Switch Disconnectors and Fuses Brochure
Siemens LV 10 · 2004
7/22
SENTRIC KL Switch Disconnectors with Fuses
General data
7
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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.
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.
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Technical specifications
1) Technical specifications for CSA approval on request.
2) With 3KL61 for operation –25 °C ... +35 °C, at +55 °C: I
th
=570A.
3) Configuring note: max. permissible operating temperature for fuse blades
135°C, for connections 100 °C.
4) 3ND1 switchgear protection fuses.
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.
Standards IEC 60 947-1, IEC 60 947-3, VDE 0660 Part 107
Type
3KL50 3KL52 3KL53 3KL55
1)
3KL57
1)
3KL61
1)
3KL62
1)
Rated uninterrupted current I
u
A 63 125 160 250 400 630 800
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)
Size
00 and
000
00 and
000
00 and
000
1 and 2 1 and 2 3 and 2 3 and 2
Continuous thermal current I
th
3)
A 63 125 160 250 400 630 800
Rated insulation voltage
U
i
V 690 1000 1000 1000 1000 1000 1000
Rated impulse withstand voltage
U
imp
kV 6 8 8 8 8 8 8
Rated operating voltage
U
e
AC 50 Hz/60 Hz V 690
DC V
440 (3 conducting paths series-connected),
220 (2 conducting paths series-connected)
Rated short-circuit making capacity with fuses
2)
at AC 50 Hz/60 Hz 690 V
kA (peak value)
220 220 220 176 176 105 105
Rated conditional short-circuit current with fuses
2)
at AC 50 Hz/60 Hz 690 V
kA (rms value)
100 100 100 80 80 50 50
Max. rated current I
n
of the fuses A 80 160 160 400 400 630 800
Max. permissible power loss of the installed fuse
NH W 6 9 11.5 32 45 48 62
BS W
8 (A2/A3) 11.5 (A4) 11.5 32 45 48 60.5
Permissible let-through current of the fuses kA
8 17 17 30
4)
30
4)
50 50
Maximum permissible cut-off I
2
t value kA
2
s 55 223 223 1000 1000 5400 10500
Switching capacity (infeed top or bottom)
at AC 400 V
Breaking current I
c
(p.f. = 0.35) A (rms value) 500 1000 1280 2000 3200 5100 6400
Rated operating current I
e
at AC-21A, AC-22A, AC-23A A 63 125 160 250 400 630
5)
800
5)
Motor switching capacity at AC-23A kW 30 65 80 132 200 335 400
at AC 500 V
Breaking current I
c
(p.f. = 0.35) A (rms value) 500 1000 1280 2000 3200 5100 6400
Rated operating current I
e
at AC-21A, AC-22A, AC-23A A 63 125 160 250 400 630
5)
630
5)
Motor switching capacity at AC-23A kW 40 90 110 185 280 425 500
at AC 690 V
Breaking current I
c
(p.f. = 0.35) A (rms value) 500 1000 1280 2000 3200 5100 6400
Rated operating current I
e
at AC-21A, AC-22A, AC-23A A 63 125 160 250 400 630
5)
800
5)
Motor switching capacity at AC-23A kW 50 110 150 220 375 560 700
at DC 440 V (3 series-connected current path)
Breaking current I
c
(L/R = 15 ms) A 250 500 640 100
6)
1600 2520
7)
2520
7)
Rated operating current I
e
at DC-23A A 63 125 160 250
8)
400 630
8)
630
8)
Rated short-time current (1 s current) kA (rms value) 2.5 3.2 3.2 8 11 32 32
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 A 63 125 160 250 400 630 800
40 °C A
63 125 155 250 390 630 780
45 °C A
63 125 150 250 380 610 760
50 °C A
63 125 145 250 370 590 740
55 °C A
63 125 140 240 360 570 720
Permissible ambient temperature °C
–25 ... +55 for operation
4)
, –50 ... +80 for storage
Mechanical endurance Operations 15000 15000 15000 12000 12000 3000 3000
Required operating torque Nm
3 7.5 7.5 16 16 30 30
Degree of protection
IP00/IP20 (from operator side, with fuse and terminal covers)
Power loss of the disconnector at I
th
(plus power loss of the fuses)
W
8.5 22 36 33 86 140 225