underground cable 132kv 66kv 110 kv single core 500mm2,XLPE insulated high voltage cable power station cable line

 The Conductor is copper or aluminum. The out sheath is PE or PVC.

Cross-sectional area: 240-1200mm2

 Usage: Suitable for the places with a higher underground water level and to be used underground, in the tunnels or pipes. Such cables bear a bigger pulling force and pressure. 

 Specific property for usage of 110KV~220KV XLPE high-voltage cable

1. Cable’s conductor highest working temperature is allowed up to 90°C, and overload when meet an emergency is 130°C ,When short circuit (in ≤5 seconds) the highest temperature is 250°C
2. When installing or laying cable, the ambient temperature should be less than -20°C, and have to give a preheat to cable.

3.The minimum bending diameter:

Note: In form, D₀ is a real test value to cable’s outer diameter.

4. Allowed biggest axial traction force to outer diameter when laying cable (not consider the radial lateral-pressure at bent section) T=K×core NO. ×section (kg), in formula, the coefficient K value should be: the copper core get 7, the aluminum core get 4

5. Allowed biggest lateral-press P, when cable is being bent

The single core cable is required P≤500kg/m.

P=T/R (T is indicated axial traction force; R is indicated radius of bent-wheel), Knowing from above formula, as the traction force is made up by length and weight of cable. So it lets P to applying requirement as above. Then the diameter of bent-wheel should be widened.

 Note: ZR means flame retardent

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