Service switching device with double-break contacts
An electrical switching device comprises a contact point having two double-break contacts, a contact link having a width, a contact pressure spring exerting a pressure on the contact link, a striker pin configured to act on the contact link counter to the pressure of the contact pressure spring during a switch-off operation so as to move the contact link into an open position, and a thruster actuatable by a switching mechanism and configured to guide the striker pin, the thruster having two limbs projecting in the same direction towards a free end of the thruster so as to form a slot there between, wherein a distance between the two limbs tapers towards the free end such that the distance at the free end is smaller than the width of the contact link, so that the contact link is clamped between the two limbs during the switch-off operation.
1. An electrical switching device comprising:
a contact point having two break-contacts;
a contact link having a width;
a contact pressure spring exerting a pressure on the contact link;
a striker pin configured to act on the contact link counter to the pressure of the contact pressure spring during a switch-off operation so as to move the contact link into an open position; and
a thruster actuatable by a switching mechanism and configured to guide the striker pin, the thruster having two limbs projecting in a same direction towards a free end of the thruster so as to form a slot therebetween, wherein the contact link is received in the slot, wherein a distance between the two limbs tapers towards the free end such that the distance at the free end is smaller than the width of the contact link, so that the contact link is clamped between the two limbs during the switch-off operation.
2. The electrical switching device as recited in claim 1 , wherein the two limbs are elastic.
3. The electrical switching device as recited in claim 2 , wherein the first limb and the second limb are bent towards one another towards the free end.
4. The electrical switching device as recited in claim 3 , wherein the two limbs form a V-shape in the region of the free end.
5. The electrical switching device as recited in claim 1 , wherein the contact link is unclamped from between the two limbs by a further downward movement of the thruster.
6. The electrical switching device as recited in claim 5 , further comprising a web or a journal and wherein the contact link rests on the web or the journal in a switch-off position, such that the further downward movement of the thruster unclamps the contact link from between the two limbs.
7. The electrical switching device as recited in claim 5 , further comprising a spring, wherein the further movement of the thruster unclamps the contact link from between the two limbs.