3WL Air Circuit Breakers
3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)
General data
8
Siemens · 2009
■
Design
Overview of SENTRON 3WL circuit breakers/
non-automatic air circuit breakers
Versions
• Rated currents: 630 A to 6300 A
• 3 sizes for different rated current ranges (see illustration
"Overview of SENTRON 3WL Circuit Breakers/Non-Automatic
Circuit Breakers")
• 3- and 4-pole versions
• Rated operational voltage up to 690 V AC and 1000 V DC.
Special versions up to 1000 V AC and 1150 V AC available
• 4 different switching capacity classes in the range from 55 kA
to 150 kA for AC applications and one switching capacity
class for DC applications.
The SENTRON 3WL circuit breakers are supplied complete with
operating mechanism (manual operating mechanism with me-
chanical closing), solid-state release and auxiliary switches
(2 NO contacts + 2 NC contacts in the standard version), and
can be equipped with auxiliary releases.
Installation types
Fixed-mounted or withdrawable version
Ambient temperatures
The SENTRON 3WL circuit breakers are climate-proof according
to IEC 60068-2-30. They are intended for use in enclosed areas
where no severe operating conditions (e. g. dust, corrosive va-
pors, damaging gases) are present.
When installed in dusty and damp areas, suitable enclosures
must be provided.
Coordinated dimensions
The dimensions of SENTRON 3WL circuit breakers only differ in
terms of the width of the device which depends on the number
of poles and the size.
Due to the nature of the design, the dimensions of devices with
a withdrawable version are determined by the dimensions of the
guide frames, which are slightly larger.
Non-automatic air circuit breakers
A special version of circuit breaker is utilized as a non-automatic
air circuit breaker. The non-automatic air circuit breakers are de-
signed without an solid-state release system and do not perform
any protection duties for the system.
One potential application is the use as a bus coupler in systems
with parallel feed-ins.
The versions and features can be selected according to those of
the circuit breakers.
Operating mechanisms
The circuit breakers are available with various optional operating
mechanisms:
• Manual operating mechanism with mechanical closing (stan-
dard design)
• Manual operating mechanism with mechanical and electrical
closing
• Motorized operating mechanism with mechanical and electri-
cal closing
The operating mechanisms with electrical closing can be used
for synchronization tasks.
NSE0_00887 o
HS
100
80
66
460 / 590 460 / 590
291 / 291 385 / 385
434 / 434 460 / 460
320 / 410 320 / 410
291 / 291 385 / 385
434 / 434 460 / 460
H
100
C
150 (3p)
130 (4p)
704 / 914 704 / 914
291 / 291 385 / 385
434 / 434 460 / 460
SN
66
55
800
1000
1250
1600
630
800
1000
1250
1600
2000
2500
3200
4000
4000
5000
6300
N
30
DC
The dimension for the depth of the circuit breaker is from the circuit breaker rear to the inner surface of the closed switchgear door.
Circuit breaker
Breaking capacity
Dimensions
Fixed-mounted,
With-
drawable
3- /4-pole
3- /4-pole
Width
Depth
Height
Width
Depth
Height
Width
Depth
Height
Size IIISize I Size II
at 500 V AC (kA) or
cu
rated current
(A)
n max
at 300 V DC (kA)
cc
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