Disclosed herein are passive triggering mechanisms for activation of pyrotechnic features within electrical switching devices, such as contactor devices and fuse devices. The activation of the pyrotechnic features is configured to change the configuration of the internal components of the switching device and prevent current flow through the device. In some embodiments, the triggering mechanisms comprise features that respond to a magnetic field, such as a reed switch. In some embodiments, threshold strength of a magnetic field needed to trigger the passive triggering mechanism, which corresponds to a threshold level of current running through the switching devices indicating a dangerous overcurrent, can be adjusted based upon the distance between the passive triggering mechanism and a portion of the device such as a power terminal or feature connected to a power terminal.

Disclosed herein are passive triggering mechanisms for activation of pyrotechnic features within electrical switching devices, such as contactor devices and fuse devices. The activation of the pyrotechnic features is configured to change the configuration of the internal components of the switching device and prevent current flow through the device. In some embodiments, the triggering mechanisms comprise features that respond to a magnetic field, such as a reed switch. In some embodiments, threshold strength of a magnetic field needed to trigger the passive triggering mechanism, which corresponds to a threshold level of current running through the switching devices indicating a dangerous overcurrent, can be adjusted based upon the distance between the passive triggering mechanism and a portion of the device such as a power terminal or feature connected to a power terminal.

Provided is a trip mechanism for DC molded case circuit breaker, in which the insulating distance between the poles increases without any increase in whole product size, thereby reliably providing a trigger output against an over current and a fault current instantaneous breaking required. The trip mechanism includes a trip mechanism part including an instantaneous trip mechanism, the instantaneous trip mechanism including a movable member to operate according to a fault current instantaneous breaking required, and a thermal trip mechanism including a bimetal to operate according to an over current, the trip mechanism part being provided for one of two adjacent poles; a crossbar that is rotatable by contacting and pressing of the movable member of the instantaneous trip mechanism or the bimetal of the thermal trip mechanism; and a shooter that is provided to be rotatable by contacting of the crossbar rotating.

Provided is a trip mechanism for DC molded case circuit breaker, in which the insulating distance between the poles increases without any increase in whole product size, thereby reliably providing a trigger output against an over current and a fault current instantaneous breaking required. The trip mechanism includes a trip mechanism part including an instantaneous trip mechanism, the instantaneous trip mechanism including a movable member to operate according to a fault current instantaneous breaking required, and a thermal trip mechanism including a bimetal to operate according to an over current, the trip mechanism part being provided for one of two adjacent poles; a crossbar that is rotatable by contacting and pressing of the movable member of the instantaneous trip mechanism or the bimetal of the thermal trip mechanism; and a shooter that is provided to be rotatable by contacting of the crossbar rotating.

An electrical installation switching device has an insulating material housing; a switching knob protruding beyond the housing on a housing front face and able to pivot between a switched-on and switched-off position about a first pivot axis; a magnetic short circuit current and/or a thermal excess current trigger; a contact site formed from a fixed and a moveable contact piece, a switching lock having a latching site and being triggerable by an excess and/or short circuit current using the trigger when unlatching the latching site; an operator pivotable between a release and an operating position about a second pivot axis, aligned parallel to the first pivot axis, switching knob having an operating contour, the operator and operating contour cooperating by triggering the switching lock using the trigger when the operator pivots about the second pivot axis to hold the knob in an intermediate position between the on and off position.

A touchless magnetic-only coupled solenoid trip system for a miniature circuit breaker achieves magnetic tripping using a floating plunger assembly in a solenoid coil/housing to narrow a magnetic gap between plunger and trip assembly to cause the magnetic trip The floating plunger of the solenoid can also move out of the way if the bimetal bends to cause a thermal trip.

An electromagnetic actuator including a magnetic housing, a coil that is rigidly connected to the housing and is capable of being connected to an electric circuit, a magnetic core that is arranged in the coil and can move along a central axis defined by the coil and according to the strength of the current flowing in the coil, and a shunt that is arranged in the coil and includes a magnetocaloric material the magnetisation of which is temperature-dependent. The shunt is arranged in the coil along the central axis along a length so as to create an air gap between the shunt and the magnetic core. The actuator further includes a device for attaching the shunt to the housing that are designed to adjust the length.

An electromagnetic actuator including a magnetic housing, a coil that is rigidly connected to the housing and is capable of being connected to an electric circuit, a magnetic core that is arranged in the coil and can move along a central axis defined by the coil and according to the strength of the current flowing in the coil, and a shunt that is arranged in the coil and includes a magnetocaloric material the magnetisation of which is temperature-dependent. The shunt is arranged in the coil along the central axis along a length so as to create an air gap between the shunt and the magnetic core. The actuator further includes a device for attaching the shunt to the housing that are designed to adjust the length.

A switching device includes: an electronic trip unit; an actuator; a switching mechanism connected via the actuator to the electronic trip unit; a stationary contact; a mobile contact, which is coupled to the switching mechanism; and an alarm module. The alarm module includes: a first, a second, and a third connector; a first relay having a first contact which is connected to the first connector and having a second contact which is connected to the second connector; a second relay with a first contact which is connected to the third connector; and a control unit which is coupled on an output side to a control side of the first relay and to a control side of the second relay, and on the input side to the electronic trip unit.

A circuit breaker includes a short-circuit trip and an overcurrent trip. The short-circuit trip has a trip coil, and the overcurrent trip has a bimetallic element. A first terminal of the trip coil is conductively connected to a fixed contact carrier of the circuit breaker. The bimetallic element is connected in series with the trip coil. The bimetallic element is connected at least indirectly to a first connection terminal of the circuit breaker, and the first connection terminal is connected to the fixed contact carrier by a bypass line.