3WL Air Circuit Breakers
3WL Non-Automatic Air Circuit Breakers up to 4000 A (DC)
General data
52
Siemens · 2009
■
Technical specifications
1) Make-time through activation solenoid for synchronization purposes
(short-time excited) 50 ms.
2) Maintenance means: replace main contact elements and arc chutes (see
Operating Manual).
3) Further technical specifications on request.
1) At U
e
= 220 V DC.
2) At U
e
= 300 V DC.
3) At U
e
= 600 V DC.
4) At U
e
= 1000 V DC.
Size II
Type
3WL12 10 3WL12 20 3WL12 40
Rated current I
n
at 40 °C
Main conductor A
... 1000 2000 4000
Rated operational voltage U
e
(1000 V version, see Catalog LV 1, order code "A05")
V DC
... 600/1000 ... 600/1000 ... 600/1000
Rated insulation voltage U
i
V DC 1000 1000 1000
Rated impulse withstand voltage U
imp
• Main current paths
• Auxiliary circuits
• Control circuits
kV
kV
kV
12
4
2.5
12
4
2.5
12
4
2.5
Isolating function acc. to EN 60947-2 Yes Yes Yes
Permissible ambient temperature
•Operation
•Storage
° C
° C
–25/+75
–40/+70
–25/+75
–40/+70
–25/+75
–40/+70
Permissible load
At rear horizontal main circuit
connections
(Cu painted black)
Up to 40 ° C
Up to 55 ° C
Up to 60 ° C
Up to 70 ° C
A
A
A
A
1000
1000
1000
1000
2000
2000
2000
1950
4000
3640
3500
3250
Power loss at I
n
for symmetrical loads
Withdrawable circuit breakers W
280 770 1640
Operating times
• Make-time
• Opening time
• Electrical make-time (through activation solenoid)
1)
• Electrical opening time (through shunt release)
• Electrical opening time (instantaneous undervoltage release)
ms
ms
ms
ms
ms
35
34
100
73
73
35
34
100
73
73
35
34
100
73
73
Endurance
3)
• Mechanical (without maintenance) Oper. cycles
• Mechanical (with maintenance)
2)
Oper. cycles
• Electrical (without maintenance) Oper. cycles
• 1000 V version Oper. cycles
• Electrical (with maintenance)
2)
Oper. cycles
10 000
15 000
6000
1000
15 000
10 000
15 000
6000
1000
15 000
10 000
15 000
4000
1000
15 000
Switching frequency
• 600 V version
• 1000 V version
1/h
1/h
60
20
60
20
60
20
Mounting position
Degree of protection IP20 without cabinet door, IP41 with door sealing
frame, IP55 with cover
Auxiliary conductors (Cu)
Max. number of
auxiliary conductors ×
cross-section
(solid/stranded)
Standard connection = strain-relief clamp
• Without end sleeve
• With end sleeve acc. to DIN 46228 Part 2
• With twin end sleeve
2 × 0.5 mm
2
(AWG 20) ... 2 × 1.5 mm
2
(AWG 16); 1 × 2.5 mm
2
(AWG 14)
1 × 0.5 mm
2
(AWG 20) ... 1 × 1.5 mm
2
(AWG 16)
2 × 0.5 mm
2
(AWG 20) ... 2 × 1.5 mm
2
(AWG 16)
Optional connection = tension spring
• Without end sleeve
• With end sleeve acc. to DIN 46228 Part 2
2 × 0.5 mm
2
(AWG 20) ... 2 × 2.5 mm
2
(AWG 14)
2 × 0.5 mm
2
(AWG 20) ... 2 × 1.5 mm
2
(AWG 16)
Weights 3-pole
4-pole
• Fixed-mounted circuit breakers
• Withdrawable circuit breakers
• Guide frames
• Fixed-mounted circuit breakers
• Withdrawable circuit breakers
• Guide frames
kg
kg
kg
kg
kg
kg
56
60
31
67
72
37
56
60
31
67
72
37
64
68
45
77
82
54
N S E 0 _ 0 0 0 6 1 a
3 0 °
3 0 °
N S E 0 _ 0 0 0 6 2 a
3 0 ° 3 0 °
N S E 0 _ 0 0 9 2 7 a
h
= 1 m m
m a x .
Size II
Type 3WL12
Switching capacity class DC
Short-circuit breaking capacity
Up to 220 V DC
Up to 300 V DC
Up to 600 V DC
Up to 1000 V DC
I
cc
I
cc
I
cc
I
cc
kA
kA
kA
kA
35
30
25
20
Rated short-time withstand current I
cw
0.5 s
1 s
2 s
3 s
kA
kA
kA
kA
--
35
1)
/30
2)
/25
3)
/20
4)
--
--
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