molded case circuit breakers - Eaton Canada

234
Originally a Westinghouse Product
DB switchgear with electromechanical trip
units was introduced around 1950. The
switchgear ratings were 15A-4000A with a
system voltage of 208V-600V.
During the late 1960s, Westinghouse
Electric introduced the DS circuit breaker
and switchgear. This switchgear assembly
was used for both industrial and commercial
applications. This switchgear assembly
also introduced the first solid-state trip
unit (Amptector) which eventually lead to
today’s standard of the Digitrip III RMS
Trip Unit.
Although the switchgear assembly itself
underwent a variety of changes and relocation
of manufacturing facilities, it has
proven to be a durable and long lasting
product. The DS switchgear ratings today
are 800A-5000A with a system voltage of
208V-600V.
Page Product 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 Present
235 DB Switchgear – East Pittsburgh
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SWITCHGEAR (LOW VOLTAGE)
Assemblies, Power Circuit Breakers
and Renewal Parts
PRODUCT DESCRIPTION
DSII
Switchgear with DS Air Circuit Breakers DS Switchgear with DS Air Circuit Breakers
PRODUCT HISTORY
PRODUCT HISTORY TIMELINE
DS Switchgear – East Pittsburgh (Vintage 1)
DS Switchgear – East Pittsburgh (Vintage 2)
WPA Switchgear – St. Louis
DS Switchgear – St. Louis (Vintage 3)
DS Switchgear – St. Louis (Vintage 4)
DS Switchgear – St. Louis (Vintage 5)
DSII Switchgear w/ DS Breaker – Asheville
DSII Switchgear w/ DSII Breaker – Asheville
Low voltage switchgear is designed to
protect power circuits so that the flow of
short circuit current can be safely and
quickly interrupted to isolate the fault,
while the other circuits remain in operation
and continue to supply the various
loads. Low voltage switchgear is built in
accordance with ANSI C37.20.1 for metal
enclosed drawout switchgear. The current
product offering uses the DSII/DSLII
air
circuit breakers.
March 2001