Safe use panelboard keyed shutter system
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United States of America Patent
Stats
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Mar 14, 2017
Grant Date -
Jun 23, 2016
app pub date -
Dec 23, 2014
filing date -
Dec 23, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and systems for reducing exposure to live parts in a panelboard allow a circuit breaker or other branch electrical device to be safely installed and removed from the panelboard. The methods and systems provide a shutter system that operates in conjunction with the circuit breaker or other branch electrical device to automatically restrict access to the conductors in the panelboard until the circuit breaker is inserted in the panelboard. Specifically, the circuit breaker has one or more insertion keys on its casing that align with and fit into one or more keyed openings in the shutter system. When the circuit breaker is inserted into the panelboard, the insertion keys automatically force open the shutter system to allow the circuit breaker terminals to contact the conductors. Removing the circuit breaker from the panelboard automatically closes the shutter system and prevents fingers or tools from inadvertently accessing the conductors.
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