A secondary disconnect assembly is for electrically connecting and disconnecting accessories to an electrical switching apparatus, such as a power circuit breaker. The secondary disconnect assembly includes a terminal block assembly comprising a mounting member, at least one terminal block removably mounted on the mounting member, and at least one accessory plug structured to be removably inserted into the terminal block to be electrically connected to the terminal block. The terminal block and the accessory plug each include a plurality of error-proofing features. The error-proofing features prohibit insertion of the accessory plug into the terminal block unless the accessory plug is correctly disposed in a predetermined orientation.

A mechanism coupling structure of a molded-case circuit breaker according to an embodiment of the present disclosure including a shaft to one side of which a movable contactor is coupled, and on a part of which a rotating pinhole is formed in a penetrating manner; a base assembly into which the shaft is rotatably accommodated and coupled, a switch mechanism coupled to an upper portion of the base assembly and exposed with a first lower link and a second lower link at a lower side thereof, and a rotating pin coupled in a penetrating manner to the first lower link, second lower link and rotating pinhole may be provided therein, wherein the rotating pin has a protruding portion for release prevention at one end thereof.

An electrical wiring device including: a housing, a plurality of line terminals, feed-through load terminals and receptacle load terminals electrically connected to a pivotable contact structure or to a fixed contact structure comprising a conductive member having at least one contact positioned thereon, wherein in response to a make-force each pivotable contact structure is configured to perform a first pivotable movement to electrically connect each of the contacts on each pivotable contact structure to one of the contacts on a different one of the fixed contact structures in the reset state, thereby electrically connecting the terminals in the reset state; a circuit interrupting assembly including at least one breaking element being configured to perform a first linear movement in a first direction in response to a break-force in order to cause each pivotable contact structure to perform a second pivotable movement in a direction opposite the first pivotable movement to decouple each of the contacts on each pivotable contact structure from one of the contacts on a different one of the fixed contact structures thereby decoupling the terminals to effect a tripped state; and a protective electrical assembly.

Systems, devices and methods for racking circuit breakers in a switchgear cabinet include a drive mechanism that is flexibly linked to a racking mechanism associated with each circuit breaker. The drive mechanism can be connected for racking multiple circuit breakers without requiring re-positioning of the drive mechanism.

A miniature circuit breaker 10 having a handle assembly 100 formed of two separate pieces, namely a handle section 110 and a link section 150 with a first end 152 and a second end 154. The link section 150 is pivotally connected at the first end 152 to the handle section 110, and at the second end 154 to a movable blade 30 carrying the movable contact 32 of the circuit breaker. The handle section 110 can be formed of a plastic, and the link section 150 can be formed of a metallic material. A metallic link section can be thinner than an equivalent plastic part, and can provide a robust metal-to-metal interface with the blade 30 carrying the movable contact 32. The handle assembly 100 can also have one or more clearance gaps 132 and 134 designed between the handle section 110 and link section 150 to provide for a range of independent motion by the handle section 110 in relation to the link section 150.

A circuit breaker with a circuit breaker housing that includes a switch-on button hole and a switch-off button hole, a button mechanism that includes a switch-on button and a switch-off button, the switch-on button including a switch-on button operating end slidably arranged in the said switch-on button hole, the switch-off button including a switch-off button operating end slidably arranged in the switch-off button hole. While the switch-on button operating end is being pressed toward the inside of the circuit breaker housing to enable the circuit breaker to switch on, the switch-off button operating end moves toward the outside of the circuit breaker housing, and while the switch-off button operating end is being pressed toward the inside of the circuit breaker housing to enable the circuit breaker to switch off, the switch-on button operating end moves toward the outside of the circuit breaker housing.

A circuit interrupter having a first plate on which a stationary contact is positioned where the flow of electrical current through the first contact and first plate cause a magnetic field to form around the stationary contact such that an arc that may form in the vicinity of the stationary contact is urged toward arc extinguishing plate and vented out the bottom of the housing of the circuit interrupter. In one configuration the venting is formed as a split vent path to direct the venting of gas and debris in a controlled manner.

A front-accessible bus-connection mounting frame assembly in a draw out switchgear cabinet is fastened to the back wall of the breaker cabinet. The frame assembly provides for insertion and bayonet mounting of a primary bus connector's cylindrical conductor onto the mounting frame. The primary bus connector is bayonet mounted on the internal ribs of a central cylinder of the mounting frame assembly. The primary bus connector is then fixed in position by bolts front mounted down the central cylinder and out through a bus riser fitted at the back of the mounting frame assembly to establish electrical continuity. The central cylinder further provides a current transformer bushing tube around the primary bus connector and necessary flanges to mount the mounting frame assembly to the back wall and secure the current transformers around the bushing.

A circuit breaker includes an electrically insulative case and a rotor assembly disposed within the electrically insulative case. The rotor assembly includes a contact arm and a rotor that is rotatable relative to the electrically insulative case. The contact arm is coupled to the rotor and movable between a first position in which a conductive path is closed and a second position in which the conductive path is open. The rotor assembly also includes a latch mechanism coupled to the rotor. The latch mechanism retains the contact arm in the second position during a short circuit event. The latch mechanism is spaced from the contact arm when the contact arm is in the first position. The latch mechanism engages the contact arm when the contact arm is in the second position.

A secondary disconnect assembly is for an electrical switching apparatus, such as a power circuit breaker. The secondary disconnect assembly includes a terminal block mount having a number of first mounting features, at least one terminal block, and at least one accessory plug. Each terminal block includes a number of receptacles and a number of second mounting features, which cooperate with the first mounting features to properly align, mount and stabilize the terminal block on the terminal block mount. Each accessory plug includes a number of contact alignment features structured to align and guide the accessory plug into a corresponding one of the receptacles.