A safety device developed to promote more security and better efficiency in its use is provided to operate in the locking and actuation of electrical connectors positioned in extractable drawers for MCC cabinets, thereby setting a safety device capable of connecting or disconnecting the internal connectors, both principal and test connector, provided in the extractable drawer for MCC cabinet, the procedure is executed mechanically through an assembly of elements that interconnect two thin laminar plates and, these in turn, interconnected to each other, positioned inferiorly and of conformations corresponding to promote a perfect fit.

A safety device developed to promote more security and better efficiency in its use is provided to operate in the locking and actuation of electrical connectors positioned in extractable drawers for MCC cabinets, thereby setting a safety device capable of connecting or disconnecting the internal connectors, both principal and test connector, provided in the extractable drawer for MCC cabinet, the procedure is executed mechanically through an assembly of elements that interconnect two thin laminar plates and, these in turn, interconnected to each other, positioned inferiorly and of conformations corresponding to promote a perfect fit.

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.

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.

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.

A panel for accommodating a draw-out device, such as a vacuum circuit breaker or metering device, includes: a housing with an access opening for accommodating a draw-out device and with primary plugs and secondary plugs connectable to the draw-out device; a traveling system arranged in the housing and for positioning the draw-out device within the housing in a connected position, a service position, and a disconnected position; a door arranged on the housing and movable between a closed position to close the access opening and an open position for provide access to the housing; a primary blocking element for blocking movement of the traveling system from the disconnected position to the service position with the door in the open position or between the open position and the closed position; and a secondary blocking element for blocking the door to move into the closed position with the draw-out device being disconnected.

A low voltage electrical switchboard comprising a supporting structure having vertical uprights and horizontal crossbars and further comprising a busbar compartment housing one or more busbars and an apparatus compartment housing one or more electrical apparatuses, said busbar compartment and said apparatus compartment being separated by a partitioning and insulating wall, characterized in that said partitioning and insulating wall has a first surface facing said busbar compartment which is provided with a plurality of retaining and supporting means for said busbars, and a second surface facing said apparatus compartment which is provided with a plurality of openings for insertion/extraction of first connection means between said busbars and said one or more electrical apparatuses through said partitioning and insulating wall, said first connection means being provided with first insulation means that cooperate with said partitioning and insulating wall to increase the distance in air between the phases during insertion/extraction of said connection means, said low voltage switchboard being further provided with mechanical locking means for locking said one or more electrical apparatuses and preventing their insertion/extraction into/from an operating position in contact with said busbars under predetermined conditions.

A low voltage electrical switchboard comprising a supporting structure having vertical uprights and horizontal crossbars and further comprising a busbar compartment housing one or more busbars and an apparatus compartment housing one or more electrical apparatuses, said busbar compartment and said apparatus compartment being separated by a partitioning and insulating wall, characterized in that said partitioning and insulating wall has a first surface facing said busbar compartment which is provided with a plurality of retaining and supporting means for said busbars, and a second surface facing said apparatus compartment which is provided with a plurality of openings for insertion/extraction of first connection means between said busbars and said one or more electrical apparatuses through said partitioning and insulating wall, said first connection means being provided with first insulation means that cooperate with said partitioning and insulating wall to increase the distance in air between the phases during insertion/extraction of said connection means, said low voltage switchboard being further provided with mechanical locking means for locking said one or more electrical apparatuses and preventing their insertion/extraction into/from an operating position in contact with said busbars under predetermined conditions.

A motor control unit (MCU) and methods of operating the same are provided. The MCU includes a housing enclosing a retractable stab assembly (RSA) having stabs attached thereto. The MCU further includes a bracket assembly having a mount for securing the bracket assembly to the RSA, guiderails for slideably engaging the RSA to facilitate the extending and retracting motion, and a lead screw accessible via an opening in the front of the housing. Rotating the lead screw causes the RSA to extend and retract which engages and disengages the stabs. The MCU also includes a motor assembly having a drive motor coupled to a drive shaft. The motor rotates the shaft in response to control signals from a remote-device. The motor assembly attaches to the housing such that the rotation of the shaft in response to the signals rotates the lead screw to engage and disengage the stabs.

A motor control unit (MCU) and methods of operating the same are provided. The MCU includes a housing enclosing a retractable stab assembly (RSA) having stabs attached thereto. The MCU further includes a bracket assembly having a mount for securing the bracket assembly to the RSA, guiderails for slideably engaging the RSA to facilitate the extending and retracting motion, and a lead screw accessible via an opening in the front of the housing. Rotating the lead screw causes the RSA to extend and retract which engages and disengages the stabs. The MCU also includes a motor assembly having a drive motor coupled to a drive shaft. The motor rotates the shaft in response to control signals from a remote-device. The motor assembly attaches to the housing such that the rotation of the shaft in response to the signals rotates the lead screw to engage and disengage the stabs.