SSH HD 634 S1:1997

Tests on internal gas-pressure cables and accessories for alternating voltages up to and including 275 kV (Um = 300 kV)

Scope

HD 634 applies to tests on radial-field impregnated-paper-insulated cables and accessories in which, during normal operation, a gas pressure exceeding 1,2 MPa (12 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.
This Part (Part 1) specifies the general test methods applicable to these cables, unless otherwise specified in the particular sections of Part 3 of this HO. However, the summary of tests as listed in one only of the particular sections in Part 3 of this HD is mandatory for the particular cable ordered.
Part 2 specifies additional test methods applicable to certain particular sections of Part 3 of this HO.
Part 3 specifies the lists of tests applicable to the particular cable type.