KOGRESH

1. Electric conductor – copper multiwire, round shape acc.to grade 5, GOST 22483. 

2. Main and additional conductors have insulation from conductive rubber RTI-1 based on natural and butadiene. Main and additional insulated conductors have solid distinct colouring. 

3. Main and additional conductor shields – from electrically conductive rubber RE-2. 

4. Ground conductor – copper conductor sheath from rubber REM-1. 

5. Hardening core conductor – from polyester thread and rubber REM-1. 

6. Additional conductor. As distributing layer before sheath laying use talc. 

7. Sheath – from flame-retardant, wear and oil-resistant rubber

Extra flexible, shielded power cables KOGRESH used for connection of mine drilling electric equipment with nominal alternating current voltage, frequency 50 Hz to the insulated neutral. 

Cables used for operation in underground premises and mines with high humid level, where possible continuous water presence or often moisture condensation. 

Electric shields on conductor insulation have preventive shut off of electric power supply system in case of cable damage as well as possible explosion of methane gas in mines. 

Alternating current test voltage frequency 50Hz, 5 min: 2,5 kV 

Maximum operating temperature of conductor: 750C. 

Nominal alternating current frequency 50 Hz, 0,66 kV Cable length, not less than 150 m. 

Electrical insulation resistance of main conductors at 200C not less than 50 Mom/km 

Electrical resistance of conductive shields at temperature 200C not more than 1000 Mom/km.

Cables with U application used for operation at ambient temperatures from – 30 up to +550C, T application from -10 up to +550C. 

Cables resistant to multiple bends for angle ±1 rad at elongation stress 49 N, as well as resistant to axial rotating for angle ±2 rad on the length 1 m and load 49 N. 

Number of bend cycles and axial rotating: for cables with main conductor section 1,5 mm2 – 35 000, 2,5 mm2 - 28 000, 4,0 mm2 and 6,0 mm2 – 22 000. 

Cables resistant to tension force not more than 19,6 N for 1 mm2 of total conductor section. 

Cables in tropical application resistant to mold damage. 

Cables are flame-retardant at single laying. 

Type of climatic application: U and T, placement category 5 acc. to GOST 15150-69 

Minimum bending radius at laying and assembly not less: 3 cable diameters 

Life period of the cable: not less than 2 years 

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