Installation switching apparatus having an exhaust air duct and a set screw
AssigneeABB Schweiz AG
InventorErwin Muders
Life of this patent
Estimating the term…
Abstract
An installation switching apparatus includes: a housing; at least one contact point; an exhaust air duct which in an upstream portion thereof receives arc gases of a switching arc that has been created at the at least one contact point, and by way of an exhaust air opening in a housing wall of the housing in a downstream portion of the exhaust air duct the exhaust air duct releases the arc gases into an environment of the housing; at least one thermal release; and a set screw for setting the at least one thermal release. The set screw at an activation end thereof has a formed element for contacting in a form-fitting manner a tool for rotating activation of the set screw. An operative end of the set screw is coupled to the at least one thermal release.
Claims5
An installation switching apparatus comprising:
- a housing;
- at least one contact point;
- an exhaust air duct which in an upstream portion thereof is configured to receive arc gases of a switching arc that has been created at the at least one contact point, and by way of an exhaust air opening in a housing wall of the housing in a downstream portion of the exhaust air duct the exhaust air duct is configured to release the arc gases into an environment of the housing;
- at least one thermal release;
- and
- a set screw configured to set the at least one thermal release,
- wherein the set screw at an activation end thereof has a formed element configured to contact in a form-fitting manner a tool configured for rotating activation of the set screw,
- wherein an operative end of the set screw is coupled to the at least one thermal release, and
- wherein the activation end of the set screw is located in the downstream portion of the exhaust air duct and is accessible through the exhaust air opening for activation by the tool.
Dependencies are inferred from the claim text.