Three Core Cables To BS 6622

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Supplying you with customized three core cables to bs 6622, it is one of the reliable three core cables to bs 6622 manufacturers and suppliers, welcome to wholesale our products at good price from our factory.

Three Core Medium Power Cable to BS 6622

Application:

The three core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 3.6/6.6KV to 19/33KV and frequency 50Hz. They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations.

Standards:

BS 6622

Conductor:

Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper conductors shall be stranded (class 2) and aluminium conductors shall be either solid or stranded (class 2).

Conductor Screen:

Extruded layer of semi-conducting cross-linkable compound is applied over the conductor and shall cover the surface completely. The minimum thickness is 0.3mm and the maximum resistivity shall not exceed 500 Ohm-m at 90?

Insulation:

Insulation is of cross-linked polyethylene compound XLPE (GP8) conforming to BS 7655-1.3 or EPR (GP7), conforming to BS 7655-1.2.

Table 1. Insulation Thickness


     Nom. Cross Section Area

Insulation Thickness at Nom. Voltage

3.8/6.6KV(Um=7.2KV)

6.35/11KV(Um=12KV)

8.7/15KV(Um=17.5KV)

12.7/22KV(Um=24KV)

19/33KV(Um=36KV)

mm²

mm

mm

mm

mm

mm

70 – 185

2.5

3.4

4.5

5.5

8.0

240

2.6

3.4

4.5

5.5

8.0

300

2.8

3.4

4.5

5.5

8.0

400

3.0

3.4

4.5

5.5

8.0

Above 500

3.2

3.4

4.5

5.5

8.0

Insulaton Screen: Extruded layer of semi-conducting cross-linkable compound is applied over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating. As an option, a semi -conducting tape may be applied over the extruded semi-conducting layer as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site. Inner Covering & Fillers: For cables with a collective metallic layer or cables with a metallic layer over each individual cores with additional collective metallic layers, semi-conducting inner covering and fillers shall be applied over the laid up cores. The inner covering is made of non hygroscopic material, except if the cable is to be made longitudinally watertight. The inner covering shall be extruded or lapped. The approximate thickness of extruded inner coverings is given in Table 2:
Table 2. Approximate Thickness Of Extruded Inner Coverings

Ficititous Diameter Over Laid Up Cores

Approx. Thickress of Extruded Inner Covering

mm

mm

>

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35

45

1.0

25

35

1.2

35

45

1.4

45

60

1.6

60

80

1.8

80

-

2.0

*The approximate thickness of lapped inner coverings shall be 0.6mm.

Metallic Layer: The metallic layer shall be applied over each core or applied as a collective screen. The metallic screen shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires. The metallic layer provides an earth fault current path, capable of withstanding fault current to earth of 1000A for one second at maximum temperature 160°C. Copper wires are applied over the conducting water blocking layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum thickness of 0.1mm can be applied helically with overlap. Total cross section of copper wire screen is shown in table 3.

Table 3. Minimum Total Cross Section Of Copper Wire Screen & DC Resistance Of The Screen

Nominal Cross-Section Area of Cable

Minimum Cross-Section of Copper Wire Screen Area

DC Resistance of the Copper Wire Screen

mm²

mm²

mm

up to 120

16

1.06

150-300

25

0.72

400-630

35

0.51

Separation Sheath (for armoured cable): The separation sheath comprises a layer of extruded PVC, PE or LSZH. The nominal thickness is calculated by 0.02Du + 0.6mm where

Du is the fictitious diameter under the sheath in mm. The nominal separation sheath thickness shall not be less than 1.2mm. Armour (for armoured cable): The armour consists of galvanized steel wire applied over the inner covering with diameter specified as in Table 4.

Table 4. Armour Wire Diameter

Fictitiious Diameter Under the Armour

Armour Wire Diameter

mm

mm

>

<< p="">



25

1.6

25

35

2.0

35

60

2.5

60

-

3.15

Over Sheath: Overall sheath comprises a layer of extruded either PVC type 9 conforming to BS 7665-4.2 or MDPE type TS2 conforming to BS 7655-10.1; LSZH can be offered as an option. The oversheath is normally black in colour. When a DC voltage test is to be performed on the oversheath, a semi-conducting layer such as graphite coating shall be applied over the surface of the extruded oversheath. The nominal oversheath thickness is calculated by 0.035+D where D is the diameter immediately under the oversheath in mm. For cables with the oversheath not applied over the armour, the nominal oversheath thickness shall not be less than 1.4mm. And for cables with oversheath applied over the armour, the nominal oversheath thickness shall not be less than 1.8mm.
PHYSICAL PROPERTIES:
Operating Temperature: up to 90°C Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath ) Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds) Bending Radius: 15 x OD
Table 5. Nominal /Operating /Test Voltages

Rated Voltage Uo/U

Operating Voltage (Um)

Testing Voltage (rms)

3.8/6.6KV

7.2KV

15KV

6.35/11KV

12KV

25.5KV

8.7/15KV

17.5KV

35KV

12.7/22KV

24KV

51KV

19/33KV

36KV

76KV

hree Core 3.8/6.6KV (Um=7.2KV) Dimensional Data


 Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables

Nom.Insulation Thickness

Copper Tape Screen Area

Nom.Sheath Thickness

Approx. Overall Diameter

Approx. Weight

Copper Tape Screen Area

Nom.Bedding Thickness

Nom. Armour Wire Diameter

Nom.Sheath Thickness

Approx. Overall Diameter

Approx. Weight

CU

AL

CU

AL

mm2

mm

mm2

mm

mm

kg/km

mm2

mm

mm

mm

mm

kg / km

25

2.5

16

2.1

37.7

2205

1740

3.4

1.2

2.0

2.2

44.5

3890

3465

35

2.5

16

2.3

41.2

2690

2010

3.6

1.2

2.5

2.3

46.8

4420

3730

50

2.5

16

2.5

44.9

3340

2350

3.8

1.3

2.5

2.5

51.5

5640

4690

70

2.5

16

2.6

48.0

4050

2730

4.3

1.3

2.5

2.6

55.0

6570

5240

95

2.5

16

2.7

51.7

5000

3180

4.7

1.4

2.5

2.7

58.9

7760

5890

120

2.5

16

2.8

54.7

5890

3590

5.0

1.5

2.5

2.8

62.1

8810

6510

150

2.5

25

2.9

58.4

6960

4160

5.3

1.5

2.5

2.9

65.8

10110

7310

185

2.5

25

3.0

61.9

8160

4650

5.8

1.6

2.5

3.0

69.5

11520

7960

240

2.6

25

3.2

68.1

10210

5530

6.3

1.7

2.5

3.2

75.9

13920

9140

300

2.8

25

3.5

73.6

12380

6670

7.0

1.8

3.15

3.5

83.1

17400

11620

400

3.0

35

3.7

83.8

16190

8430

7.7

2.0

3.15

3.7

93.0

21900

13980

Electrical Data

Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables


Current Ratings

D C Resistance CU / AL

A C Resistance CU / AL

Short Circuit Rating of Conductor CU / AL 1 sec

Capaci- tance

Charging Current

Short Circuit Rating of Copper Wire Screen Per Core 1 sec

Short Circuit Rating of Copper Tape Screen Per Core 1 sec

Reac-tance

Induc- tance

Ground

Duct

Air

CU

AL

CU

AL

CU

AL

mm2

µO/m

µO/m

kA

pF/m

mA/m

kA

kA

µO/m

nH/m

A

A

A

25

727/1200

927/1538

3.6/2.3

272

0.33

2.6

0.4

113

370

140

115

125

95

145

115

35

524/868

668/1113

5.0/3.2

301

0.36

2.6

0.5

108

350

170

135

150

115

175

140

50

387/641

494/822

6.8/4.4

332

0.40

2.6

0.5

102

330

210

160

180

135

220

170

70

268/443

343/568

9.8/6.3

383

0.46

2.6

0.6

97

310

255

195

215

165

270

210

95

193/320

248/410

13.3/8.5

432

0.52

2.6

0.6

92

290

300

230

255

200

330

250

120

153/253

196/325

17.2/11.0

474

0.57

2.6

0.7

89

280

340

265

290

225

375

295

150

124/206

159/265

21.2/13.5

511

0.61

4.3

0.7

87

280

380

295

330

255

430

330

185

99.1/164

128/211

26.6/17.0

562

0.67

4.3

0.8

86

270

430

335

370

290

490

385

240

75.4/125

98/161

34.9/22.3

602

0.72

4.3

0.9

83

260

490

380

425

335

570

450

300

60.1/100

80/130

43.8/28.0

622

0.75

4.3

1.0

82

260

540

435

470

375

650

510

400

47.0/77.8

64/102

57.3/36.6

648

0.78

5.8

1.1

80

250

590

480

520

420

700

570

Three Core 6.35/11KV (Um=12KV) Dimensional Data


 Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables

Nom. Insulation Thickness

Copper Wire Screen Area

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

Copper Tape Screen Area

Nom. Bedding Thickness

Nom. Armour Wire Diameter

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

CU

AL

CU

AL

mm2

mm

mm2

mm

mm

kg/km

mm2

mm

mm

mm

mm

kg / km

25

3.4

16

2.3

42.8

2600

2120

3.8

1.3

2.5

2.4

50.0

4930

4400

35

3.4

16

2.3

45.3

3000

2320

4.1

1.3

2.5

2.5

52.3

5380

4700

50

3.4

16

2.4

48.5

3630

2690

4.4

1.4

2.5

2.6

55.7

6210

5260

70

3.4

16

2.5

52.0

4440

3110

4.7

1.4

2.5

2.7

59.2

7200

5870

95

3.4

16

2.7

56.0

5440

3620

5.2

1.5

2.5

2.8

63.2

8420

6550

120

3.4

16

2.8

59.4

6370

4020

5.5

1.6

2.5

3.0

67.0

9580

7190

150

3.4

25

2.9

62.7

7430

4630

5.8

1.6

2.5

3.1

70.3

10830

8030

185

3.4

25

3.0

66.1

8680

5150

6.2

1.7

2.5

3.2

73.9

12290

8720

240

3.4

25

3.1

71.7

10690

5990

6.8

1.8

3.15

3.4

81.2

15620

10790

300

3.4

25

3.3

76.4

12770

7050

7.3

1.9

3.15

3.6

86.1

18030

12240

400

3.4

35

3.5

85.1

16460

8680

8.0

2.0

3.15

3.8

95.0

22350

14350

Electrical Data


 Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables


Current Ratings

D C Resistance CU / AL

A C Resistance CU / AL

Short Circuit Rating of Conductor CU / AL 1 sec

Capaci- tance

Charging Current

Short Circuit Rating of Copper Wire Screen Per Core 1 sec

Short Circuit Rating of Copper Tape Screen Per Core 1 sec

Reac-tance

Induc-tance

Ground

Duct

Air

CU

AL

CU

AL

CU

AL

mm2

µO/m

µO/m

kA

pF/m

mA/m

kA

kA

µO/m

nH/m

A

A

A

25

727/1200

927/1538

3.6/2.3

216

0.43

2.6

0.5

123

390

140

115

125

95

145

115

35

524/868

668/1113

5.0/3.2

237

0.47

2.6

0.6

115

370

170

135

150

115

175

140

50

387/641

494/822

6.8/4.4

260

0.52

2.6

0.6

109

350

210

160

180

135

220

170

70

268/443

343/568

9.8/6.3

298

0.60

2.6

0.7

103

330

255

195

215

165

270

210

95

193/320

248/410

13.3/8.5

334

0.67

2.6

0.7

99

310

300

230

255

200

330

250

120

153/253

196/325

17.2/11.0

365

0.73

2.6

0.8

96

310

340

265

290

225

375

295

150

124/206

159/265

21.2/13.5

392

0.78

4.3

0.8

93

300

380

295

330

255

430

330

185

99.1/164

128/211

26.6/17.0

430

0.86

4.3

0.9

90

290

430

335

370

290

490

385

240

75.4/125

98/161

34.9/22.3

476

0.95

4.3

0.9

87

280

490

380

425

335

570

450

300

60.1/100

80/130

43.8/28.0

524

1.05

4.3

1.0

85

270

540

435

470

375

650

510

400

47.0/77.8

64/102

57.3/36.6

580

1.16

5.8

1.1

81

260

590

480

520

420

700

570

Three Core 8.7/15KV (Um=17.5KV) Dimensional Data

Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables

Nom. Insulation Thickness

Copper Wire Screen Area

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

Copper Tape Screen Area

Nom. Bedding Thickness

Nom. Armour Wire Diameter

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

CU

AL

CU

AL

mm2

mm

mm2

mm

mm

kg/km

mm2

mm

mm

mm

mm

kg / km

25

4.5

16

2.4

48.4

3000

2420

4.4

1.4

2.5

2.6

55.2

5600

5100

35

4.5

16

2.5

50.4

3450

2670

4.7

1.4

2.5

2.7

57.6

6130

5440

50

4.5

16

2.6

53.7

4140

3190

4.9

1.5

2.5

2.8

61.1

7010

6060

70

4.5

16

2.7

57.2

4980

3640

5.3

1.5

2.5

2.9

64.6

8030

6700

95

4.5

16

2.8

60.6

5900

4050

5.7

1.6

2.5

3.0

68.2

9160

7330

120

4.5

16

2.9

63.9

6870

4560

6.1

1.7

2.5

3.1

71.7

10340

8030

150

4.5

25

3.0

67.9

8030

5230

6.4

1.7

2.5

3.2

75.4

11730

8930

185

4.5

25

3.1

71.1

9310

5770

6.8

1.8

3.15

3.4

80.6

14170

10570

240

4.5

25

3.3

76.9

11390

6680

7.4

1.9

3.15

3.6

86.6

16670

11810

300

4.5

25

3.5

81.6

13510

7790

7.9

2.0

3.15

3.7

91.3

19140

13340

400

4.5

35

3.7

89.9

17130

9340

8.5

2.1

3.15

4.0

100.0

23360

15410

Electrical Data


 Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables


Current Ratings

D C Resistance CU / AL

A C Resistance CU / AL

Short Circuit Rating of Conductor CU / AL 1 sec

Capaci- tance

Charging Current

Short Circuit Rating of Copper Wire Screen Per Core 1 sec

Short Circuit Rating of Copper Tape Screen Per Core 1 sec

Reac- tance

Induc- tance

Ground

Duct

Air

CU

AL

Cu

Al

Cu

Al

mm2

µO/m

µO/m

kA

pF/m

mA/m

kA

kA

µO/m

nH/m

A

A

A

25

727/1200

927/1538

3.6/2.3

176

0.48

2.6

0.6

138

410

140

115

125

95

145

115

35

524/868

668/1113

5.0/3.2

193

0.53

2.6

0.6

123

390

170

135

150

115

175

140

50

387/641

494/822

6.8/4.4

211

0.58

2.6

0.7

116

370

210

160

180

135

220

170

70

268/443

343/568

9.8/6.3

240

0.65

2.6

0.7

110

350

255

195

215

165

270

210

95

193/320

248/410

13.3/8.5

267

0.73

2.6

0.8

105

330

300

230

255

200

330

250

120

153/253

196//325

17.2/11.0

291

0.79

2.6

0.8

102

320

340

265

290

225

375

295

150

124/206

159/265

21.2/13.5

312

0.85

4.3

0.9

98

310

380

300

330

255

430

330

185

99.1/164

128/211

26.6/17.0

340

0.93

4.3

0.9

95

300

430

335

370

290

490

385

240

75.4/125

98/161

34.9/22.3

375

1.02

4.3

1.0

91

290

490

380

425

335

570

450

300

60.1/100

80/130

43.8/28.0

411

1.12

4.3

1.1

89

280

540

435

470

375

650

510

400

47.0/77.8

64/102

57.3/36.6

454

1.24

5.8

1.2

84

270

590

480

520

420

700

570

Three Core 12.7/22KV (Um=24KV) Dimensional Data

Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables

Nom. Insulation Thickness

Copper Wire Screen Area

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

Copper Tape Screen Area

Nom. Bedding Thickness

Nom. Armour Wire Diameter

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

CU

AL

CU

AL

mm2

mm

mm2

mm

mm

kg/km

mm2

mm

mm

mm

mm

kg / km

35

5.5

16

2.7

51

3750

2880

5.2

1.5

2.5

2.8

62.3

6870

6140

50

5.5

16

2.8

54

4240

3250

5.4

1.5

2.5

2.9

65.6

7710

6810

70

5.5

16

2.9

58

5050

3650

5.9

1.6

2.5

3.0

69.0

8710

7370

95

5.5

16

3.0

62

6010

4110

6.2

1.7

2.5

3.2

73.1

10000

8130

120

5.5

16

3.1

65

6990

4660

6.6

1.7

3.15

3.3

77.7

12040

9730

150

5.5

25

3.2

68

8130

5330

6.9

1.8

3.15

3.4

81.7

13550

10750

185

5.5

25

3.3

72

9410

5870

7.4

1.9

3.15

3.6

85.5

15150

11610

240

5.5

25

3.5

79

11490

6880

7.8

2.0

3.15

3.7

91.3

17710

12840

300

5.5

25

3.7

84

13710

7890

8.2

2.0

3.15

3.9

96.0

20170

14360

400

5.5

35

3.9

91

17230

9440

9.0

2.2

3.15

4.1

104.8

24520

16480

Electrical Data


 Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables


Current Ratings

D C Resistance CU / AL

A C Resistance CU / AL

Short Circuit Rating of Conductor CU / AL 1 sec

Capaci- tance

Charging Current

Short Circuit Rating of Copper Wire Screen Per Core 1 sec

Short Circuit Rating of Copper Tape Screen Per Core 1 sec

Reac-tance

Induc- tance

Ground

Duct

Air

CU

AL

CU

AL

CU

AL

mm2

µO/m

µO/m

kA

pF/m

mA/m

kA

kA

µO/m

nH/m

A

A

A

35

524/868

668/1113

5.0/3.2

168

0.67

2.6

0.7

129

410

170

135

155

120

180

145

50

387/641

494/822

6.8/4.4

183

0.73

2.6

0.8

122

390

210

160

185

140

225

175

70

268/443

343/568

9.8/6.3

207

0.83

2.6

0.8

115

370

255

195

225

170

275

215

95

193/320

248/410

13.3/8.5

229

0.92

2.6

0.9

110

350

295

230

260

205

330

260

120

153/253

196/325

17.2/11.0

249

1.00

2.6

0.9

106

340

335

260

300

235

380

300

150

124/206

159/265

21.2/13.5

266

1.06

4.3

1.0

103

330

375

290

335

265

430

335

185

99.1/164

128/211

26.6/17.0

289

1.16

4.3

1.0

100

320

420

330

380

300

490

390

240

75.4/125

98/161

34.9/22.3

318

1.27

4.3

1.1

95

300

480

380

430

345

570

460

300

60.1/100

80/130

43.8/28.0

348

1.39

4.3

1.2

93

300

530

425

480

385

650

520

400

47.0/77.8

64/102

57.3/36.6

383

1.53

5.8

1.3

87

280

590

480

520

420

700

570

Three Core 19/33KV (Um=36KV) Dimensional Data


 Nom. Cross- Section Area


Unarmoured Cables

Steel Wire Armoured Cables

Nom.Insulation Thickness

Copper Wire Screen Area

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

Copper Tape Screen Area

Nom. Bedding Thickness

Nom. Armour Wire Diameter

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

CU

AL

CU

AL

mm2

mm

mm2

mm

mm

kg/km

mm2

mm

mm

mm

mm

kg / km

35

8.0

16

3.1

60

3750

2880

6.5

1.7

2.5

3.2

74.9

9460

8700

50

8.0

16

3.2

65

5240

4260

6.7

1.8

3.15

3.4

79.0

10620

9680

70

8.0

16

3.3

70

6120

4730

7.1

1.8

3.15

3.5

82.5

11840

10440

95

8.0

16

3.4

74

7140

5240

7.5

1.9

3.15

3.6

86.4

13200

11350

120

8.0

16

3.5

77

8080

5710

7.9

2.0

3.15

3.7

89.9

14520

12190

150

8.0

25

3.6

80

9120

6220

8.2

2.0

3.15

3.8

93.6

16070

13280

185

8.0

25

3.7

84

10440

6940

8.6

2.1

3.15

3.9

97.3

17710

14090

240

8.0

25

3.9

91

12620

8010

9.2

2.2

3.15

4.1

103.2

20370

15460

300

8.0

25

4.0

95

14690

8800

9.7

2.3

3.15

4.3

108.2

22980

17210

400

8.0

35

4.3

103

17720

10230

10.3

2.4

3.15

4.5

116.8

27480

19450

Electrical Data


 Nom. Cross- Section Area


Unarmored Cables

Aluminium Wire Armoured Cables


Current Ratings

D C Resistance CU / AL

A C Resistance CU / AL

Short Circuit Rating of Conductor CU / AL 1 sec

Capaci- tance

Charging Current

Short Circuit Rating of Copper Wire Screen Per Core 1 sec

Short Circuit Rating of Copper Tape Screen Per Core 1 sec

Reac- tance

Induc-tance

Ground

Duct

Air

CU

AL

CU

AL

CU

AL

mm2

µO/m

µO/m

kA

pF/m

mA/m

kA

kA

µO/m

nH/m

A

A

A

35

524/868

668/1113

5.0/3.2

132

0.79

2.6

0.9

140

460

170

135

155

120

180

145

50

387/641

494/822

6.8/4.4

142

0.85

2.6

1.0

134

430

210

160

185

140

225

175

70

268/443

343/568

9.8/6.3

159

0.95

2.6

1.0

127

400

255

195

225

170

275

215

95

193/320

248/410

13.3/8.5

175

1.05

2.6

1.1

121

390

295

230

260

205

330

260

120

153/253

196/325

17.2/11.0

189

1.13

2.6

1.1

117

370

335

260

300

235

380

300

150

124/206

159/265

21.2/13.5

201

1.21

4.3

1.2

113

360

375

290

335

265

430

335

185

99.1/164

128/211

26.6/17.0

217

1.30

4.3

1.2

109

350

420

330

380

300

490

390

240

75.4/125

98/161

34.9/22.3

237

1.42

4.3

1.3

104

330

480

380

430

345

570

460

300

60.1/100

80/130

43.8/28.0

258

1.55

4.3

1.4

101

320

530

425

480

385

650

520

400

47.0/77.8

64/102

57.3/36.6

282

1.69

5.8

1.5

96

290

590

480

520

420

700

570

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