An electrically insulative case includes a door arranged to move between an opened position and a closed position and a rack mechanism arranged to move between an ON position and an OFF position. The electrically insulative case further includes an interlock including a plunger arranged to move between a locked position and an unlocked position. The interlock also includes an engagement mechanism that is coupled to the plunger. The engagement mechanism is arranged to move between a first position in which the engagement mechanism is spaced from the rack mechanism and a second position in which the engagement mechanism is engaged with the rack mechanism. The door is inhibited from moving to the opened position when the plunger is in the locked position. The plunger is arranged to move to the locked position when the engagement mechanism is in the second position and the rack mechanism is in the ON position.

A frame module for a circuit breaker includes a first interface structured to connect to a trip unit, a second interface structured to connect to a frame, and a current rating storage unit structured to store a current rating associated with the frame and to provide the stored current rating to the trip unit when the trip unit is connected to the first interface.

The present invention relates to the field of low-voltage electrical appliances, and more particularly to an operating mechanism of a circuit breaker. The operating mechanism is provided with two sets of four-link structures. Each set of four-link structures is composed of a second crank, a third link and a third crank. The third crank and the phase-pole rotating shaft have the same rotation center and are in driving connection with each other. The other set of four-link structures is composed of a second crank, a fourth link and an N-pole rotating shaft, so that the phase-pole rotating shaft and the N-pole rotating shaft can be arranged around different rotation centers, so as to provide more convenience for the design of the circuit breaker.

An electrical panel, for an aircraft, with a front plate, a rear plate, a PCB plate with an information processing unit, and a power supply plate for the power supply of at least one circuit breaker. The PCB plate and the power supply plate arranged between the front plate and the rear plate. Each of the plates has at least one passage orifice for the circuit breaker.