A molded case circuit breaker configured to protect its ports and cables is provided. The molded case circuit breaker comprises an electronic trip unit (ETU) including communication ports or a thermomagnetic trip unit (TMTU). The molded case circuit breaker further comprises a terminal cover configured to pass cables that connect to the communication ports of the ETU and pass the cables over lugs without touching the lugs. The molded case circuit breaker further comprises a cable box cover that protects the cables of the ETU from external harm. The terminal cover including an emboss fixture having emboss guides for alignment and fixing of the cable box cover. The electronic trip unit (ETU) or the thermomagnetic trip unit (TMTU) and the cable box cover are assembled with one or more screws. The cable box cover is prevented from falling after the one or more screws are taken out from the terminal cover regardless of how the circuit breaker is mounted.

An indicator is provided that can couple, without a fastener, to a housing of an industrial device.

A molded case circuit breaker configured to protect its ports and cables is provided. The molded case circuit breaker comprises an electronic trip unit (ETU) including communication ports or a thermomagnetic trip unit (TMTU). The molded case circuit breaker further comprises a terminal cover configured to pass cables that connect to the communication ports of the ETU and pass the cables over lugs without touching the lugs. The molded case circuit breaker further comprises a cable box cover that protects the cables of the ETU from external harm. The terminal cover including an emboss fixture having emboss guides for alignment and fixing of the cable box cover. The electronic trip unit (ETU) or the thermomagnetic trip unit (TMTU) and the cable box cover are assembled with one or more screws. The cable box cover is prevented from falling after the one or more screws are taken out from the terminal cover regardless of how the circuit breaker is mounted.

The power distribution module includes a power busbar, a primary load output module, a secondary load output module, a battery module, and a signal-driven collection module, where each of the primary load output module, the secondary load output module, and the battery module includes a circuit breaker, the power busbar is connected to the circuit breaker, the signal-driven collection module is connected to the circuit breaker to collect a circuit breaker signal, the signal-driven collection module includes a plurality of first signal units sequentially arranged in a first direction, an integer quantity of first signal units are disposed in a connection area in which the signal-driven collection module is connected to each circuit breaker, and each circuit breaker is provided with a second signal unit.

A safety apparatus is a terminal shield having an indication circuit incorporated therein. The safety apparatus is usable with a circuit interrupter to overlie one or more terminals of the circuit interrupter that are connected with line and load conductors and to thereby form a circuit interrupter apparatus. The safety apparatus can be employed at the line side of a circuit interrupter, at the load side of a circuit interrupter, or at both sides of a circuit interrupter. The safety apparatus can be provided as part of a new circuit interrupter apparatus or can be provided to retrofit existing circuit interrupters. The indication circuit advantageously outputs from a top surface of the terminal shield one of a visual indication and an audible indication when one or more terminals of the circuit interrupter are electrified, thereby easily conveying to a technician the portions of the circuit interrupter that are electrified.

A circuit breaker design allows for the circuit breaker to have an overall height (i.e., measured vertically along the circuit breaker's exposed outwardly-facing surface in the typical orientation of circuit breaker panels) that is slimmer than achievable with known typical configurations, while at the same time still providing robust power (e.g., voltage) handling and arc interruption capabilities. This is achieved, for example, by providing various components formed from polymer materials (which are generally less conductive of heat than metals), reinforced by metal members in certain areas, if needed, as well as a very particular configuration of a permanent magnet that is employed for enhanced arc quenching.

An apparatus for retracting and extending a main body of a circuit breaker includes: a conveying module for retracting or extending the main body into or from a distribution box of the circuit breaker; a lever module including a lever selectively switching between a first state and a second state, where the lever module allows movement of the conveying module when the lever is in the first state, and disallows movement of the conveying module when the lever is in the second state; and an interlock module configured to allow the lever to switch to the first state only when a predetermined external input is applied to the interlock module.

A circuit interrupter adapted to be detachably connected to a rail system includes a housing having a notch disposed thereon adapted to receive a first leg of the rail system. An engagement member having a notch disposed therein adapted to receive a second leg of the rail system is slideably carried by the housing such that the notch in the engagement member is moveable in a first plane toward and away from the notch in the housing between an engaged position and a disengaged position. An actuation member is slideably carried by the housing and is moveable in a second plane, different than the first plane, between an actuated position and an unactuated position, movement of the actuation member in the second plane being translated into movement of the engagement member in the first plane.

A panel device includes a protective cover that has an insertion hole for an ON/OFF knob of a molded case circuit breaker and is formed to cover an exposed live part of the molded case circuit breaker and provided with an engaging part at a predetermined portion thereof; a cover support member that openably and closably supports this protective cover; and a cover locking member that engages with the engaging part when the protective cover is closed and restricts turning of the protective cover; wherein any one of the protective cover, the cover support member and the cover locking member is movably provided in conjunction with movement of the ON/OFF knob, and the engaging part and the cover locking member are engaged with each other or released from each other by the movement of the any one of those.

A circuit breaker and panel system includes a panel including a base pan having a plurality of base pan electrical connections. A circuit breaker including a housing having a plurality of circuit breaker electrical connections arranged to contact the base pan electrical connections when the circuit breaker is coupled to the base pan. The circuit breaker is rotatably coupleable with the base pan via a pivot joint for engaging the plurality of base pan electrical connections with the plurality of circuit breaker electrical connections per a predetermined electrical connection coupling sequence. One of the housing and the base pan includes a protrusion and the other of the housing and the base pan includes a corresponding recess which, when engaged with each other, retain the housing to the base pan to prevent reverse rotational movement of the breaker with respect to the base pan.