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.

One embodiment of a bogie apparatus may comprise: a horizontal frame; vertical frames respectively coupled to both ends of the horizontal frame and provided in a pair; an end bar having both end parts respectively coupled to one end of the pair of horizontal frames; and a connector assembly coupled to the end bar so as to move in at least one direction among upward, downward, left, and right directions. The connector assembly may comprise: a socket portion having a plurality of wiring terminals; a socket mounting portion having the socket portion mounted thereon, and provided in a plate shape; and a guide bushing formed so as to protrude from the socket mounting portion and away from the socket portion, and having a hollow.

One embodiment of a bogie apparatus may comprise: a horizontal frame; vertical frames respectively coupled to both ends of the horizontal frame and provided in a pair; an end bar having both end parts respectively coupled to one end of the pair of horizontal frames; and a connector assembly coupled to the end bar so as to move in at least one direction among upward, downward, left, and right directions. The connector assembly may comprise: a socket portion having a plurality of wiring terminals; a socket mounting portion having the socket portion mounted thereon, and provided in a plate shape; and a guide bushing formed so as to protrude from the socket mounting portion and away from the socket portion, and having a hollow.

Embodiments of a motor control unit for a motor control center and methods for servicing the same are provided. The motor control unit comprises a housing for enclosing one or more electrical components therein. The housing includes a retractable stab assembly and a lead screw assembly operably coupled thereto for extending and retracting one or more stabs for controlling the flow of power to the one or more electrical components.

Embodiments of a motor control unit for a motor control center and methods for servicing the same are provided. The motor control unit comprises a housing for enclosing one or more electrical components therein. The housing includes a retractable stab assembly and a lead screw assembly operably coupled thereto for extending and retracting one or more stabs for controlling the flow of power to the one or more electrical components.

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 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 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.

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.