Patent ID: 8451076

Claim:
An electrical installation switching device comprising: a housing; a current path which runs in the housing between a first connecting point and a second connecting point; at least one first contact point including a first contact lever, the at least one first contact point being configured to at least one of open and close the current path; 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 when overcurrent tripping occurs; a switching mechanism including a tripping lever and a striking lever which is configured to be pivoted between a rest position and a trip position; and a first coupling rod configured to couple the switching mechanism operating element to the tripping lever, wherein the current path includes at least one second contact point which includes a second contact lever, wherein the second 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, which leads to rapid opening of the at least one second contact point, to act on the second contact lever due to interaction of flow of current in the current path with magnetic flux within the air gap, wherein the switching mechanism is configured to act, via a first operating connecting line, on the first contact lever to at least one of open the first contact point and keep the first contact point open, wherein, in the event of overcurrent tripping, the overcurrent release is configured to act through the switching mechanism and via a second operating connecting line on the switching mechanism to open the first contact point and keep the first contact point open, and wherein, in the event of short-circuit tripping, the second contact lever is configured to act, via a third operating connecting line, on the switching mechanism to keep the first contact point open.