molded case circuit breakers - Eaton Canada

244
SWITCHGEAR (LOW VOLTAGE)
DSII Assemblies, Power Circuit Breakers
and Renewal Parts
PRODUCT DESCRIPTION
DSII Switchgear Assembly
Typical Asheville Design, 1993
REPLACEMENT CAPABILITIES
Cutler-Hammer offers an extensive amount
of products to support DSII switchgear:
New DSII Air Circuit Breakers
New DSII circuit breakers are available for
replacement or to fill existing vacant cells.
All breakers are newly manufactured and
are mechanically and electrically the same
as the breakers originally specified and
supplied.
DSII Circuit Breaker Provisions
Breaker provisions are required in switchgear
when there is an existing space in a
structure that is to be filled with a breaker.
Provisions are available for all ratings and
TECHNOLOGY UPGRADES
PowerNet Monitoring and Control System
IQ and PowerNet Communications Retrofits
Cutler-Hammer offers IQ products to replace
existing analog meters, instruments, and
protective relays with microprocessor-
based solid-state true-RMS sensing devices.
Westinghouse DSII switchgear with type
DS (non-limiting) and type DSL (with limiters)
low voltage air power circuit breakers
was introduced in 1993. The DSII and DSLII
circuit breakers were incorporated in the
DSII switchgear assembly in 1996. The design
of the new DSII switchgear was not
undertaken without the valued input of our
customers. To determine what needed to
be improved, changed and added, a survey
of many of our customers was made. The
results of this input centered around quality,
cycle time reduction during both production
and maintenance, standardization
of wiring, placement of repetitive devices
and ease of maintenance.
DSII switchgear is constructed in accordance
with ANSI C37.20.1, C37.51, NEMA
SG3 and SG5, and UL Standards 1558 for
low voltage, metal-enclosed drawout
switchgear. As such, it contains low voltage
power circuit breakers, type DS/DSL or
DSII/DSLII as the principal overcurrent
protective devices both as main and as
feeder protection. The enhanced structure
features of DSII switchgear allows the
include all parts required to complete the
cell in accordance with the switchgear as
originally supplied.
Factory Modification and Repair
Factory modifications and repairs are
available for new or customer owned DSII
circuit breakers. This UL approved service
includes trip unit replacements, conversion
from manually operated to electrically
operated, breaker calibrations, and the
addition of numerous accessories for the
DSII and DSLII circuit breaker.
IQ products can be furnished as components
for field installation on the switchgear
or can be provided as new replacement
front panels. The new replacement door
panels available for DS switchgear assemblies
include the IQ devices mounted and
wired. The instrument compartment door
will fit all vintages of DS switchgear from
1968 to the present. Door panels can be
supplied with analog instruments, breaker
control devices, or any other device that
will physically fit. The IQ products can be
matched in numerous combinations to
include the IQ Analyzer, IQ Data PlusII, IQ
Data, IQ Generator, IQ Data Plus 4000/4100,
and the Assemblies Electronic Monitor
(AEMII). Communications can then be tied
to the Cutler-Hammer PowerNet System.
breakers to be positioned in the ”connected,“
”test,“ ”disconnected,“ or ”remove“
position with the breaker compartment
door closed. This eliminates the danger of
exposed live circuits or protruding breakers
commonly associated with ”through the
door drawout“ construction.
Compartmentalization of the drawout
breakers is part of the standard construction.
DS/ DSL or DSII/DSLII circuit breakers
are designed to ANSI standards
C37.13, C37.16 and C37.17 in frame sizes
ranging from 800A to 5000A.
Ratings
DSII Switchgear Bus 800 – 6000A
DSII/DSLII Breaker 15 – 5000A
Voltage 208 – 600V
Interrupting Capacity 30 – 200kA
Chronology
There have been five vintages of DS
switchgear since the original design was
manufactured in 1969. Today, many capabilities
still exist to support the different
vintages of DS switchgear.
DSII Breaker Parts
An extensive inventory of newly manufactured
renewal parts for DSII and DSLII
circuit breakers are available.
DSII Switchgear Structure Parts
DSII switchgear parts are available for
most DS designs. Newly manufactured
replacement parts (such as doors, breaker
provisions, lift trucks, metering, etc.) are
available.
DSII Circuit Breaker with Digitrip RMS Trip Unit
Family (T510, T610, T810, T910)
Digitrip Trip Unit Retrofit Kits
Trip unit retrofit kits are available for all DB
breaker frames. Refer to pages 256-257 of
this publication.
March 2001