28
INSTALLATION
3
Table 3.1- Recommended fuses
Type
SSW-03 Plus (A)
120
170
205
255
290
340
410
475
580
670
800
950
1100
1400
Standard Connection
I
N
(A)
250
315
450
500
500
700
700
900
900
900
1400
1600
1600
2000
Within the Motor Delta
Connection
I
N
(A)
450
500
700
700
700
700
1250
1400
1600
1600
2000
2200
-
-
I²t of the SCR
(A²s)
119.3k
256k
330k
370k
370k
370k
1452k
4250k
4250k
4250k
4250k
14000k
14000k
15125k
The input fuses must be of ultrarapid type (U.R.). I²t must be
smaller or equal to 75% of the SCR value indicated above
(A²s). These fuses protect the SCR against short-circuit. In-
stead of U.R. fuses you can also use normal fuses that protect
the installation against short-circuit, but this type of fuse does
not protect the SCR.
Table 3.2 – Recommended cables for Standard Connection (100% and 120%I
N
)
Type
SSW-03
Plus (A)
120
170
205
255
290
340
410
475
580
670
800
950
1100
1400
Standard Connection
Rated Current 100%
Current
100% (A)
120
170
205
255
290
340
410
475
580
670
800
950
1100
1400
Cables
(mm
2
)
35
70
95
120
150
185
240
300
2 x 150
2 x 185
2 x 240
2 x 300
4 x 150
4 x 185
Bus
mm x mm
12 x 2
20 x 3
20 x 3
25 x 5
25 x 5
25 x 5
30 x 5
40 x 5
40 x 5
40 x 10
40 x 10
50 x 10
60 x 10
80 x 10
Maximum Current 120%
Current
120% (A)
144
204
246
306
348
408
492
570
696
804
960
1140
1320
1680
Bus
(mm
2
)
50
95
120
150
185
240
2 x120
2 x 150
2 x 185
2 x 240
2 x 300
4 x 150
4 x 185
4 x 240
Bus
mm x mm
20 x 3
20 x 3
20 x 3
25 x 5
25 x 5
30 x 5
40 x 5
40 x 5
40 x 10
40 x 10
50 x 10
60 x 10
80 x 10
100 x 10
Grounding
Cables
(mm²)
25
35
50
70
95
95
120
150
150
185
240
300
2 x 150
2 x 185
