Siemens AC-21 Brochure page 12

SENTRIC Switch Disconnectors
SENTRIC K Switch Disconnectors from 63 A to 1000 A
General data
■
Technical specifications
Standards
Type
Rated uninterrupted current I
Continuous thermal current I
Rated insulation voltage U
Rated impulse withstand voltage U
Rated operating voltage U
AC 50 Hz/60 Hz
DC
Rated short-circuit making capacity
4
with back-up fuses )
at AC 50 Hz/60 Hz 690 V
Rated conditional short-circuit current with series-
4
connected fuses )
at AC 50 Hz/60 Hz 690 V
Max. rated current I of the fuses
n
Permissible let-through current of the fuses
Maximum permissible let-through I
Permissible let-through current of a series-con-
nected circuit-breaker
7
at AC 50 Hz/60 Hz 690 V
Rated short-circuit making capacity
without fuses
at AC 50 Hz/60 Hz 690 V
Switching capacity (infeed top or bottom)
at AC 400 V
Breaking current I (p.f. = 0.35)
c
Rated operating current I
AC-21A, AC-22A, AC-23A
Motor switching capacity at AC-23A
At AC 500 V
Breaking current I (p.f. = 0.35)
c
Rated operating current I
AC-21A, AC-22A
AC-23A
Motor switching capacity at AC-23A
at AC 690 V
Breaking current I (p.f. = 0.35)
c
Rated operating current I
AC-21A, AC-22A
AC-23A
Motor switching capacity at AC-23A
at DC 440 V (3 conducting paths connected in series)
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
installation in switchboards (e.g. 8NA1) in switchgear
cubicles or switchgear racks at
35 °C
40 °C
45 °C
50 °C
55 °C
60 °C
Permissible ambient temperature
1) Technical specifications for CSA approval on request.
2) Configuring note: max. permissible operating temperature at connections
100 °C.
3) With 3KA58 for operation –25 °C ... +35 °C, 570 A at 55 °C.
4) Only for 3NA38, 3NA32 or 3ND18, 3ND12 fuses (105 kA/50 kA for others).
5) 3ND1 switchgear protection fuses.
6) AC-23B.
7) At 440 V L/R = 4 ms, at 220 V L/R = 15 ms.
8) At 440 V DC-22A, at 220 V DC-23A.
7/12 Siemens LV 10 · 2004
A
u
2)
A
th
V
i
kV
imp
e
V
V
kA (peak value)
kA (rms value)
A
kA
2 2
t value kA s
kA (peak value)
kA (peak value)
A (rms value)
at
e
A
kW
A (rms value)
at
e
A
A
kW
A (rms value)
at
e
A
A
kW
A
at DC-23A A
e
kA (rms value)
A
A
A
A
A
A
°C
IEC 60947-1, IEC 60947-3, VDE 0660 Part 107
3KA50 3KA51 3KA52
63 80 125
63 80 125
690 690 1000
6 6 8
690
440 (3 conducting paths series-connected),
220 (2 conducting paths series-connected)
220 220 220
100 100 100
63 80 160
8 10 17
55 55 223
7 8 8
7 7 7
500 650 1000
63 80 125
30 40 65
500 640 1000
63 80
63 80 125
40 50 90
500 500 1000
63 80 125
63 63 125
50 50 110
250 260 500
63 63 125
2.5 2.5 3.2
63 80 125
63 80 125
63 80 125
63 80 125
63 80 125
63 80 125
–25 ... +55 for operation, –50 ... +80 for storage
1) 1)
3KA53 3KA55 3KA57
160 250 400
160 250 400
1000 1000 1000
8 8 8
220 220 220
100 80 80
160 400 400
5) 5)
17 30 30
223 1000 1000
15 25 25
9 20 25
1280 2000 3200
160 250 400
80 132 200
1280 2000 3200
160 250 400
160 250 400
110 185 280
1280 2000 3200
160 250 400
160 250 400
150 220 375
7)
640 1000 1600
8)
160 250 400
3.2 8 11
160 250 400
160 250 400
160 250 400
160 250 400
160 250 400
160 250 400
3)
3KA58
3)
630
3)
630
1000
8
220
50
630
5)
40
2600
32
35
5040
6)
630
350
3200
630
6)
400
280
3200
630
6)
400
375
1600
400
15
630
620
600
580
560
550