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Switch Disconnectors
3KA, 3KE Switch Disconnectors up to 1000 A
Introduction
7/34
Siemens LV 10 · 2014
7
Standards
IEC 60947-1, IEC 60947-3, VDE 0660 Part 107
Type
3KE42
3KE43
3KE44
3KE45
Rated uninterrupted current
I
u
A 250
400
630
1000
Rated insulation voltage
U
i
V 1000 AC, 1200 DC
Rated impulse withstand voltage
U
imp
kV 8
8
8
8
Rated operational voltage
U
e
50/60 Hz AC
V 690
DC
V 440 (3 conducting paths series-connected)
V 220 (2 conducting paths series-connected)
Rated short-circuit making capacity
I
cm
kA
35
35
60
60
At 50/60 Hz 690 V AC, peak value
Rated short-circuit making capacity with upstream fuses
kA
105
105
105
84
At 50/60 Hz 690 V AC, peak value
Rated conditional short-circuit current
with upstream fuses
A 50
50
50
40
At 50/60 Hz 690 V AC (rms value)
Maximum permissible let-through
I
2
t
value
kA
2
s 2150
2150
5400
19000
Permissible let-through current of an upstream circuit
breaker
At 50/60 Hz 690 V AC, peak value
kA
35
35
60
60
Max. rated current
I
n
of the fuse
A 400
400
630
1000
Permissible let-through current of the fuses (peak value)
kA
38
38
60
75
Breaking capacity
(infeed from the top or bottom)
At 400 V AC
• Breaking current
I
c
(at p.f. = 0.35, rms value)
A
1000
1000
2520
2520
• Rated operational current
I
e
at
- AC-21A
A 250
400
630
1000
- AC-22A
A 250
330
630
800
- AC-23A
A 125
125
315
315
At 500 V AC
• Breaking current
I
c
(at p.f. = 0.35, rms value)
A
1000
1000
2520
2520
• Rated operational current
I
e
at
- AC-21A
A 250
400
630
1000
- AC-22A
A 250
330
630
800
- AC-23A
A 125
125
315
315
At 690 V AC
• Breaking current
I
c
(at p.f. = 0.35, rms value)
A
1 000
1000
2520
2520
• Rated operational current
I
e
at
- AC-21A
A 250
400
630
1000
- AC-22A
A 250
330
630
800
- AC-23A
A 125
125
315
315
At 440 V DC (3 conducting paths series-connected)
• Breaking current
I
c
(
L/R
= 5 ms)
A 1000
1000
2520
2520
• Rated operational current
I
e
at
- DC-21A
A 250
400
630
1000
- DC-22A
A 250
250
630
630
Rated short-time current
I
cw
(1 s current, rms value)
kA
12.5
12.5
21
21
Permissible ambient temperature
°C -25 ... +55 for operation
°C -50 ... +80 when stored
Mechanical endurance,
operating cycles
10 000
Degree of protection
IP00
Power loss of the switch disconnector at
I
th
W 15
33
78
180
Main conductor connections
Busbar systems, max. dimensions (W x T)
mm 25 x 10
25 x 10
2 x 40 x 10
2 x 40 x 10
Cable lug, max. conductor cross-section (stranded)
mm
2
2 x 150
2 x 150, 1 x 240
2 x 240
2 x 240
© Siemens AG 2014