Overcurrent protection device
AssigneeSiemens Aktiengesellschaft
InventorWerner Kohler
Life of this patent
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Abstract
The invention concerns an overcurrent protection device which comprises contacts adapted to operate in dependence on the current. The set of contacts are arranged in a vacuum vessel, with one of the contacts guided movably via an actuator rod through an end wall of the vessel, while the other is secured to the opposite end. The moving rod cooperates with a latching device, which holds the contact in the open position. The latching device is designed so that it can be released when desired. If an overcurrent occurs, the contacts are separated by electrodynamic forces and are secured in the separated position by the latching device. After release of the latching device, the overcurrent protection device is again ready for use.
Claims7
An overcurrent protection device comprising:
- a vacuum vessel;
- a terminal member fixedly mounted with respect to said vacuum vessel;
- a pair of contact pieces arranged in said vacuum vessel;
- at least one of said contact pieces being mounted so as to be movable with respect to said terminal member and with respect to the other one of said contact pieces between first and second positions whereby said contact pieces are closed and opened respectively;
- contractible circuit means serially and mechanically connected between said terminal member and said one contact piece for contracting in response to an overcurrent passing therethrough thereby acting on said one contact piece to move the same from said first position to said second position;
- latching means for latching said movable contact piece when the same is moved to said second position thereby preventing the closing of said contact pieces;
- and
- releasing means for releasing said latching means thereby allowing said contact pieces to close.
Dependencies are inferred from the claim text.