3WL Air Circuit Breakers
3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)
Project planning aids
50
Siemens · 2012
Example of an overall circuit diagram for 3WL circuit breaker
(3WL1. ..–.....–4GN4–Z C11+ C22 + K07)
Manual/motorized operating mechanism with stored-energy fea-
ture with electrical ON button (option C11), with ready-to-close
signaling switch (optionC22), with LSING release, with "UVR" un-
dervoltage release (F3), with "ST" shunt release (F1), with tripped
signaling switch (option K07), with auxiliary switch 4 NO + 4 NC.
Function diagram of
3WL circuit breaker
-A1 ETU release
-S1/-S2 1st auxiliary switch block (2 NO + 2 NC)
-S3/-S4 2nd auxiliary switch block (2 NO + 2 NC)
-S7 (optional) 2nd auxiliary switch block, S7 (2 NO) can be used
if there is no S3 - S3 and S7 have
the same terminal assignment/mounting space
-S8 (optional) 2nd auxiliary switch block, S8 (2 NO) can be used
if there is no S4 - S4 and S8 have
the same terminal assignment/mounting space
3WL1. ..-.....-...2 (2 NO + 2 NC) S1+S2
3WL1. ..-.....-...4 (4 NO + 4 NC) S1+S2+S3+S4
3WL1. ..-.....-...7 (6 NO+ 2 NC) S1+S2+S7+S8
3WL1. ..-.....-...8 (5 NO + 3 NC) S1+S2+S3+S8
-S10 Electrical ON button
-S11 Internal motor shutdown switch (if spring is tensioned)
-S12 Motor shutdown switch
(no automatic tensioning of spring)
-S20 Ready-to-close signaling switch
-S24 Tripped signaling switch
-F1 1st auxiliary release shunt release
-F3 2nd auxiliary release undervoltage release
-F5 Tripping solenoid
-M Motor for "charging store"
-P Stored-energy mechanism
-QS Actuator lever for "stored-energy feature"
-Q1 Main contacts
-T1/-T2/-T3 Current transformers
-X5/-X6/-X7/-X8 Terminals
-Y1 Closing solenoid
-R Indicator and reset button for release
-X8.9/-X8.10 Connection option: external neutral conductor trans-
former
M
R
-S4
-S3
-S2
-S1
-Q1
L1
(L+)
-X7.9
-X6.7
-X6.14
-X5.12
-X5.2
-X6.6
-X7.12
-X7.14
QS
P
N
(L-)
-S11
-Y1
-F1
-F3
-T3
-T1
-T2
1
3
5
-X6.12
-X6.10
-X6.4
-X6.2
-X5.10
-X5.8
-X5.6
-X5.4
2
4
6
-X6.11
-X6.9
-X6.3
-X6.1
-X5.9
-X5.7
-X5.5
-X5.3
-X8.9
-X8.10
*
N
(L-)
ETU
L
S
I
G
N
N
-A1
-F5
-S24
-S20
-X6.5
-X7.13
-X5.11
-X6.13
-X6.8
-X5.1
NSE0_01558b
L1
(L+)
mech.
mech.
-S10
U<
-S12
version
OFF
ON
ON
* Short terminals, if no N sensor
ON
OFF
electr.
release
contact
NSE0_01559c
M1
P
1
S20
F1
F2
F3
F4
Y1
Q1
S1 & S2
S3 & S4
F5
T1
T2
T3
T4
2
3
S24
A1
L
S
I
G
N
N
© Siemens AG 2011
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