Manual Power Quality Filter PQFS
Electrical design and installation 41
WARNING: Consult your cable manufacturer for the applicable cable manufacturer
data.
Table 19: Allowed cable current for different cable sections noting the skin effect and typical
cable manufacturer data – Network frequency 50Hz
Copper
Aluminum
Cross section
Nr of
parallel
cables
Derating
due to
paralleling
Rated
current
[Arms]
Reduction
factor
Allowed
current
[Arms]
Rated
current
[Arms]
Reduction
factor
Allowed
current
[Arms]
[mm²]
[AWG]
16
6
1
1
100
0.997
100
75
0.999
75
25
4
1
1
130
0.993
125
100
0.997
100
35
2
1
1
160
0.987
158
120
0.994
119
50
1-1/0
1
1
190
0.975
185
145
0.989
142
70
2/0
1
1
230
0.955
220
180
0.98
176
95
3/0
1
1
285
0.93
265
220
0.965
210
120
4/0
1
1
325
0.904
290
250
0.95
238
150
300MCM
1
1
365
0.877
320
285
0.93
265
185
350MCM
1
1
415
0.844
350
325
0.908
295
240
500MCM
1
1
495
0.804
390
385
0.876
335
300
600MCM
1
1
550
0.768
420
425
0.843
358
16
6
2
0.8
160
0.997
159
120
0.999
120
25
4
2
0.8
208
0.993
205
160
0.997
160
35
2
2
0.8
256
0.987
250
192
0.994
190
50
1-1/0
2
0.8
304
0.975
290
232
0.989
229
70
2/0
2
0.8
368
0.955
350
288
0.98
282
95
3/0
2
0.8
456
0.93
420
352
0.965
340
120
4/0
2
0.8
520
0.904
470
400
0.95
380
150
300MCM
2
0.8
584
0.877
510
456
0.93
424
185
350MCM
2
0.8
664
0.844
560
520
0.908
472
240
500MCM
2
0.8
792
0.804
630
616
0.876
540
300
600MCM
2
0.8
880
0.768
675
680
0.843
573
Remark: The highlighted values in
refer to cable sizes that correspond to typical
filter ratings. Note that in 4-wire systems, the neutral may have to carry up to 3 times
the line current rating of the filter.