What are the classification of cables (1)

1. Flame retardant rubber sheathed cable

a. Purpose

This product is a series of rubber cables used in mining. It is suitable for power connection of shearers and similar equipment with rated voltage Uo / U of 1.9 / 3.3KV and below. Mostly used in coal mines.

b.Conditions of use

The long-term allowable working temperature of the wire core is 65 ℃, and the minimum bending radius of the wire is 6 times the cable diameter. The yellow sheathed cable shall not be exposed to sunlight for a long time.

2.Nuclear grade cable

Scope of application

· This product is suitable for control and signal connection cables used in control system networks whose rated voltage Uo / U is 0.6 / 1kV for nuclear power plants.
· The long-term working temperature of the cable conductor is 90 ℃. The maximum temperature of the cable conductor during short circuit does not exceed 250 ℃ and the duration does not exceed 5 seconds.
· The ambient temperature when laying the cable should not be lower than 0 ℃.
· The bending radius allowed when laying the cable is:
— Cables without armor shall not be less than 6 times the cable diameter
— Cables with armor or copper tape shielding results should not be less than 12 times the cable diameter
— Flexible cables with shielding structure should not be less than 6 times the cable diameter.
· When the conductor's long-term allowable working temperature is not greater than 90 ℃, the identification life of the cable is not less than 40 years.
· Finished cable should meet the requirements of Class A bunched combustion test specified in GB / T18380.3 standard.
· Finished cable smoke density: light transmittance is not less than 70%.
· Radiation resistance: 25 × 104Gy
· Halogen-free: When non-metallic materials are burned, the acidity (expressed by PH value) of the escaping gas should be greater than 4.3; the conductivity is not greater than 10μS / mm.3. Bare 3.wire and bare conductor products
The main characteristics of this type of product are: pure conductor metal, no insulation and sheath layer, such as steel core aluminum stranded wire, copper aluminum bus bar, electric locomotive wire, etc .; the processing technology is mainly pressure processing, such as melting, rolling, drawing System, stranding / compacting stranding, etc .; products are mainly used in suburbs, rural areas, user main lines, switch cabinets, etc.