Disclosed is an air circuit breaker. The air circuit breaker according to an embodiment of the present disclosure includes a CT magnet unit. The CT magnet unit is provided in the air circuit breaker to cover a movable contact point exposed to the outside. A CT magnet is provided inside a case that forms the outer shape of the CT magnet unit. The CT magnet independently forms a sub magnetic field or forms a main magnetic field together with an extinguishing magnet provided in an arc extinguishing unit. Due to the magnetic field formed by the CT magnet, an arc that is generated receives the application of an electromagnetic force directed toward the arc extinguishing unit. Accordingly, the generated arc can be quickly moved and extinguished.

Stackable electric contact block including a casing that defines its volume, the casing having upper and lower faces for connecting the block to another component, the casing accommodating a screw for fixing the block to another component, and a press rod capable of moving from a rest position to an activation position for transferring a translation force to a component attached to the lower face of the casing, the press rod including an activation head in the form of a wedge capable of engaging with a push-button or a rotary knob, the casing including a cavity for guiding the press rod between its rest and activation positions, in which cavity the press rod is accommodated. A device for guiding the press rod into the guide cavity includes a guide tab accommodated in a matching guide slot passing through the activation head.

Stackable electric contact block including a casing that defines its volume, the casing having upper and lower faces for connecting the block to another component, the casing accommodating a screw for fixing the block to another component, and a press rod capable of moving from a rest position to an activation position for transferring a translation force to a component attached to the lower face of the casing, the press rod including an activation head in the form of a wedge capable of engaging with a push-button or a rotary knob, the casing including a cavity for guiding the press rod between its rest and activation positions, in which cavity the press rod is accommodated. A device for guiding the press rod into the guide cavity includes a guide tab accommodated in a matching guide slot passing through the activation head.

The present disclosure provides a high voltage and high current switch with zero-phase waiting and a control method. The switch includes two or more switching units connected in series, each of the switch unit modules includes a main switch circuit, an auxiliary switch circuit, a voltage-equalizing power supply circuit unit, a switch control and communication circuit unit, and a current transformer; and the auxiliary switch circuit and the voltage-equalizing power supply circuit unit are connected in parallel between two ends of the main switch circuit, and the current transformer is connected to the main switch circuit; an output of the current transformer is connected to the voltage-equalizing power supply circuit unit which supplies power to the switch control and communication circuit unit, and the switch control and communication circuit unit is configured to control the closing and opening of a main relay and an auxiliary relay.

The present disclosure provides a high voltage and high current switch with zero-phase waiting and a control method. The switch includes two or more switching units connected in series, each of the switch unit modules includes a main switch circuit, an auxiliary switch circuit, a voltage-equalizing power supply circuit unit, a switch control and communication circuit unit, and a current transformer; and the auxiliary switch circuit and the voltage-equalizing power supply circuit unit are connected in parallel between two ends of the main switch circuit, and the current transformer is connected to the main switch circuit; an output of the current transformer is connected to the voltage-equalizing power supply circuit unit which supplies power to the switch control and communication circuit unit, and the switch control and communication circuit unit is configured to control the closing and opening of a main relay and an auxiliary relay.

An electric circuit breaker device includes an igniter provided to a housing, a projectile disposed in a cylindrical space formed in the housing, the projectile being movably formed in the cylindrical space by energy received from the igniter, a conductor piece that is provided to the housing, forms a portion of an electric circuit, includes a cutoff portion to be cut off by the projectile in a portion thereof, and is disposed with the cutoff portion crossing the cylindrical space, an arc-extinguishing region positioned within the cylindrical space, on a side opposite to the projectile prior to actuation of the igniter with the cutoff portion interposed between the arc-extinguishing region and the projectile, and configured to receive the cutoff portion cut off by the projectile, and a coolant material having a fibrous form and disposed in the arc-extinguishing region.

An electric circuit breaker device includes an igniter provided to a housing, a projectile disposed in a cylindrical space formed in the housing, the projectile being movably formed in the cylindrical space by energy received from the igniter, a conductor piece that is provided to the housing, forms a portion of an electric circuit, includes a cutoff portion to be cut off by the projectile in a portion thereof, and is disposed with the cutoff portion crossing the cylindrical space, an arc-extinguishing region positioned within the cylindrical space, on a side opposite to the projectile prior to actuation of the igniter with the cutoff portion interposed between the arc-extinguishing region and the projectile, and configured to receive the cutoff portion cut off by the projectile, and a coolant material having a fibrous form and disposed in the arc-extinguishing region.

Stackable electric contact block including a casing that defines its volume, the casing having upper and lower faces for connecting the block to another component, the casing accommodating a screw for fixing the block to another component, and a press rod capable of moving from a rest position to an activation position for transferring a translation force to a component attached to the lower face of the casing, the press rod including an activation head in the form of a wedge capable of engaging with a push-button or a rotary knob, the casing including a cavity for guiding the press rod between its rest and activation positions, in which cavity the press rod is accommodated. A device for guiding the press rod into the guide cavity includes a guide tab accommodated in a matching guide slot passing through the activation head.

Stackable electric contact block including a casing that defines its volume, the casing having upper and lower faces for connecting the block to another component, the casing accommodating a screw for fixing the block to another component, and a press rod capable of moving from a rest position to an activation position for transferring a translation force to a component attached to the lower face of the casing, the press rod including an activation head in the form of a wedge capable of engaging with a push-button or a rotary knob, the casing including a cavity for guiding the press rod between its rest and activation positions, in which cavity the press rod is accommodated. A device for guiding the press rod into the guide cavity includes a guide tab accommodated in a matching guide slot passing through the activation head.

A unipolar switching module made of insulating material and including an incorporated thermomagnetic tripping set, and/or a current measurer and power supply set for an electronic controller A multipolar low-voltage molded case circuit breaker can include unipolar switching modules, which interact with the tripping set and/or the current measurer and power supply set.