Electric power infrastructure

single or rarely double wire used to transmit electrical energy to trains, trams, or trolleybuses, hanging above the route of the vehicle

post used by public utilities to support overhead wires and related equipment

thumb|High-voltage switchgear thumb|A section of a large switchgear panel thumb|Tram switchgear thumb|This circuit breaker uses both SF6 and air as insulation.

switch used for high-voltage applications.

An interconnector (also known as a DC tie in the USA) is a structure which enables high-voltage DC electricity to flow between electrical grids, connecting separate AC networks, or linking synchronous grids. It may be formed of submarine power cables, underground power cables or overhead power lines.

computer-based system with software-based protection algorithms for the detection of electrical faults

gantry structure supporting overhead power lines in a switchyard

assembly of one or more enclosed sections having a common power bus and principally containing motor control units