VBVng(A)-LS at 6 kV

CONSTRUCTION: 

1. Electric conductor – copper multiwire, round or sectoral shape,2 grade acc.to GOST 22483. 

2. Insulation from low fire hazard PVC compound. Core – three insulated conductors of equal section twisted between each other. Inner сore interval from insulated conductors filled with harness, pressed from low fire hazard polyvinylchloride compound

3. Inner sheath (for cables with round conductors) from low fire hazard PVC compound laid with filling of spaces between insulated conductors. 

4. Conducting shield as winding from electrically conducting non-woven fabric. 

5. Metal shield from two copper bands. Metal shield nominal section: 16 mm2 for cables with conductor section (16-120) mm2 , 25 mm2 for cables with conductor section (150-240) mm2 

6. Separation layer as winding of glass film. 

7. Bedding under armour from low fire hazard PVC compound. 

8. Armour protection from two steel galvanized bands. 

9. Outer sheath – from low fire hazard PVC compound.

Power cables with copper conductors, insulation and sheath from low fire hazard PVC compound, armoured VBVng(A)-LS used for transmission and distribution of electric energy in stationary units at nominal voltage 6 kV, nominal frequency 50 Hz.

 Maximum voltage of three-phase network cable -7,2 kV Cables used for bunched laying of cable lines in cable structures and buildings inner (closed) electric units, for wiring in apartments and public buildings. 

Cables designed for laying in ground (trenches), except for collapsing soils. 

Cables designed for laying in trenches without limitation of level differences. Fire hazard grade acc. to GOST 31565: P16.8.2.2.2.

Type of climatic category acc. to GOST 15150: UXL, placement category 1 and 5. 

Cables are flame-retardant at bunched laying. 

Smoke emission at burning and smouldering of cables not decrease light transmission in test chamber more than 50%. 

Value of equivalent toxicity index of burning cables not more 40 g/m3 Range of operating temperatures: from -50 0C up to +500C. 

Relative atmosphere humidity at temperature up to +350C: up to 98% Cable laying and assembly without preheating at temperature not less: -15 0C. 

Admissible force at cable tension on the tray should not exceed 50 N/mm2 Cable conductor continuous heating temperature at work: +700C. Maximum allowable temperature of conductors heating at short current circuits: +1600C Short circuit duration should not exceed 5 sec. 

Admissible heating of cable conductors in emergency state: not more +800C. 

Operating period of cables in overload period should not exceed 8 hours per day and not more 1000 hours per life period. 

Maximum temperature of electric cable conductors without fire outbreak at short circuit – not more 3500C. 

Minimum bending radius at laying not less: 7,5 outer diameters. 

Life period: 30 years, according to stated transportation, storage, laying (assembly) and operation terms. 

Guaranteed operating period: 5 years from the date of putting cable into operation, but not later than 6 months from the production date.