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Table 2 - DSL Breakers - Current Limiting Type Breakers and Combinations
Type OSL-206
Frame Size, Amperes
800
Max. Interrupting Rating,
RMS Symm. Amp., System
Voltage 600 or Below 200,000
Notes: DSL-206 and DSL-416 include limiters integral
with drawout breaker elements. DSL-632 includes
DS-632 breaker and DS-3200 drawout fuse truck, in
separate interlocked compartments. Maximum con-
tinuous rating limited to 3000A when fuse compart-
ment is above breaker compartment in same unit.
DSL-840 includes DS-840 breaker and DS-4000 draw-
out fuse truck,
in
separate interlocked compart-
ments. Maximum interrupting rating limited to
150,000 amperes when 6000A fuses are used.
GENERAL DESCRIPTION
Cutler-Hammer
OS
and OSL Circuit Breakers are hori-
zontal drawout magnetic air circuit breakers. They are
designed for use in Metal-Clad Switchgear assemblies
having maximum voltages of 635 volts AC for
OS
Circuit
Breakers and 600 volts for OSL. They are equipped with
spring-stored, energy-closing mechanisms. All primary
insulation to ground is glass polyester. These breakers
have many common features, but they will vary in size
and detail depending on the specific breaker type number
and ratings. Figure 1 shows Type
OS
Low Voltage Power
Circuit Breaker shipped inside its own compartment. Fig-
ures 78 and 79 show Types OSL-206 and OSL-416 Cir-
cuit Breakers.
Each
OS
and OSL Circuit Breaker consists of a basic
breaker assembly, three interrupter assemblies (arc
chutes), barriers, and an Amptector solid-state trip unit.
OSL breakers have added current limiters to extend their
interrupting range to 200,000 amps. Various accessories
are also provided.
Basic Breaker Assembly
The basic breaker assembly includes a chassis, a control
panel, an operating mechanism, a levering-in device, var-
ious interlocks, and three insulated pole unit assemblies
mounted on a base.
OSL-416
OSL-632 OSL-840
1600
3200 4000
200,000 200,000
200,000
On the front of the breaker are the control items needed
for proper operation of the circuit breaker. They are:
breaker position indicator, breaker open/closed indicator,
levering device shutter and shaft, breaker trip plate, clos-
ing spring charged/discharged indicator, Amptector trip
test terminal access, Amptector trip controls, closing
spring charge handle, close
bar
and padlock plate.
Arc Chutes
Each arc chute contains vertical steel splitter plates, insu-
lating spacers and plates. These are all assembled in an
insulating arc chute jacket. The arc chutes mount on top
of the pole units and are vented to atmosphere.
Optional Components
Optional components provided upon order are: under-
voltage trip attachment, overcurrent trip switch, high-load
trip switch, latch check switch, auxiliary switches.
Accessories
Levering crank and Amptector Test Kit are supplied
as
required.
Since the major components and the accessories
depend on the particular type and rating of circuit
breaker, packing lists provided with each shipment and
more detailed sections of this instruction book should be
referred to for special information. Any questions about
the circuit breakers may be referred to the nearest Cutler-
Hammer Sales Office. When making inquiries about type
OS
(OSL) circuit breakers always provide the specific
type number, continuous current rating, mechanism type,
applicable order numbers, breaker shop orders
or
style
numbers, date of manufacture and other pertinent infor-
mation as shown on the circuit breaker nameplate. Inquir-
ies can be handled faster when complete information is
provided with the initial inquiry.
Effective
October
1998
Courtesy of NationalSwitchgear.com
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