An overcurrent tripping device includes a tripping conductor connected to the main circuit; a fixed core inside which the tripping conductor penetrates and which is excited by current flowing through the tripping conductor; a movable core which is arranged to be opposed to the fixed core with a magnetic gap therebetween, and which forms a magnetic circuit in cooperation with the fixed core, and moves by being attracted by the fixed core when overcurrent flows through the tripping conductor; and a shaft fixed to the movable core to guide the movement of the movable core, and linked to the tripping mechanism of the circuit breaker, wherein the fixed core has a narrow gap formed in such a direction as to cross the magnetic circuit, so that magnetic saturation is suppressed by the narrow gap.

The present disclosure proposes acompact electromagnetic push switch assembly with integration of an electromagnetic coil to push switch that can be directly fixed to the panel without any extra items. The cost and space required in order to make electrical panels and starters are reduced and further provide automation in domestic and industrial automation areas. A compact electromagnetic push switch assembly 100 comprises of a switch section 101, an operating member 102, a primary rod structure 103, a secondary rod structure 104, a spring 105, an electromagnetic coil 106, and a control unit. The contactors and relays in pumps or motor controllers for tripping required items are also replaced with 1 Amp to 40 amp relays and the push switch is designed to operate with any required voltage and Amps with AC or DC supply. The electromagnetic push switch is used in domestic, industrial, agriculture, hospitals, etc.

A shunt trip assembly is structured to be operatively coupled to a number of circuit breakers. The shunt trip assembly includes a housing assembly and an actuating assembly. The actuating assembly includes a limited number of components. In another embodiment, the shunt trip assembly housing assembly is a substantially sealed housing assembly. In another embodiment, the shunt trip assembly housing assembly includes a single mounting panel.

A circuit for a circuit interrupter is provided. The circuit may in include a first SCR configured to receive a first trigger signal at a gate of the first SCR, a second SCR configured to receive a second trigger signal at a gate of the second SCR, and a third SCR configured to receive a third trigger signal at a gate of the third SCR. A cathode of the first SCR may be connected to an anode of the third SCR. A cathode of the second SCR and a cathode of the third SCR may be connected to a ground. Methods of operating a circuit interrupter and a circuit are also provided.

A reset lockout mechanism for a circuit breaker includes a linkage, a rocker, an armature, a solenoid, and a plunger. The linkage is positioned to move between an open position and a closed position. The rocker is selectively engageable with the linkage. The armature is selectively engageable with the rocker. The plunger is supported by the solenoid and operatively coupled to the armature. The plunger is movable between a first position and a second position.

An electromagnetic trip unit, wherein: the electromagnetic trip unit includes a movable core, an upper static core and a lower static core; the movable core can move relative to the upper static core and the lower static core in the upper static core and the lower static core; a movable core body end of a movable core body of the movable core faces and approaches the lower static core end of the lower static core, when the electromagnetic trip unit is not released, a first magnetic field air gap is formed between the movable core body end and the lower static core end; the movable core body of the movable core is also provided with a movable core body step, when the electromagnetic trip unit is not released, a second magnetic field air gap is formed between the movable core body step and the lower static core end.

In one example, a sliding block module is provided. The sliding block module may include a block seat, a sliding block, and a first arm assembly. The sliding block may be at least partially disposed within the block seat, and may be configured to move vertically therein. The block seat and the first arm assembly may form a first hinge upon which the first arm assembly may rotate. The first arm assembly may include a first conductive component. The first arm assembly may be biased to rotate inwardly toward the block seat and the sliding block. The sliding block module may be utilized as part of mechanical trip/reset assembly of, for example, a circuit interrupter.

A circuit interrupting safety device (CISD) interrupts the flow of current through a pair of lines extending between a source of power and a load. The CISD includes a column reset assembly functioning as a circuit breaker and a contact actuator, a relay circuit including a solenoid, and a fault detecting circuit packaged in a circuit assembly. The solenoid includes a solenoid pin in an extended state when the CISD is reset and a non-extended state when the CISD is tripped.

A method for adjusting a magnetic release mechanism includes steps: a first measurement of the present release current I of the magnetic release mechanism is carried out, a decision is made as to whether an adjustment step is performed, a start-adjustment current I.sub.J0 is selected, a second measurement of the present release current I of the magnetic release mechanism is carried out, a decision is made as to whether an adjustment step is performed and that in the event that an adjustment step is necessary, a selection of a certain differential amount ΔI.sub.J takes place, partial demagnetisation of the permanent magnet is carried out in a further adjustment step with the adjustment current I.sub.J formed in this way and the steps are carried out in succession until the release current I measured lies within a specified range between I.sub.TARGET.sub._.sub.min and I.sub.TARGET.sub._.sub.max.

A reset lockout mechanism for a circuit breaker includes a linkage, a rocker, an armature, a solenoid, and a plunger. The linkage is positioned to move between an open position and a closed position. The rocker is selectively engageable with the linkage. The armature is selectively engageable with the rocker. The plunger is supported by the solenoid and operatively coupled to the armature. The plunger is movable between a first position and a second position.