SF6 circuit breaker, gas insulated switchgear (GIS), disconnector, power transformer, converter transformer, smoothing reactor, serial reactor and other special transformers;
D.C. transmission converter valve;
High voltage porcelain, zinc oxide lightening arrester;
Current transformer, capacitive voltage transformer and shunt, serial, coupling, voltage sharing, or filter capacitors, etc.; and
High and low voltage switchgear and distribution equipments.