This International Standard applies to self-commutated converter valves, for use in a three-phase bridge voltage sourced converter (VSC) for high voltage d.c. power transmission or as part of a back-to-back link. It is restricted to electrical type and production tests.

[A1_start]The scope of this standard includes the electrical type and production tests of dynamic braking valves which may be used in some HVDC schemes for d.c. overvoltage limitation.[A1_end]

The tests specified in this standard are based on air insulated valves. For other types of valves, the test requirements and acceptance criteria [A1_start]Text deleted[A1_end][A1_start]should[A1_end] be agreed [A1_start]between the purchaser and the supplier[A1_end].