ABB PQFS User Manual

42 Electrical design and installation  Manual Power Quality Filter PQFS
Table 20: 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
0.911
260 220
0.95
210
120 4/0 1 1 325
0.88
286 250
0.93
233
150 300MCM 1 1 365
0.85
310 285
0.91
260
185 350MCM 1 1 415
0.817
339 325
0.89
288
240 500MCM 1 1 495
0.775
383 385
0.85
326
300 600MCM 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 300MCM 2 0.8 584
0.85
496 456
0.91
416
185 350MCM 2 0.8 664
0.817
542 520
0.89
460
240 500MCM 2 0.8 792
0.775
613 616
0.85
522
300 600MCM 2 0.8 880
0.738
649 680
0.81
553
Remark: The highlighted values in Table 20 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.
6.7 Selection of the power cable protection/filter input protection
scheme
Once the power cables have been selected, a suitable cable and equipment protection
has to be selected. The protection only needs to protect the phases and not the neutral.
It is recommended to use fuses of type gG/gL with the RMS current ratings given in
Table 21.

ABB PQFS Specifications

General

Brand	ABB
Model	PQFS
Category	Industrial Electrical
Language	English