Cross-linked Polyethylene Insulated Power Cable for 35kV and Below

Application:

The cable is used in power transmission and distribution systems with rated voltages of 0.6/1, 1.8/3, 3.6/6, 6/6, 6/10, 8.7/10, 8.7/15, 12/20, 18/20, 18/30, 21/35, 26/35kV.

Model and Name 

Cable Installation and Operating Conditions

Cable Installation

• 1. Cable temperature during installation shall not be lower than 0°C. When ambient temperature is below 0°C, the cable should be preheated;

• 2. Bending radius during installation shall not be less than 12 times the cable outer diameter;

• 3. After installation, apply 4U₀ DC voltage for 15 minutes for cables 3kV and below; apply phase-to-phase voltage U AC voltage for 15 minutes for cables 6kV and above.

Installation in Air

• 1. When single-core cables are laid in parallel, center distance is 2 times cable diameter for 185mm² and below, and 90mm for 240mm² and above;

• 2. Ambient temperature: 40°C;

• 3. Maximum allowable conductor temperature: 90°C;

• 4. Ampacity correction factor at different ambient temperatures:

Direct Burial Installation

• 1. When single-core cables are laid without contact, center distance is 2 times cable diameter;

• 2. Ambient temperature 20°C;

• 3. Maximum allowable conductor temperature: 70°C;

• 4. Soil thermal resistivity: 1.0°C·m/W;

• 5. Burial depth: 0.7m;

• 6. Ampacity correction factor at different ambient temperatures;