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KUSIL power cable
manufactured acc. to ТУ 3500-013-76960731-2008

KUSIL cables are designed for transmission and distribution of electric power in stationary equipment, as well as for installation of power and control circuits, alarms, and lighting with rated AC voltages of 0.66; 1 and 3 kV and nominal frequency of 50 Hz. Cables meet all the requirements of GOST R 53769-2010 "Power cables with plastic insulation for rated voltage of 0.66; 1 and 3 kV. OTU" and IEC 60502-1:2004 international standard for power cables.

The cables can be installed both indoors and outdoors, in channels, tunnels, underground (cable trenches), and places exposed to stray currents. "УФ" marked cables are UV-resistant cables that can be installed in the open air with no additional protection from solar radiation. The cables can be used in 0, 1, and 2 explosive hazardous zones (regarding the requirements of IEC 60079-14-2008) and nuclear power plant safety systems.

Cable design features, materials and types

  • Cables meet all the requirements of IEC 60502-1:2004 international standard and GOST R 53769-2010 "Power cables with plastic insulation for rated voltage of 0.66; 1 and 3 kV. OTU"
  • "Пс" xLPE cable withstands high-frequency current and short-circuit current of long duration
  • Cable conductors are provided with individual and collective shield
  • Cables have got round cross-section
  • Cross-section varying from 1,0 mm² to 500mm² ,and a number of conductors varying from 1 to 61
  • Cable marked with "FR" index is a fire-resistant cable
  • New materials are applied to provide the best fire safety characteristics for "нг(A)-LS" and "нг(A)-HF" cable
  • Cable marked with special "M" index is resistant to oil-and-petrol
  • Cable marked with "УФ" index is resistant to solar radiation
  • Cable moisture protection technology is applied
  • Wide range of applications, including all explosive hazardous areas
  • Wide operating temperature range varying from -60° to +200°C
  • Combined cable option - copper wires and optical fibers put together in a single cable

KUSIL cables are designed according to GOST 22483-77 (Table 3.4) and may include 1 or 2 class single or stranded conductor. All single-core cables and multi-core cables with nominal cross-section of up to 16 mm² (cables with cross-section of up to 50mm² may also be included) have round conductors. Double-core cables with cross-section of 25 mm² and more have segment-shaped conductors, while 3, 4 and 5-core cables have sector-shaped conductors. 4-core cables with a nominal cross-section of 6mm² or more may also have a smaller conductor (earth or neutral conductor) according to Table 5.

All conductors have numeral or colour marking. The insulation colour of multi-core cables is specified in Table 6. The insulation of single-core cables may be of any colour. Earth conductors (PE) are green-yellow, neutral conductors (N) are blue (cyan). The cable comes with a black sheath in case you did not specify a different sheath colour when ordering.

Cables that are marked with "B" material index are made of flexible PVC. "нг(A)" material index is put on cables made of flame-resistant PVC composition, while the "нг(A)-LS" material index means the cable has a flame-retardant low-smoke sheath. Cables marked with "П" material index are made of polymer compositions that are halogens free ("нг(A)-HF"). Those cable insulations marked with "Пс" material index are made of xLPE, letting the cable to withstand high load currents and have better insulation properties. Cables marked with "T" material index have insulation and sheath made of thermoplastic elastomer, so these cables have got an increased durability and extended range of operating temperature. We also manufacture fire resistant ("FR") cables.

A shared shield made of copper tape and/or a copper wire braid for each separate core can be applied to any cable, or it may no shield applied at all. A water swelling tape is applied over the cable core in order to prevent the longitudinal moisture propagation. Armoured cables have got galvanized steel tapes ("Б") or galvanized wires ("К"), which form an armour layer right under the cable’s outer sheath.

All cables have a round cross-section and an extruded-substrate, making them fully compatible with requirements of art.9.3.1 IEC 60079-14-2008 and applicable in explosive hazardous zones.

Fire-resistant cable ("нг(A)-FR", "нг(A)-FRLS" and "нг(A)-FRHF" indexes)

Conductor of fire-resistant cables ("нг(A)-FR", "нг(A)-FRLS" and "нг(A)-FRHF" indexes) is covered with two additional layers of mica tape under an insulation. Cable maintains working efficiency for at least 90 minutes even if being exposed to an open fire and a minimum temperature of +750° C. This feature will help to avoid the emergency power cut-off in case of a fire. Fire-resistant cable requirements for alarm, emergency lighting, and smoke exhaust systems, as well as for fire pumps and elevators circuits, etc. are described in GOST R 53315-2009 and "Technical Regulations for Fire Safety Requirements" of 22 July 2008. No. 123-F3.

Manufacture of customised cable

  • with conductors of 3, 4 or 5 flexibility class, meeting the requirements of GOST 22483-77;
  • any combination of conductor insulation colours;
  • with coloured outer sheath (red, yellow or any other colour);
  • with combined cross-section of conductors;
  • with tinned copper wire shield;
  • fire-resistant cables that maintain their working efficiency for at least 180 minutes even if being exposed to an open fire and a temperature of up to +1100° C;
  • combined cable - single cable simultaneously transmits electrical energy (through electric conductor) and optical signals (through optical fiber).

Cable marking when ordering:

КУСИЛ x
1 2 3 4 5 6 7 8 9 10 11
  1. Fire safety index (see Table 1) (2)
  2. Number of conductors 1..61 (see Table 3)
  3. Conductor type and cross-section: (3), (4)
    solid conductor (Table 4) 1,0..50 mm²
    stranded conductor (Table 4) 1,0..500 mm²
    • "ок" - solid round conductor
    • "мк" - stranded rounded conductor
    • "ос" - solid sector- or segment-shaped conductor
    • "мс" - stranded sector- or segment-shaped conductor
  4. "(л)" - tinned copper conductor (1)
  5. "Э" - individual CWB shield (1)
  6. Cable insulation and sheath material (see Table1):
    • "В" - PVC
    • "П" - polymeric composition
    • "Пс" - xLPE
    • "Т" - TPE
  7. "Э" - copper tape or copper foil collective shield (1), (5)
  8. Cable armour: (1)
    • "Б" - galvanized steel strips
    • "К" - galvanized wires
  9. Special cable indexes: (1)
    • "ХЛ" - cold-resistant (for "нг(A)" cable marked with "В" material index only)
    • "УФ" - resistant to solar radiation (for "нг(A)-HF" cable or cable marked with "Т" material index only)
    • "Т" - TPE with operation temperature of up to +200°С
    • "М" - oil-and-petrol resistant sheath (for "нг(A)-HF" cable or cable marked with "Т" material index only)
  10. Rated voltage:
    • "-0,66" - 0,66 kV
    • "-1" - 1 kV
    • "-3" - 3 kV
  11. Optical fiber (combined cable) (1)
    - see ГЕРДА-КОУ leaflet for order details

(1) - optional field
(2) - "A" category may be specified in brackets right after "нг(A)" index when marking a group cable laying
(e.g. КУСИЛ нг(A)-LS 5х10ок ВБ - 0,66)
(3) - Nominal conductor cross-section list:
1; 1,5; 2,5; 4; 6; 10; 16; 25; 35; 50; 70; 95; 120; 150; 185; 240; 300; 400; 500 mm²
(4) - Those cables having earth or neutral conductor included should have a corresponding additional "PE" or "N" index put right after the conductor cross-section number
(e.g. КУСИЛ нг(A) 3х120мс + 1х70мс(N) ВБ - 1)
(5) - Common screen is required for any unarmoured cable with rated voltage of 3 kV

An example of cable marking when ordering

Сable КУСИЛ 3х25ок В - 0,66 ТУ 3500-013-76960731-2008
- the cable consists of three solid round-shaped conductors with a nominal cross-section of 25 mm², with PVC insulation and sheath applied, and is designed for rated voltage of 0,66 kV;

Сable КУСИЛ FR-LS 4х70мс ВЭ - 1 ТУ 3500-013-76960731-2008
- the cable consists of four stranded sector-shaped conductors with a nominal cross-section of 70 mm², with flame retardant and low smoke PVC insulation and sheath applied, includes copper tape collective shield layer, and is designed for rated voltage of 1 kV;

Сable КУСИЛ FR-FRHF 5х95мс П-М - 1 ТУ 3500-013-76960731-2008
- the cable is fire-resistant and consists of five stranded sector-shaped conductors with a nominal cross-section of 95 mm², with insulation and sheath made of halogen-free polymeric composition, and is designed for rated voltage of 1 kV. Cable sheath is oil-and-petrol resistant.

Table 1. Insulation and sheath material, cable fire safety index

Insulation and sheath material

Fire safety index

Cable type (according to GOST R 53315-2009 Fire Safety Requirements)

Marking example

В

(without index)

flame retardant cable if single cable laying is applicable

КУСИЛ 3x25ок В - 0,66

нг(A)

flame retardant cable if group cable laying is applicable

КУСИЛ нг(A) 3x120мс+1x70мс(N) ВБ - 1

нг(A)-LS

flame retardant and low smoke cable if group cable laying is applicable

КУСИЛ нг(A)-LS 5x10ок ВБ - 0,66

нг(A)-FRLS

flame retardant, fire-resistant and low smoke cable if group cable laying is applicable

КУСИЛ нг(A)-FRLS 4x70мс В -1

П

нг(A)-HF

flame retardant and halogen-free cable if group cable laying is applicable (no corrosive gaseous products are emitted under combustion or smouldering)

КУСИЛ нг(A)-HF 4x50мс П-УФ-1

нг(A)-FRHF

flame retardant, fire-resistant and halogen-free cable if group cable laying is applicable (no corrosive gaseous products are emitted under combustion or smouldering)

КУСИЛ нг(A)-FRHF 5x95мс П - 1

Пс

нг(A)-LS

flame retardant and low smoke cable if group cable laying is applicable

КУСИЛ нг(A)-LS 4x70мс Пс - 1

нг(A)-FRLS

flame retardant, fire-resistant and low smoke cable if group cable laying is applicable

КУСИЛ нг(A)-FRLS 5x95мс Пс - 1

нг(A)-HF

flame retardant and halogen-free cable if group cable laying is applicable (no corrosive gaseous products are emitted under combustion or smouldering)

КУСИЛ нг(A)-HF 4x185мс Пс-УФ - 1

нг(A)-FRHF

flame retardant, fire-resistant and halogen-free cable if group cable laying is applicable (no corrosive gaseous products are emitted under combustion or smouldering)

КУСИЛ нг(A)-FRHF 5x95мс Пс - 1

Т

нг(A)

flame retardant cable if group cable laying is applicable

КУСИЛ нг(A) 5x2,5ок ТЭ - 0,66

нг(A)-FR

flame retardant and fire-resistant cable if group cable laying is applicable

КУСИЛ нг(A)-FR 4x70мс Т -Т -1

Cable characteristics

Table 2. Cable technical data

Operating temperature

- from -50° to +70°C

- from -60° to +70°C for cables marked with "xL" index

- from -60° to +125°C for cables marked with "T" material index

- from -40° to +200°C for cables marked with "T-T" material index

Minimum cable installation temperature

- equal to or higher than -15°С

- equal to or higher than -30°С for cables marked with "xL" and "Т" index

Rated voltage

AC with a frequency of up to 50 Hz

0,66 kV; 1 kV; 3 kV

DC resistance of conductors

Meets the requirements of GOST 22483-77 standard

Insulation resistance during operation,
t = +20°C

- 10 MW·km or more for cables marked with "PVC", and "P" material index

- 50 MW·km or more for cables marked with "T" material index

- 150 MW·km or more for cables marked with "xLPS" material index

Climatic category

CR and PVC, with the categories of placement 1 and 5 (according to GOST 15150-69 standard). The cables can be used in any climatic region, including tropics.

Resistance to longitudinal moisture propagation in case of cable damage

Water and moisture is completely blocked

Cable bending radius
(D -outside diameter of cable)

- 10 D or more for single-core cables

- 7,5 D or more for multi-core cables

Resistance to fungi mold

Mold resistance factor - up to 2

Fire-resistance
(for "FR" cables)

can be exposed to an open fire and a temperature of +750° C and higher for at least 90 minutes

Cable service life

- no less than 30 years

- no less than 25 years for cables marked with "T" material index

Nominal conductor cross-section

Table 3. Nominal cross-section of conductor depending on the number of cable conductors and cable rated voltage

Number of conductors

Rated voltage, kV

0,66

1

3

Nominal conductor cross-section, mm²

1

1,0 - 50

1,0 - 500

10 - 500

2 - 5

1,0 - 240

10 - 240

4 - 61

1,0 - 6

-

-
Table 4. Nominal cross-section of conductor depending on the conductor size and type

Conductor type

Nominal conductor
cross-section, mm²

round-shaped

sector-shaped (segment-shaped)

Solid

1,0-50

-

Stranded

1,0-500

25-240
Table 5. Nominal cross-section of neutral conductor (N) and earth conductor (PE) for four-conductor cable

Conductor

Nominal conductor cross-section area, mm²

Main

10

16

25

35

50

70

95

120

150

185

240

Neutral (N) or Earth (PE)

6

10

16

16

25

35

50

70

70

95

120
Table 6. Conductor insulation colour for stranded conductor cable

Number of conductors, pcs.

Conductor insulation colour

Conductor sequence number

1

2

3

4

5

2

grey*

blue

-

-

-

3

grey *

brown

black

-

-

grey *

blue

green-yellow

-

-

4

grey *

brown

black

blue

-

grey *

brown

black

green-yellow **

-

5

grey *

brown

black

blue

green-yellow

* - or natural coloured; ** - agreed with a customer

Cable electrical specification

Table 7. Cable current carrying capacity

Nominal conductor cross-section area, mm²

Current carrying capacity, A
cables with insulation and sheath material index applied "В", "П", "Т" / "Пс"

Short-circuit carrying capacity (calculated for one second duration), kA***

solid conductor

stranded conductor**

for "В", "П", "Т" cable types

for "Пс" cable type, and all types of "FR" cable

direct current

alternating current*

alternating current

open air

underground

open air

underground

open air

underground

1

17 / 20

24 / 27

14 / 17

18 / 20

13 / 15

16 / 18

0,11

0,14

1,5

29 / 35

41 / 48

22 / 28

30 / 33

21 / 25

27 / 31

0,17

0,21

2,5

37 / 46

55 / 63

30 / 36

39 / 42

27 / 34

36 / 40

0,27

0,34

4

50 / 60

71 / 82

39 / 47

50 / 54

36 / 45

47 / 52

0,43

0,54

6

63 / 76

90 / 102

50 / 59

62 / 67

46 / 56

59 / 64

0,65

0,81

10

86 / 105

124 / 136

68 / 82

83 / 89

63 / 78

79 / 86

1,09

1,36

16

113 / 139

159 / 175

89 / 108

107 / 115

84 / 104

102 / 112

1,74

2,16

25

153 / 188

207 / 228

121 / 146

137 / 147

112 / 141

133 / 144

2,78

3,46

35

187 / 230

249 / 274

147 / 180

163 / 176

137 / 172

158 / 173

3,86

4,8

50

227 / 281

295 / 325

179 / 220

194 / 208

167 / 209

187 / 205

5,23

6,5

70

286 / 356

364 / 399

226 / 279

237 / 255

211 / 265

231 / 253

7,54

9,38

95

354 / 440

436 / 478

280 / 345

285 / 306

261 / 327

279 / 304

10,48

13,03

120

413 / 514

499 / 546

326 / 403

324 / 348

302 / 381

317 / 347

13,21

16,43

150

473 / 591

561 / 614

373 / 464

364 / 392

346 / 437

358 / 391

16,3

20,26

185

547 / 685

637 / 695

431 / 538

442 / 443

397 / 504

405 / 442

20,39

25,35

240

655 / 812

743 / 821

512 / 641

477 / 515

472 / 598

471 / 515

26,8

33,32

300

760 / 956

845 / 924

591 / 739

539 / 501

- / -

- / -

33,49

41,64

400

894 / 1124

971 / 1060

685 / 860

612 / 661

- / -

- / -

39,6

55,2

500

1054 / 1328

1121 / 1223

792 / 997

690 / 746

- / -

- / -

49,5

69

* - laying of cables in trefoil formation
** - value of current carrying capacity for four- and five- conductor cables should be multiplied by 0.93
*** - for short-circuit current duration that differs from 1 second, please, multiply the value from the table by K coefficient that is to be calculated by the following formula: K=1/√r , where r is short-circuit current duration (up to 5 seconds).