The insulation provided to underground
cables should NOT have .
High viscosity at working temperature
High resistivity
Low absorption of moisture
Low thermal coefficient
High viscosity at working temperature
The insulation provided to underground
cables should have the following properties -
(a) High resistivity
(b) High Dielectric strength
(c) Low moisture absorption
(d) Low thermal co-efficient
(e) Low Permittivity
Underground cables uses low viscosity oils for impregnation.
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