This standard applies to tests on radial-field impregnated-paper insulated cables and accessories in which, during normal operation, a gas pressure exceeding 12 MPa (1.2 bar) gauge is applied internally i.e. with the gas in direct contact with the insulation. The tests are applicable to cables and accessories intended to be used in systems with a nominal voltage not exceeding 275 kV between phases.
DS/HD 634 S1:2004 history
2004DS/HD 634 S1:2004 Tests on internal gas-pressure cables and accessories for alternating voltages up to and including 275 kV (Um = 300kV)