Encapsulated three=phase medium voltage switchgear - is filled with insulating gas with diverters mounted in series and transformers in outlet chamber

摘要

The encapsulated multiphase switchgear has an output chamber per switching panel, in the inside of which are integrated, cable connectons arranged in phases one behind the other. A branch conductor (2) and an isolatable inductive voltage transformer (41, 42, 43) are connected during a votlage test and arranged in a delta configuration. The HV connection of each one of the inductive transformers, in the operating position, is connected to the branch conductor of the respective phase via a switching element. The switching elements of all of the phases are connected by means of a shaft (7) located in the output compartment so that the shaft (7) can be connected with an operating part (22) arranged outside the encapsulation and swivellable for isolating the transformers. The output compartment (1) is square with flat sides (20b, 20c), and the switching elements (5) are swivelled. The geometrical assignment of the branch conductor and the inductive transformers, seen in the direction of the longitudinal axis of the branch conductor in the middle phase, is reversed compared with that in the outer phases. ADVANTAGE - Facilitates compact design of switchgear outgoing chamber, with testing, isolating and earthing arrangements.