Motor control center units with retractable stabs and interlocks using portal shutters
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United States of America Patent
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Dec 27, 2016
Grant Date -
Dec 31, 2015
app pub date -
Jun 30, 2014
filing date -
Jun 30, 2014
priority date (Note) -
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Abstract
Motor control centers have units or buckets with one or more sliding shutters that controllably block access to a stab isolation port based on position of the operator disconnect handle using attached cams that slide the shutter right and left. A front panel of the unit or bucket may also be configured to pivot out about a long axis associated with a bottom long side thereof.
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