1 Scope

This part of IEC 63042, which is a technical specification, applies to on-site acceptance tests of electrical equipment with the highest voltages of AC transmission system exceeding 800 kV and its protection and control system.

The electrical equipment exceeding 800 kV includes the following items:

• power transformers;

• circuit-breakers (CBs);

• gas insulated switchgear (GIS);

• gas insulated transmission line (GIL);

• surge arresters;

• voltage and current transformers;

• shunt reactors;

• series compensators;

• insulators;

• disconnectors and earthing switches;

• high-speed earthing switches (HSES).