The invention relates to a low-voltage switching device comprising an electromagnetic drive having a coil (1), a fixedly positioned yoke (2), and an armature (3), which is movable relative to the yoke (2), and also comprising a contact system consisting of a fixedly positioned switch piece carrier (4) having a movable switch piece carrier (5) arranged opposite thereto, wherein the movable switch piece carrier (5) is acted upon by a contact load spring (7). The invention is characterized in that a first means for electromagnetic contact load support is positioned on the fixedly positioned switch piece carrier (4).

A stackable electrical contact block includes a housing, the housing having a top and bottom side and accommodating a first and second electrical terminal, an actuation pusher adapted to move from a resting position to an actuated position to break the contact between the first and second terminals, the actuation pusher having a head protruding from the top side, a clearance below the actuation pusher, and a return spring biasing the actuation pusher towards its resting position, a bottom end of the return spring extending into the clearance. The housing's bottom side is a connection interface with an entrance providing access to the clearance. A central part of the clearance is taken up by the bottom end of the return spring, and a peripheral part is a space for receiving the actuation head of a component connected to the contact block via the connection interface.

A stackable electrical contact block includes a housing, the housing having a top and bottom side and accommodating a first and second electrical terminal, an actuation pusher adapted to move from a resting position to an actuated position to break the contact between the first and second terminals, the actuation pusher having a head protruding from the top side, a clearance below the actuation pusher, and a return spring biasing the actuation pusher towards its resting position, a bottom end of the return spring extending into the clearance. The housing's bottom side is a connection interface with an entrance providing access to the clearance. A central part of the clearance is taken up by the bottom end of the return spring, and a peripheral part is a space for receiving the actuation head of a component connected to the contact block via the connection interface.

A mobile contact-holder for a cutout includes a support in which there is formed a housing, a mobile element made of electrically conductive material mounted to slide, in a longitudinal axis of the support, in the housing of the support, an upstream electrical contact pad and a downstream electrical contact pad borne by the mobile element and a spring which exerts a return force on the mobile element. The support includes two oblong holes emerging in the housing and extending along its longitudinal axis. The mobile contact-holder also includes a guiding shaft which is fixed in translation with respect to the mobile element, which extends along an axis parallel to a transverse axis of the support and which is engaged in the oblong holes of the support. The guiding shaft engaged in the oblong holes guides the translation of the mobile element in the housing.

A splitter plate for an arc extinguishing chamber in a switching device, the splitter plate including a base portion; a pair of arms extending from the base portion; a recess for a movable contact defined between the arms; and a slot in each arm; wherein the recess is arranged between the slots. An arc extinguishing chamber for a switching device is also provided. A switching device for breaking an electric current, the switching device including a plurality of splitter plates or an arc extinguishing chamber is also provided.

A fusible disconnect switch includes a switch housing, and a first fuse contact member and a second fuse contact member coupled to the switch housing, each of the first fuse contact member and the second fuse contact member configured to engage and complete an electrical connection through an overcurrent protection fuse. The fusible disconnect switch further includes a switch contact including a parallel contact configuration. An interlock is operatively coupled to the first fuse contact member and a switch that operates the switch contact, the interlock configured to inhibit movement of the switch from the OFF position to the ON position when the first fuse contact member is unsecured to the switch housing, and inhibit movement of the first fuse contact member relative to the switch housing when the switch is in the ON position.

Fuse devices and electrical systems using the fuse devices are disclosed, with the fuse devices having internal components to cause a fuse blown event when the pre-determined current level is reached through the contacts. The internal components can comprise a levitation actuator that causes separation between one or more of the contacts as the current level approaches the predetermined level. This causes contact levitation and arcing, which increases the resistance at the contact being separated. This in turn causes the current through the contacts to seek another path that in the embodiments herein is a path to a pyro feature. The current activates the pyro feature, which causes the contacts to separate and puts the fuse device in “fuse blown” condition where currents can no longer flow through the contacts.

A system includes a mechanical switching device having a first moveable contact operatively connected to selectively contact a first static contact. A second moveable contact is operatively connected to selectively contact a second static contact that is electrically connected in parallel with the first static contact. The first and second moveable contacts are mechanically connected to each other to move between a closed circuit position and an open circuit position. The first moveable contact contacts the first static contact before the second moveable contact contacts the second static contact as the first and second moveable contacts move into the closed circuit position from the open circuit position. The first moveable contact disconnects from the first static contact after the second moveable contact disconnects from the second static contact as the first and second moveable contacts move from the closed circuit position into the open circuit position.

A system includes a mechanical switching device having a first moveable contact operatively connected to selectively contact a first static contact. A second moveable contact is operatively connected to selectively contact a second static contact that is electrically connected in parallel with the first static contact. The first and second moveable contacts are mechanically connected to each other to move between a closed circuit position and an open circuit position. The first moveable contact contacts the first static contact before the second moveable contact contacts the second static contact as the first and second moveable contacts move into the closed circuit position from the open circuit position. The first moveable contact disconnects from the first static contact after the second moveable contact disconnects from the second static contact as the first and second moveable contacts move from the closed circuit position into the open circuit position.

The electrical switch includes three fixed contacts and a rotatable knife contact being connected with a permanent electrical connection to a third one of the fixed contacts and including at least one pair of longitudinal blades. The rotatable knife contact connects in a first switching position only a first one and a third one of the fixed contacts electrically together, and in a second switching position only a second one and a third one of the fixed contacts. The rotatable knife contact connects further in a zero switching position the first, the second and the third fixed contact electrically together.