the ventilation openings, lower unit
cable penetrations, and view windows. The
switchgear sections consist of full depth
structural frames and components providing
separate compartments for circuit breakers,
buses, cable and auxiliary components. The
section main bus and intersection bus is
isolated from the cable compartments.
Powell low voltage, arc resistant switchgear for
Magnum DS LVPCB circuit breakers consists of
multiple sections, fastened together as a single
group (Figure 1). It is completely operational
when installed and connected directly to
the customers’ power supply. Circuit breaker
compartments (Figure 2, g) are provided with
hinged access doors for installing or removing
the circuit breakers. Auxiliary compartments
(Figure 2, d) are provided with hinged access
doors for mounting and maintenance of
instruments, relays, and wiring. An overhead
breaker lifting device (Figure 2, a) is provided as
an option.
Powell low voltage, arc resistant switchgear
assemblies for Magnum DS LVPCB are
complex, high-current electrical equipment
designed to operate within the voltage and
current limitations shown on the equipment
nameplate. Do not apply this equipment to
systems with voltages and/or currents in excess
of these limits.
The equipment has been designed to operate
within the customers’ specifications with
regard to circuit capacity.