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Siemens 3KA50 Brochure
SENTRIC KL Switch Disconnectors with Fuses
General data
■
Area of application
SENTRIC KL switch disconnectors with fuses protect against
overload and short-circuits as main control and EMERGENCY-
STOP switches of switchpanels, distribution boards, power sup-
ply and motor feeders. In conjunction with SITOR semiconductor
protection fuses, they are also used in UPS systems, frequency
converters and capacitor control systems.
■
Technical specifications
Standards
Type
Rated uninterrupted current I
For fuse links to DIN 43620
(when semiconductor fuse links are used, derating is nec-
essary, see Catalog SITOR Configuration SENTRIC KL
Switch Disconnectors with Fuses
Order No. E20001–A700–P302-X-7600)
Continuous thermal current I
Rated insulation voltage U
Rated impulse withstand voltage U
Rated operating voltage U
7
AC 50 Hz/60 Hz
DC
Rated short-circuit making capacity with fuses
at AC 50 Hz/60 Hz 690 V
Rated conditional short-circuit current with fuses
at AC 50 Hz/60 Hz 690 V
Max. rated current I
of the fuses
n
Max. permissible power loss of the installed fuse
NH
BS
Permissible let-through current of the fuses
Maximum permissible cut-off I
Switching capacity (infeed top or bottom)
at AC 400 V
Breaking current I
(p.f. = 0.35)
c
Rated operating current I
Motor switching capacity at AC-23A
at AC 500 V
Breaking current I
(p.f. = 0.35)
c
Rated operating current I
Motor switching capacity at AC-23A
at AC 690 V
Breaking current I
(p.f. = 0.35)
c
Rated operating current I
Motor switching capacity at AC-23A
at DC 440 V (3 series-connected current path)
Breaking current I
(L/R = 15 ms)
c
Rated operating current I
Rated short-time current (1 s current)
Permissible load
depending on the ambient temperature for open-type instal-
lation in switchboards (e.g. 8NA1) in switchgear cubicles or
switchgear racks at
35 °C
40 °C
45 °C
50 °C
55 °C
Permissible ambient temperature
Mechanical endurance
Required operating torque
Degree of protection
Power loss of the disconnector at I
(plus power loss of the fuses)
1) Technical specifications for CSA approval on request.
2) With 3KL61 for operation –25 °C ... +35 °C, at +55 °C: I
3) Configuring note: max. permissible operating temperature for fuse blades
135°C, for connections 100 °C.
4) 3ND1 switchgear protection fuses.
7/22
Siemens LV 10 · 2004
A
u
Size
3)
A
th
V
i
kV
imp
e
V
V
2)
kA (peak value)
2)
kA (rms value)
A
W
W
kA
2
t value
kA
A (rms value)
at AC-21A, AC-22A, AC-23A
A
e
kW
A (rms value)
at AC-21A, AC-22A, AC-23A
A
e
kW
A (rms value)
at AC-21A, AC-22A, AC-23A
A
e
kW
A
at DC-23A
A
e
kA (rms value)
A
A
A
A
A
°C
Operations
Nm
W
th
= 570 A.
th
For use in the paper and pulp processing industry, a special
variant that is resistant to strongly sulphurous atmospheres can
be supplied.
All SENTRIC KL switch disconnectors are climate-proof and
meet the requirements of IEC 60947-1, IEC 60947-3 and
VDE 0660 Part 107.
IEC 60 947-1, IEC 60 947-3, VDE 0660 Part 107
3KL50
3KL52
63
125
00 and
00 and
000
000
63
125
690
1000
6
8
690
440 (3 conducting paths series-connected),
220 (2 conducting paths series-connected)
220
220
100
100
80
160
6
9
8 (A2/A3)
11.5 (A4)
8
17
2
s
55
223
500
1000
63
125
30
65
500
1000
63
125
40
90
500
1000
63
125
50
110
250
500
63
125
2.5
3.2
63
125
63
125
63
125
63
125
63
125
–25 ... +55 for operation
15000
15000
3
7.5
IP00/IP20 (from operator side, with fuse and terminal covers)
8.5
22
5) AC-23B.
6) At 440 V L/R = 4 ms, at 220 V L/R = 15 ms.
7) L/R = 2.5 ms.
8) At 440 V DC-22A, at 220 V DC-23A.
1)
1)
3KL53
3KL55
3KL57
3KL61
160
250
400
630
00 and
1 and 2
1 and 2
3 and 2
000
160
250
400
630
1000
1000
1000
1000
8
8
8
8
220
176
176
105
100
80
80
50
160
400
400
630
11.5
32
45
48
11.5
32
45
48
4)
4)
17
30
30
50
223
1000
1000
5400
1280
2000
3200
5100
160
250
400
630
80
132
200
335
1280
2000
3200
5100
160
250
400
630
110
185
280
425
1280
2000
3200
5100
160
250
400
630
150
220
375
560
6)
640
100
1600
2520
8)
160
250
400
630
3.2
8
11
32
160
250
400
630
155
250
390
630
150
250
380
610
145
250
370
590
140
240
360
570
4)
, –50 ... +80 for storage
15000
12000
12000
3000
7.5
16
16
30
36
33
86
140
1)
1)
3KL62
800
3 and 2
800
1000
8
105
50
800
62
60.5
50
10500
6400
5)
5)
800
400
6400
5)
5)
630
500
6400
5)
5)
800
700
7)
7)
2520
8)
8)
630
32
800
780
760
740
720
3000
30
225