3. Hybrid equipment: circuit-breaker-disconnector

With over 30 years' experience in metal-encapsulated equipment, it was tempting to use some of the solutions that have been developed to reduce the footprint of air-insulated substations.

• Air-insulated "compact" substations have metal-enclosed circuit breakers, line disconnectors and earthing switches, which are connected to the overhead lines or busbars via SF ₆ /air bushings (figure 21 ).

  This highly compact package also includes integrated current and voltage measuring reducers. It can be pre-assembled and adjusted at the factory, then delivered in a single package,...