A miniature circuit breaker, which includes a button mechanism, a circuit breaker housing, and a locking mechanism, wherein the button mechanism is arranged at one end of the circuit breaker housing and is in sliding fit with the circuit breaker housing, the locking mechanism includes a second locking member, the second locking member is pivotally arranged on the circuit breaker housing, the circuit breaker housing includes a second opening hole arranged on one side thereof, one end of the second locking member is in driving fit with the button mechanism, and the other end of the second locking member passes through the second opening hole and is in limit fit with a housing at an assembly position of the circuit breaker.

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 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.

An interlock system for a switchgear cabinet of a drawout switchgear device includes a guide rail in the cabinet to align rollers supporting the drawout switchgear device. A stop plate is spring biased toward a blocking position to block the rollers from rolling off the guide rail. A deflector surface on the stop plate receives a contact force from a fastener hook of a lift truck, to move the stop plate and unblock the rollers. The fastener hook then anchors the lift truck to the cabinet after the stop plate has moved away from the blocking position. A bridging guide rail mounted on the lift truck, aligns with and abuts the guide rail in the cabinet to allow the drawout switchgear device to be safely rolled into or withdrawn from the cabinet by an unassisted service person operating the lift truck.

The present disclosure relates to a withdrawable base module for a switch. The withdrawable base module comprises a base coupled to a busbar for electrically connected to the switch; a conversion assembly coupled to the base and comprising a drive mechanism, a first female contact and a carrying mechanism adapted to carry the switch; and an auxiliary assembly being slidable relative to the conversion assembly and comprising a first male contact electrically connected to the switch; wherein the drive mechanism is operable to drive the auxiliary assembly to cause the first male contact to move towards and contact the first female contact. The withdrawable base module according to embodiments of the present disclosure can provide a test circuit for the switch, and can achieve the rocking-in or rocking-out of the switch without additional human intervention after completion of the test.

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.