ABB PQFS Installation, Operation And Maintenance Instructions page 40

Table 17: Allowed cable current for different cable sections noting the skin effect
Cross section
Nr of
parallel
cables
[mm²] [AWG]
16 6 1
25 4 1
35 2 1
50 1-1/0 1
70 2/0 1
95 3/0 1
120 4/0 1
150 300MCM 1
185 350MCM 1
240 500MCM 1
300 600MCM 1
16 6 2
25 4 2
35 2 2
50 1-1/0 2
70 2/0 2
95 3/0 2
120 4/0 2
150 300MCM 2
185 350MCM 2
240 500MCM 2
300 600MCM 2
Remark: The highlighted values in
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.
40 Electrical design and installation ç Manual Power Quality Filter PQFS
As an example of the cable sizing procedure, consider
which show the allowed current for different parameters noting typical cable
manufacturer data.
WARNING: Consult your cable manufacturer for the applicable cable.
and typical cable manufacturer data – Network frequency 50Hz
Derating Rated
due to current
paralleling [Arms]
1 100
1 130
1 160
1 190
1 230
1 285
1 325
1 365
1 415
1 495
1 550
0.8 160
0.8 208
0.8 256
0.8 304
0.8 368
0.8 456
0.8 520
0.8 584
0.8 664
0.8 792
0.8 880
Copper
Allowed
Reduction
current
factor
[Arms]
0.997 100
0.993 125
0.987 158
0.975 185
0.955 220
0.93 265
0.904 290
0.877 320
0.844 350
0.804 390
0.768 420
0.997 159
0.993 205
0.987 250
0.975 290
0.955 350
0.93 420
0.904 470
0.877 510
0.844 560
0.804 630
0.768 675
Table 17 refer to cable sizes that correspond to typical
Table 17 and Table
Aluminum
Rated
Reduction
current
factor
[Arms]
75 0.999
100 0.997
120 0.994
145 0.989
180 0.98
220 0.965
250 0.95
285 0.93
325 0.908
385 0.876
425 0.843
120 0.999
160 0.997
192 0.994
232 0.989
288 0.98
352 0.965
400 0.95
456 0.93
520 0.908
616 0.876
680 0.843
18,
Allowed
current
[Arms]
75
100
119
142
176
210
238
265
295
335
358
120
160
190
229
282
340
380
424
472
540
573