BUSHING-TYPE CURRENT TRANSFORMER FOR MEDIUM-VOLTAGE AIR- INSULATED METALCLAD SWITCHGEAR Russian patent published in 2004 - IPC

FIELD: medium-voltage switchgear for power supply and distribution. SUBSTANCE: switchgear has bushing-type current transformers with cable entries, number of transformers corresponding to phase number. Bushing-type transformers are fastened through detachable joint to metal bearing plate. Transformer has external section in the form of rectangular parallelepiped and internal part in the form of rectangular parallelepiped abutting against the latter. Terminal slots with concentric parts are fitted between them. Internal outline in vicinity of abutment to metal carrying plates has guide section that passes through metal bearing plate recess and is trapezoidaly beveled toward free area with longitudinal surfaces bent out from external outline. EFFECT: simplified design, enhanced safety in operation. 2 cl, 1 dwg