ABB PQFM - Selection of Power Cable and Filter Input Protection Schemes

50 Electrical design and installation  Manual Power Quality Filter PQFM
Table 19: Allowed cable current for different cable sections noting the skin effect and typical
cable manufacturer data – Network frequency 60Hz
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
0.996
99 75
1
75
25 4 1 1 130
0.99
128 100
1
100
35 2 1 1 160
0.981
157 120
0.99
119
50 1-1/0 1 1 190
0.965
183 145
0.98
143
70 2/0 1 1 230
0.941
216 180
0.97
175
95 3/0 1 1 285
0.91 1
260 220
0.95
210
120 4/0 1 1 325
0.88
286 250
0.93
233
150 300MC
M
1 1 365
0.85
310 285
0.91
260
185 350MC
M
1 1 415
0.817
339 325
0.89
288
240 500MC
M
1 1 495
0.775
383 385
0.85
326
300 600MC
M
1 1 550
0.738
406 425
0.81
346
16 6 2 0.8 160
0.996
159 120
1
120
25 4 2 0.8 208
0.99
205 160
1
160
35 2 2 0.8 256
0.981
250 192
0.99
190
50 1-1/0 2 0.8 304
0.965
293 232
0.98
228
70 2/0 2 0.8 368
0.941
346 288
0.97
280
95 3/0 2 0.8 456
0.911
415 352
0.95
336
120 4/0 2 0.8 520
0.88
457 400
0.93
374
150 300MC
M
2 0.8 584
0.85
496 456
0.91
416
185 350MC
M
2 0.8 664
0.817
542 520
0.89
460
240 500MC
M
2 0.8 792
0.775
613 616
0.85
522
300 600MC
M
2 0.8 880
0.738
649 680
0.81
553
6.7 Selection of the power cable protection/filter input protection
scheme
The filter and its feeding cable must be protected by an appropriate mechanism.
6.7.1 CE version protection scheme
Standard CE versions of active filter do not have an incorporated power circuit
protection. This one can optionally be obtained. Alternatively, the customer can install