Medium voltage switchgear with front accessibility of current transformers mounted external to a rear of a circuit breaker compartment
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United States of America Patent
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-
Apr 11, 2017
Grant Date -
Jul 7, 2016
app pub date -
Jan 5, 2015
filing date -
Jan 5, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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