Abb Schweiz Ag

Abb Technology Ag

Stefano Motta

Frantisek Koudelka

Amar Kini

Zdenek Kutalek

A bushing structure for a switchgear includes a mounting portion constructed and arranged to mount the bushing structure. A barrel portion extends from the mounting portion and is coaxial there-with. The barrel portion includes a plurality of undulations in a peripheral surface thereof to increase creepage distance. A primary contact is disposed within and extends a length of the barrel portion. The primary contact has a first end constructed and arranged to be contacted by a movable contact of the switchgear and a second end constructed and arranged to be connected with a busbar.

Integrated compact bushing structure combining the functionality of primary contact with a current transformer primary conductor and a post insulator

A switchgear includes a circuit breaker housing defining a circuit breaker compartment. A bushing has first and second portions and extends through an opening in a rear wall of the housing so that the first portion is disposed in the circuit breaker compartment and the second portion is disposed beyond the exterior of the rear wall and external of the circuit breaker compartment. The bushing has a hollow primary contact. A current transformer is mounted on the second portion of the bushing. A fastener structure has a portion that extends through the hollow primary contact. The fastener structure couples the primary contact to a busbar in a removable manner. When the fastener structure is decoupled from the primary contact, the bushing and the at least one current transform can be accessed from the front of the housing and moved through the opening in the rear wall, for maintenance.

Medium voltage switchgear with front accessibility of current transformers mounted external to a rear of a circuit breaker compartment

Side panels for a compartment of a switchgear include a first panel structure and a second panel structure that is identical to the first panel structure. Each panel structure has a body with symmetric surface features in the body. Certain of the surface features are offset from a plane of symmetry of the body. The first panel structure is constructed and arranged to define a left side of the compartment and the second panel structure, upon proper orientation, is constructed and arranged to define an opposing, right side of the compartment.

Medium voltage switchgear construction using symmetric sheet metal parts and panels to build compartment assemblies and subassemblies

A switchgear includes a housing having a wall separating a circuit breaker compartment from a bus/cable compartment. A plurality of bushings is provided. Each bushing has first and second portions. Each bushing extends through the wall so that the first portion is disposed in the circuit breaker compartment and the second portion is disposed in the bus/cable compartment. Each second portion has an extension. At least one current transformer is mounted on the extension of the second portion of each bushing. The extensions are constructed and arranged so that a phase to phase distance is 180 mm or less. Such a configuration also decreased the overall size of the switchgear.

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Besana Brianza, Italy

Stefano Motta