Notes on installation of power cables
1cable and heat pipe parallel installation, should keep 2m distance, cross should maintain 0.5m.
2the cable and other pipes in parallel or cross installation, to maintain the distance of 0.5m.
3when the cable is installed directly, the buried depth of 1-35kV cable shall be no less than 0.7m.
410kV and below cable parallel installation, mutual net distance is not less than 0.1M, 10-35kV is not less than 0.25m, cross distance is not less than 0.5m.
5the minimum bending radius of cable, multi-core cable shall not be less than 15D, single core cable shall not be less than 20D (D for cable diameter).
66kV and above cable joint
a、installation of cable terminal, must be stripped of semi conductive shielding layer, the operation may damage insulation, should avoid marks and uneven situation, when necessary using sandpaper; shielding ends should be formed, and the graphite layer (carbon particles) clean.
b、plastic insulated cable end copper shield and the steel armor must be well grounded, the short line should also follow this principle, to avoid unbalanced operation when the steel armor end dynamic induction, even sparking and burning accident of sheath. Ground outlet to the tin copper and iron soldering copper cable application connection, should not be used to avoid burning torch welding, insulation.
cthree-phase copper shielding should be respectively connected with a ground line, pay attention to shield grounding wire and steel armor wire should be insulated from each other are led, welding wire position should be under.
7the basic requirements for the cable terminal head and middle connector: A. B. good conductors; reliable insulation, recommended the use of irradiation cross-linked heat shrinkable silicone rubber insulation material; C. good seal; D. enough mechanical strength, can adapt to various operating conditions.
8cable ends must be waterproof, corrosion and other corrosive materials, to prevent the insulation aging and breakdown caused by water tree.
9cable loading and unloading must use the crane and forklift, prohibit flat, flat, large cable installation must use cable car, so as to avoid cable by external force damage or artificial drag and scrape the sheath and insulation layer. The cable is not mounted, so the conductor is not allowed to be bent by hand. The conductor is damaged and the insulation is short circuited.
10if the cable can not be laid in time, it should be stored in a dry place, to prevent sunlight exposure, cable end water inlet and so on.
Attention: the installation of wires and cables should be done by the installation personnel or full-time technical personnel who are familiar with the performance of wires and cables. If there are still unclear matters, please consult the relevant technical department or our technical department in a timely manner.
0.6/1KV copper core PVC insulated power cables are installed in air for long term continuous load, allowing ampacity
|
Section
（mm2）
|
Allowable Ampacity for long term continuous load（A）
|
|
No armour
|
Armored
|
|
Single core
|
Double core
|
Three core
|
Five core
|
Single core
|
Double core
|
Three core
|
Five core
|
|
2root
|
3root
|
Four core
|
（4+1）core
|
2root
|
3root
|
Four core
|
（4+1）core
|
|
|
|
（3+1）core
|
（3+2）core
|
|
|
（3+1）core
|
（3+2）core
|
|
1.5
2.5
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
|
28
36
47
60
83
109
138
173
207
264
322
374
431
495
587
673
794
920
1058
|
23
30
39
49
68
89
113
142
170
216
264
307
353
406
491
552
652
754
868
|
26
33
44
16
77
101
128
161
193
246
299
348
401
460
546
626
738
856
984
|
20
26
37
44
61
82
104
127
155
190
242
282
322
368
--
--
--
--
--
|
--
--
30
37
53
69
89
109
132
167
213
242
282
322
385
431
--
--
--
--
|
--
--
31
38
54
70
91
111
135
170
217
247
288
328
393
440
--
--
--
|
28
36
47
60
83
109
138
173
207
264
322
374
431
495
587
673
794
920
1058
|
23
30
39
49
68
89
113
142
170
216
264
307
353
406
481
552
652
754
868
|
26
33
44
56
77
101
128
161
193
246
299
348
401
460
546
626
738
856
984
|
--
--
38
45
62
84
106
130
158
194
247
288
328
375
--
--
--
--
--
|
--
--
31
38
54
70
91
111
135
170
217
246
287
327
392
439
--
--
--
|
--
--
32
39
55
71
91
112
137
173
221
250
290
330
398
445
--
--
--
|
0.6/1KVPermissible load carrying capacity of aluminum core PVC insulated power cables under long continuous load in air
|
Nominal cross section（mm2）
|
Allowable Ampacity for long term continuous load（A）
|
|
No armour
|
Armored
|
|
Single core
|
Double core
|
Three core
|
Five core
|
Single core
|
Double core
|
Three core
|
Five core
|
|
2root
|
3root
|
Four core
|
（4+1）core
|
2root
|
3root
|
Four core
|
（4+1）core
|
|
|
|
（3+1）core
|
（3+2）core
|
|
|
（3+1）core
|
（3+2）core
|
|
2.5
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
|
28
37
48
63
84
110
132
161
201
247
288
334
385
454
523
621
725
851
|
23
30
40
52
69
90
108
132
165
203
236
274
316
372
429
509
595
695
|
26
34
45
59
78
102
123
150
187
230
268
311
358
422
486
578
674
791
|
21
28
37
48
63
81
99
121
150
190
219
247
288
--
--
--
--
--
|
17
23
30
40
54
69
85
104
132
161
190
219
247
299
339
--
--
--
|
17
23
31
41
55
70
87
106
135
164
194
223
282
305
346
--
--
--
|
28
37
48
63
84
110
132
161
201
247
288
334
385
454
523
621
725
851
|
23
30
40
52
69
90
108
132
165
203
236
274
316
372
429
509
595
698
|
26
34
45
59
78
102
123
150
187
230
268
311
358
422
486
578
674
791
|
--
28
37
48
63
81
99
121
150
190
219
247
288
--
--
--
--
--
|
--
23
30
40
54
69
85
104
132
161
190
219
247
299
399
--
--
--
|
--
23
31
41
55
70
87
106
135
164
194
223
252
305
346
--
--
--
|
0.6/1kVPermissible load carrying capacity of XLPE insulated power cables under long continuous load in air
|
0.6/1kVXLPE insulated power cable
|
Rated voltageU/U
|
0.6／IkV
|
|
Model
|
YJV、YJLV、YJY、YJLY
|
YJV、YJLV、YJY、YJLY、YJV22、YJLV22、YJY23、YJLY23、YJV32、YJLV32、YJY33、YJLY33
|
|
Core number
|
Single core
|
Double core
|
3-5core
|
|
Laying
|
In the air
|
In soil
|
In the air
|
In soil
|
In the air
|
In soil
|
|
Single core cable arrangement
|
|
|
|
|
|
Conductor material
|
Cu
|
AI
|
Cu
|
AI
|
Cu
|
AI
|
Cu
|
AI
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
AI
|
Cu
|
AI
|
|
Nominal cross section（mm2）
|
1.5
2.5
|
22
30
|
---
---
|
30
40
|
---
---
|
40
50
|
---
---
|
43
57
|
---
---
|
2533
|
---
---
|
36
47
|
---
---
|
21
28
|
---
---
|
25
33
|
---
---
|
|
4
6
|
39
50
|
---
---
|
53
67
|
---
---
|
71
91
|
---
---
|
74
94
|
---
---
|
44
55
|
---
---
|
63
78
|
---
---
|
37
46
|
---
---
|
44
54
|
---
---
|
|
10
16
|
70
94
|
53
76
|
93
124
|
71
102
|
123
158
|
95
122
|
127
163
|
97
131
|
77
101
|
48
82
|
105
135
|
80
112
|
63
84
|
48
65
|
73
94
|
56
72
|
|
25
35
|
124
154
|
99
118
|
168
207
|
130
160
|
201
244
|
159
191
|
213
258
|
165
199
|
140
173
|
106
130
|
189
217
|
139
169
|
109
132
|
85
102
|
120
144
|
93
111
|
|
50
70
|
191
241
|
150
185
|
252
306
|
195
239
|
292
355
|
224
283
|
304
372
|
235
289
|
218
264
|
150
191
|
258
315
|
198
246
|
159
195
|
123
152
|
159
205
|
131
159
|
|
95
120
|
297
346
|
231
268
|
384
439
|
298
340
|
433
496
|
338
387
|
449
512
|
348
398
|
331
379
|
256
293
|
377
422
|
293
334
|
237
273
|
184
213
|
240
278
|
190
210
|
|
150
185
|
399
455
|
308
365
|
507
591
|
392
459
|
554
624
|
430
490
|
575
650
|
445
505
|
439
498
|
336
388
|
482
540
|
372
422
|
310
355
|
241
277
|
309
347
|
240
271
|
|
240
300
|
552
652
|
427
502
|
694
810
|
539
629
|
725
819
|
568
639
|
757
855
|
589
664
|
---
---
|
---
---
|
---
---
|
---
---
|
416
473
|
326
372
|
399
446
|
312
351
|
|
400
500
|
777
921
|
590
687
|
937
1078
|
731
845
|
934
1061
|
701
898
|
976
1110
|
762
870
|
---
---
|
---
---
|
---
---
|
---
---
|
---
---
|
---
---
|
---
---
|
---
---
|
|
Ambient temperature（℃）
|
40
|
25
|
40
|
25
|
40
|
25
|
|
6/6（6/10）kV XLPE insulated power cable
|
Rated voltage U/U
|
6／6（6／10）kV
|
|
Model
|
YJV、YJLV、YJY、YJLY
|
YJV、YJLV、YJY、YJLY、YJV22、YJLV22、YJY23、YJLY23、YJV32、YJLV32、YJY33、YJLY33
|
|
Core number
|
Single core
|
Three core
|
|
Laying
|
In the air
|
In soil
|
In the air
|
In soil
|
|
Single core cable arrangement
|
|
OOO
|
|
OOO
|
|
Conductor material
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
A1
|
Cu
|
A1
|
Cu
|
A1
|
Cu
|
Al
|
|
Nominal cross section （mm2）
|
25
35
|
140
170
|
110
135
|
165
205
|
130
155
|
150
180
|
115
135
|
160
190
|
120
145
|
120
140
|
90
110
|
125
155
|
100
120
|
|
50
70
|
205
260
|
160
200
|
245
305
|
190
235
|
215
265
|
160
200
|
225
275
|
175
215
|
165
210
|
130
165
|
180
220
|
140
170
|
|
95
120
|
315
360
|
247
280
|
370
430
|
290
335
|
315
360
|
240
270
|
330
375
|
255
290
|
255
290
|
200
225
|
265
300
|
210
235
|
|
150
185
|
410
470
|
328
365
|
490
560
|
380
435
|
405
455
|
305
345
|
425
480
|
330
370
|
330
375
|
255
295
|
340
380
|
260
300
|
|
240
300
|
555
640
|
435
500
|
665
765
|
515
595
|
530
595
|
400
455
|
555
630
|
435
490
|
435
495
|
345
390
|
435
485
|
345
390
|
|
400
500
|
745
815
|
585
680
|
890
1030
|
695
810
|
680
765
|
520
595
|
725
825
|
565
650
|
565
---
|
450
---
|
520
---
|
440
---
|
|
Ambient temperature（℃）
|
40
|
25
|
40
|
25
|
8.7/10（8.7/15）KV XLPE insulated power cables are laid in air for long term continuous load, allowing ampacity
|
8.7/10（8.7/15）KV XLPE insulated power cable
|
Rated voltage
U/U
|
8.7／10（8.7／15）tv
|
|
Model
|
YJV、YJLV、YJY、YJLY
|
YJV、YJLV、YJY、YJLY、YJV22、YJLV22、YJY23、YJLY23、YJV32、YJLV32、YJY33、YJLY33
|
|
Core number
|
Single core
|
Three core
|
|
Laying
|
In the air
|
In soil
|
In the air
|
In soil
|
|
Single core cable arrangement
|
|
000
|
|
000
|
|
Conductor material
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
A1
|
|
Nominal cross section（mm2）
|
25
35
|
140
170
|
110
135
|
165
205
|
130
155
|
150
180
|
115
135
|
160
190
|
120
141
|
120
140
|
90
110
|
125
115
|
100
120
|
|
50
70
|
205
260
|
160
200
|
245
305
|
190
235
|
215
265
|
160
200
|
225
275
|
175
215
|
165
210
|
130
165
|
180
220
|
140
170
|
|
95
120
|
315
360
|
247
280
|
370
430
|
290
335
|
315
360
|
240
270
|
330
375
|
255
290
|
255
290
|
200
225
|
265
300
|
210
235
|
|
150
185
|
410
470
|
328
365
|
490
560
|
380
435
|
405
455
|
301
345
|
425
480
|
330
370
|
330
375
|
255
295
|
340
380
|
260
300
|
|
240
300
|
555
640
|
435
500
|
665
765
|
515
595
|
530
595
|
400
455
|
555
630
|
435
490
|
435
495
|
345
390
|
435
485
|
345
390
|
|
400
500
|
745
855
|
585
680
|
890
1030
|
695
810
|
680
765
|
520
595
|
725
825
|
565
650
|
565
---
|
450
---
|
520
---
|
440
---
|
|
Ambient temperature（℃）
|
40
|
25
|
40
|
25
|
26/35KV XLPE insulated power cables are laid in air for long term continuous load, allowing ampacity
|
26/35KV XLPE insulated power cable
|
Rated voltage
U/U
|
26／35kV
|
|
Model
|
YJV、YJLV、YJY、YJLY
|
YJV、YJLV、YJY、YJLY、YJV22、YJLV22、YJY23、YJLY23、YJV32、YJLV32、YJY33、YJLY33
|
|
Core number
|
Single core
|
Three core
|
|
Laying
|
In the air
|
In soil
|
In the air
|
In soil
|
|
Single core cable arrangement
|
|
ooo
|
|
ooo
|
|
Conductor material
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
Al
|
Cu
|
Al
|
|
Nominal cross section （mm2）
|
50
70
|
220
270
|
170
210
|
245
305
|
190
235
|
215
265
|
165
200
|
225
275
|
175
215
|
185
230
|
145
190
|
200
250
|
170
190
|
|
95
120
|
330
375
|
255
290
|
370
425
|
285
330
|
315
360
|
240
270
|
330
375
|
255
290
|
280
310
|
215
240
|
300
330
|
230
255
|
|
150
185
|
425
485
|
330
380
|
485
555
|
375
430
|
400
455
|
305
345
|
420
475
|
325
370
|
360
400
|
280
310
|
380
425
|
295
330
|
|
240
300
|
560
650
|
435
510
|
650
745
|
505
580
|
525
595
|
400
455
|
555
630
|
430
490
|
470
540
|
365
430
|
490
555
|
380
435
|
|
400
500
|
760
875
|
595
690
|
870
1020
|
680
790
|
680
775
|
525
600
|
720
825
|
565
645
|
610
---
|
485
---
|
625
---
|
500
---
|
|
630
|
1000
|
800
|
1160
|
920
|
875
|
685
|
940
|
740
|
---
|
---
|
---
|
---
|
|
Ambient temperature（℃）
|
40
|
25
|
40
|
25
|
Current rated voltage 0.6/1kV PVC insulated power cables are laid in air for long term continuous load, allowing current carrying capacity
|
Rated voltage 0.6/1kV PVC insulated power cable
7.1.1 cable laying temperature more than 0 DEG C
Allowed working temperature of cable conductor: 7.1.2 is not higher than 70 DEG
7.1.3 7.1.3 short-circuit (the longest duration is more than 5S) the maximum working temperature of the cable: 160 degrees centigrade
7.1.4 cable allows minimum bending radius R=15D. (D is the actual external diameter of the cable)
7.1.5 cable shall be subjected to DC voltage 3500V/5min without breakdown.
7.1.6 laying in air
A. single core cable parallel laying of the center distance: 185mm2 and below for the cable diameter of 2 times; 240mm2 and above is 90mm.
B. ambient temperature: 30 C.
C. correction factor for download flow at different ambient temperatures:
|
Ambient temperature（℃）In the air
|
20
|
25
|
30
|
35
|
40
|
45
|
|
Correction factor
|
1.12
|
1.06
|
1.00
|
0.94
|
0.87
|
0.79
|
Correction factor 7.1.7 directly buried laying
When the A. single core cable is not in contact with the cable, the center distance is 2 times of the cable diameter.
B. ambient temperature: 25 C.
C. soil thermal resistance coefficient: 10.M/W
D. buried depth: 0.7m
E. correction factor of download flow at different environmental temperatures:
|
Ambient temperature（℃）In soil
|
15
|
20
|
25
|
30
|
35
|
|
Correction factor
|
1.11
|
1.05
|
1.00
|
0.94
|
0.88
|
Rated voltage 26/35 (26/45) kV and below. XLPE insulated power cables are laid in air, allowing current carrying capacity under long-term continuous load
|
XLPE insulated power cables rated voltage 26/35 (26/45) kV and below
1 cable laying temperature more than 0 DEG C
Allowed working temperature of cable conductor 2: less than 90 DEG C
3 short circuit (the longest duration is more than 5S) the maximum working temperature of the cable: 250 degrees centigrade
4 cable allows minimum bending radius R=15D. (D is the actual external diameter of the cable)
5 lay in the air
A. single core cable parallel laying of the center distance: 185mm2 and below for the cable diameter of 2 times; 240mm2 and above is 90mm.
B. ambient temperature: 40 C.
C. correction factor for download flow at different ambient temperatures:
Direct buried laying
When the A. single core cable is not in contact with the cable, the center distance is 2 times of the cable diameter.
B. ambient temperature: 25 C.
C. soil thermal resistance coefficient: 10.M/W
D. buried depth: 0.7m
E. correction factor of download flow at different environmental temperatures:
|
The operating temperature of the conductor is90（℃）
|
Soil temperature（℃）
|
|
10
|
15
|
20
|
25
|
30
|
35
|
40
|
45
|
|
Correction factor
|
1.11
|
1.07
|
1.04
|
1.00
|
0.96
|
0.92
|
0.87
|
0.83
|
|
The operating temperature of the conductor is90（℃）
|
Air temperature（℃）
|
|
10
|
15
|
20
|
25
|
30
|
35
|
40
|
45
|
50
|
|
Correction factor
|
1.26
|
1.22
|
1.18
|
1.14
|
1.09
|
1.04
|
1.0
|
0.94
|
0.89
|
|
|
|
|
|
|
|
|