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US 11,955,780 B2Granted
Motor control center (MCC) units with retractable power connector and interlocks including a power connector position interlock
AssigneeEaton Intelligent Power Limited
InventorsDaniel Boyd Kroushl, Alfred Gregory Beard, Edgar Yee
Life of this patent
Estimating the term…
Abstract
Motor control centers have units or buckets with an extendable/retractable power connection (stab) assembly and one or more operating lever interlocks that include a unit latch to latch to a cabinet and a power connection position interlock that blocks the handle of the units or buckets based on position of the power connection assembly, optionally also including a shutter cam that slides a shutter right and left.
Claims20
A bucket assembly for a motor control center (MCC), comprising:
- a power connection assembly;
- a handle assembly operatively coupled to the power connection assembly, the operator handle assembly comprising an operator handle moveable between a first position corresponding to an active state of the power connection assembly and a second position corresponding to an inactive state of the power connection assembly;
- and
- a unit latch, the unit latch being selectively movable between a disengaged state in which the unit latch is not engaged with a cabinet of the MCC, and an engaged state in which the unit latch is engaged with the cabinet of the MCC,
- wherein in the disengaged state, the unit latch inhibits movement of the operator handle, and wherein in the engaged state, the unit latch does not inhibit movement of the operator handle.
2 more elements
A method of operating a unit of a Motor Control Center (MCC), comprising:
- providing a bucket assembly comprising a power connection assembly;
- setting a unit latch of the bucket assembly to a disengaged state, the unit latch being selectively movable between the disengaged state in which the unit latch is not engaged with a cabinet of the MCC, and an engaged state in which the unit latch is engaged with the cabinet of the MCC;
- engaging the unit latch with the cabinet of the MCC to transition the unit latch to the engaged state;
- and
- transitioning an operator handle of the bucket assembly to a first position, wherein operator handle is moveable between the first position corresponding to an active state of the power connection assembly and a second position corresponding to an inactive state of the power connection assembly,
- wherein in the disengaged state, the unit latch inhibits movement of the operator handle.
3 more elements
Dependencies are inferred from the claim text.