Tripping device for a circuit breaker
AssigneeSiemens Energy Global GmbH & Co. KG
InventorsThomas Hilker, Gunnar Lutzke, Rudolf Groth
Life of this patent
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Abstract
A trip device for a power circuit breaker has a trip element, a trip circuit with a trip coil, which, when energized, is configured to effect a movement of the trip element, and at least one electrical delay element, which can be connected to the trip circuit and reduces the rate of a rise in a current flowing in the trip coil once the trip circuit has been closed and/or delays a rise in a current flowing in the trip coil once the trip circuit has been closed.
Claims18
1-15. (canceled)
A tripping device for a circuit breaker, the tripping device comprising:
- a tripping element;
- a tripping circuit having a tripping coil being configured, upon being energized, to effect a movement of said tripping element;
- and
- at least one electrical delay element being able to be connected to said tripping circuit and reducing a steepness of a current increase of a current flowing in said tripping coil after said tripping circuit has been closed and/or delays the current increase of the current flowing in said tripping coil after said tripping circuit has been closed.
A method for increasing a tripping time of a tripping device for a circuit breaker, the tripping device having a tripping element and a tripping circuit with a tripping coil being configured, upon being energized, to affect a movement of the tripping element, which comprises the step of:
- connecting at least one electrical delay element to the tripping circuit for reducing a steepness of a current increase of a current flowing in the tripping coil after the tripping circuit has been closed and/or delays the current increase of the current flowing in the tripping coil after the tripping circuit has been closed.
Dependencies are inferred from the claim text.