Siemens SENTRON 3WL10 Series Manual page 29

3WL10 switch disconnector
Switch disconnectors are devices that meet the insulation requirements of the standard
IEC 60947-3.
The switch disconnector has an identical design to the circuit breaker and has the same
dimensions, weights, and optional accessories. However, it differs from the circuit breaker in
that it does not have any protection functions and therefore no electronic trip unit (ETU) and
no internal electronics or current transformer.
The disconnector ensures an insulation clearance between its main contacts in the open
state that isolates all downstream parts of the installation.
If used with an external protection relay with a maximum delay time of 500 ms, the switch
disconnector has a breaking capacity at the maximum rated operational voltage (U
corresponds to the value of the one-second rated short-time current (I
air circuit breaker is sometimes also called a load interrupter switch because it can switch
overcurrents.
3WL10 non-automatic air circuit breakers are only available in classes N and S.
Number of poles
Rated operational voltage
Rated insulation voltage
Rated impulse withstand
voltage
Isolating features
Current-carrying capacity of
the neutral pole for 4-pole
non-automatic circuit breakers
Breaking capacity
Rated uninterrupted current
(at 40 °C)
Rated short-circuit making
capacity
Rated short-time withstand
current
Utilization category
(according to IEC 60947-3)
Rated conditional short-circuit
current up to 690 V
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01
U AC (50/60 Hz)
e
U AC (50/60 Hz)
i
U
imp
I AC (50/60 Hz)
u
I AC (50/60 Hz)
u
I AC (50/60 Hz)
u
I AC (50/60 Hz)
u
I 400 - 415 V AC
cm
I 440 V AC
cm
I 50 - 5250 V AC
cm
I 690 V AC
cm
I 1 s
cw
I 3 s
cw
I
cc
Description
2.3 Basic unit
) that
e
). The non-automatic
cw
3, 4
V 690
V 1000
kV 12
IEC 60947-3
% I 100
n
N
A 630 630
A 800 800
A 1000 1000
A 1250 1250
kA 88 105
kA 88 105
kA 88 105
kA 88 105
kA 42 50
kA 24 36
AC-23A AC-23A
kA 42 50
S
27