Patent ID: 8461947

Claim:
An electrical installation switching device comprising: a housing; a current path which runs in the housing between a first connecting terminal and a second connecting terminal; at least one contact point including a stationary contact piece and a moving contact piece, the at least one contact point being configured to at least one of open and close the current path; a contact lever through which at least part of the current in the current path flows and which is provided with the moving contact piece of the at least one contact point; an electromagnetic short-circuit current release including a magnetic circuit with an air gap; an overcurrent release including a switching mechanism operating element which is configured to change from a rest position to a trip position in the event of overcurrent tripping; and a switching mechanism including a striking lever which is configured to be pivoted between a rest position and a trip position, wherein the contact lever is arranged at least partially in the air gap in the magnetic circuit to cause, in the event of a short circuit, an electrodynamic force effect based on an interaction between flow of the current and a magnetic flux within the air gap, the electrodynamic force effect causing rapid opening of the at least one contact point, on the contact lever, wherein the switching mechanism is configured to act, via a first operating connecting line, on the contact lever to at least one of open the at least one contact point and keep the at least one contact point open, wherein, in the event of overcurrent tripping, the overcurrent release is configured to act, by means of the switching mechanism and via a second operating connecting line, on the switching mechanism to open the at least one contact point and keep the at least one contact point open, wherein, in the event of short-circuit tripping, the contact lever is configured to act, via a third operating connecting line, on the switching mechanism to keep the at least one contact point open, and wherein the contact lever is in the form of a moving contact link having two moving contact pieces which are configured to interact with two stationary contact pieces to form two contact points.