Switch Disconnectors and Fuses Brochure
Siemens LV 10 · 2004
7/13
SENTRIC Switch Disconnectors
SENTRIC K Switch Disconnectors from 63 A to 1000 A
General data
7
1) Technical specifications for CSA approval on request.
Standards IEC 60947-1, IEC 60947-3, VDE 0660 Part 107
Type
3KA50 3KA51 3KA52 3KA53
1)
3KA55 3KA57
1)
3KA58
Mechanical endurance operations
15000 15000 15000 15000 12000 12000 12000
Required operating torque Nm
3 3 7.5 7.5 16 16 16
Degree of protection
IP00/IP20 (from operator side, with busbar and terminal covers)
Power loss of the switch at I
th
W 7 12 22 22 33 72 170
Main conductor connection
Busbar systems, max. dimensions (w × t) mm × mm 25 × 9 25 × 9 45 × 10 45 × 10 40 × 12 40 × 12 40 × 15
Cable lug, max. conductor cross-section (stranded) mm
2
35 35 70 120 150 2 × 150
or
1 × 240
2 × 240
Tightening torque Nm
6 ... 7.5 6 ... 7.5 7 ... 10 18 ... 22 35 ... 45 35 ... 45 35 ... 45
Terminal screws
M 6 M 6 M 6 M 8 M 10 M 10 M 10
PE/ground-conductor connection
Flat bars mm × mm – – – – 20 × 2.5 20 × 2.5 20 × 2.5
Cable lug, max. conductor cross-section (stranded) mm
2
– – – – 70 120 120
4th pole
Rated uninterrupted current I
u
A – – – 125 400 400 400
Rated operating current I
e
at AC-21A, AC 690 V A – – – 125 400 400 400
Main conductor connection
Flat bars
Cable lug max. conductor cross-section (stranded)
mm × mm
mm
2
–
–
–
–
–
–
15 × 3
70
25 × 4
240
25 × 4
240
25 × 4
240
Auxiliary switch 1 NO + 1 NC (accessory)
Max. number to be plugged 1 1 2 2 2 2 2
Rated operating current I
e
at AC 50 Hz/60 Hz
I
e
/AC-12
I
e
/AC-15 at U
e
= 220 V/230 V
I
e
/AC-15 at U
e
= 380 V/400 V
I
e
/AC-15 at U
e
= 500 V
I
e
/AC-15 at U
e
= 690 V
A
A
A
A
A
10
6
4
2.5
21.2
Rated operating current I
e
at DC
I
e
/DC-13 at U
e
= 24 V
I
e
/DC-13 atU
e
= 48 V
I
e
/DC-13 at U
e
= 110 V
I
e
/DC-13 at U
e
= 220 V
I
e
/DC-13 at U
e
= 440 V
A
A
A
A
A
10
4
1.2
0.4
0.2
Connection
solid
flexible with end sleeve
mm
2
mm
2
2 × (1 ... 2.5)
2 × (0.5 ... 1.5)
Weight
Complete version kg 1.324 1.322 2.560 2.560 5.400 6.401
Basic version kg
1.040 1.039 2.200 2.200 5.360 5.963