КУСИЛ is a xPLE insulated power cable optimized for 10, 20, 35 kV voltages
manufactured acc. to ТУ 3500-024-76960731-2012

КУСИЛ cables are designed for transmission and distribution of electric power in stationary equipment with rated AC voltages of 10, 20, 35 kV and nominal frequency of 50 Hz for networks with grounded or insulated neutral. Cables meet all the requirements of international standard IEC 60502-2.

The cables are designed both for group and single cable laying in cable structures, sewers, industrial premises (including wet and often flooded locations), as well as for laying in the ground (including excessively wet soils), and water (non-navigable water). "УФ" marked cables are UV-resistant cables that can be installed outdoors without solar radiation protection. The cables can also be laid in cable raceways with no restrictions to level difference. The cables can be used in explosive hazardous zones regarding the requirements of IEC 60079-14-2008.

Cable design features, materials and types

• Cables meet all the requirements of inter-national standard IEC 60502-2
• Cables withstand high-frequency and short-circuit currents due to cross-linked polyethylene insulation
• Conductor cross-section varying from 35 mm² to 1000mm²
• Number of conductors: 1 or 3
• New materials are applied to provide the best fire safety characteristics ("нг(A)-LS" and "нг(A)-HF")
• Cable marked with "УФ" index is resistant to solar radiation
• Longitudinal, lateral, and conductor sealing technologies are applied to protect the cable against moisture ingress
• Wide range of applications in all explosive hazardous areas

TU 3500-024-76960731-2012 КУСИЛ cable product series include xLPE insulated single core and three core (Table 1) cables. Armor can be applied to three core cables only.

All conductors comply with Class 2 of GOST 22483-77 standard and may be compacted or stranded, of aluminum or copper.

Single core cables with nominal conductor cross-section of 35-1000 mm² are optimized for rated voltage of 10 kV, and those with nominal conductor cross-section of 50-1000 mm² are optimized for rated voltage of 20 kV and 35 kV, according to Table 1.

Three core cables that feature round-shaped conductors with nominal conductor cross-section of 35-300 mm², and those with sector-shaped conductors and nominal cross-section of 120-300 mm² are optimized for rated voltages of 10 kV, according to Table 1. Three core cables, which are optimized for rated voltages of 20 kV and 35 kV, feature round-shaped conductors with nominal conductor cross-section of 50-300 mm².

At the customer’s request a digit core marking can be printed on the three core cable conductor insulation shield surface.

All cables have a copper wire shield (Table 2) with a copper tape spirally applied over it.

Cables with longitudinal sealing ("г"), longitudinal and lateral sealing ("2г"), as well as those with conductor sealing ("ж"), can be applied for laying in the ground (excessively wet soils), and water (non-navigable water), as well as installed in wet and often flooded locations in case all the measures to prevent mechanical cable damage are followed. Reinforced cables ("у" - with longitudinal stiffeners) and armoured cables ("Б") are designed for laying in complex cable raceways that contain more than 4 turns at an angle of more than 30° or straight sections with more than four pipe transitions longer than 20m or more than two pipe transitions longer than 40m. Armoured cable ("Б") provides maximum conductor protection against external mechanical impacts due to galvanized steel tapes and additional sheath used in cable design.

The outer sheath of cables marked with "П" material index is made of polyethylene. These cables can be laid in the ground regardless of soil aggressiveness. The sheath of those cables marked with "B" material index is made of PVC plastic, which allows laying them in dry soils (sandy-clay soil and normal soil with moisture level of no more than 14%).

Cables with "нг(A)-LS" or "нг(A)(В)-LS" fire safety index have the outer sheath made of flame retardant and low smoke PVC. Cables marked with "нг(A)-HF" index have the outer sheath made of a halogen-free polymer composition, which means the cables do not emit corrosive gases when burning or smouldering. Cables with "нг(A)-LS", "нг(A)(В)-LS", and "нг(A)-HF" indexes can be used for group laying.

Cable marking when ordering:

1. Number of conductors: 1; 3
2. Nominal conductor cross-section (see Table 1)
3. "с" - sector-shaped conductor, for 10kV three core cables only (see Table 1) ⁽¹⁾
4. Copper shield cross-section (see Table 2)
5. Rated voltage: 10; 20; 35 kV
6. "А" - aluminium conductors (leave empty for copper conductors) ⁽¹⁾
7. xLPE conductor insulation
8. "Б" - galvanized steel tapes armour (for three core cables only) ⁽¹⁾
9. Sheath material:
   • "В" - PVC
   • "П" - polyethylene
10. "у" - reinforced polyethylene sheath with longitudinal stiffeners ^(1),(2),(3)
11. 11. Sheath sealing: ⁽¹⁾
    • "г" - longitudinal
    • "2г" - longitudinal and lateral
12. "ж" - longitudinal conductors sealing combined together with lateral sheath sealing "2г" ^(1),(2)
13. Fire safety index: ⁽¹⁾
    • "нг(A)-LS" - flame retardant (A category) and low smoke if group cable laying is applied ⁽⁴⁾
    • "нг(A)(В)-LS" - flame retardant (B category) and low smoke if group cable laying is applied ⁽⁴⁾
    • "нг(A)-HF" - flame retardant (A category) if group cable laying is applied; no corrosive gases emitted when burning or smouldering ⁽²⁾
14. Special cable indexes: ⁽¹⁾
    • "ХЛ" - cold-resistant (for PVC coated cables only)
    • "УФ" - resistant to solar radiation (for polyethylene coated cables only)

⁽¹⁾ - optional field
⁽²⁾ - for polyethylene (П) coated cables only
⁽³⁾ - for unarmoured cables only
⁽⁴⁾ - for PVC (В) coated cables only

An example of cable marking when ordering

Сable КУСИЛ 3х150/25-35 ПвПу2гж ТУ 3500-024-76960731-2012
- 35 kV power cable featuring longitudinal sealing of three round-shaped copper conductors with cross-section of 150 mm², including reinforced polyethylene sheath with lon-gitudinal and later sealing and copper shield with cross-section of 25 mm².

Cable characteristics

Cable admissible current

• Admissible overload currents are calculated as follows: when laid in the ground - multiply current values, represented in
• Table 5, by 1.17; when laid in the air multiply the values by 1.2
• Admissible currents for cables laid in pipes of more than 10m: for single core cables laid in separate pipes - multiply current values, represented in Table 5, by 0.94; for three single core cables laid in one pipe multiply the values by 0.9
• Admissible currents for several cables laid in the ground, including those laid in pipes, should be decreased through multiplying current values, represented in Table 5, by coefficients from Table 6
• Admissible one-second short-circuit currents in cable copper screens should not exceed the values represented in Table 7 and Table 8.
  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 as follows: K = 1 / √t , where t is short-circuit current duration.