VVG, VVGng(A) at 6 kV

CONSTRUCTION: 

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

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

3. Inner sheath (for cables with round conductors) from 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 polyethylene terephthalate film. 

7. Outer sheath – from PVC compound. 

For cable VVGng(A)– inner and outer sheath insulation from low fire performance PVC compound. 

Power cables with copper conductors, insulation and sheath from PVC compound VVG, VVGng(A) used for transmission and distribution of electric energy in stationary units at nominal alternating voltage 6 kV, nominal frequency 50 Hz. 

Maximum voltage of three-phase network cable -7,2 kV Cable designed for single cable line laying in cable structures and outer (open) electric units (cable tray system, galleries). 

Bunched laying of such cables necessary to use fireproof equipment. 

Cable VVGng(A) used for bunched laying in cable structures and outer (open) electric units (cable tray system, galleries). Cable VVG designed for laying in trenches without limitation of level differences. 

Fire hazard grade for cable VVG acc.to GOST 31565: O.1.8.2.5.4 

Fire hazard grade for cable VVGng(A) acc. to GOST 31565: P16.8.2.5.4.

Type of climatic category acc. to GOST 15150: UXL, placement category 1-5. 
Cables VVG are flame-retardant at single laying.
Cables VVGng(A) are flame-retardant at bunched laying. Range of operating temperatures: from -500C up to +500C.
Relative atmosphere humidity at temperature up to +350C: up to 98% Cable laying and assembly without preheating at temperature not less: -150C.
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.