High-voltage high-breaking-capacity fuse
First Claim
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1. A quick-break fuse for use in a medium-voltage range and a low-voltage range, comprising:
- at least one fuse link formed as a fusible element;
mechanically operating means for disconnecting the fuse link and including a mechanical actuator operatively connected with the fuse link for disconnecting the same, and an energy accumulator for actuating the mechanical actuator;
electrically operating means for disconnecting the fuse link in the medium-voltage range and including a tripping wire for actuating the energy accumulator upon being melted through, the tripping wire melting through as a result of transfer of current thereto caused by a voltage drop at a first melting are within the fuse link-forming fusible element; and
thermally operating means for disconnecting the at least one fuse link in the low-voltage range and including a meltable element connected with the energy accumulator for actuating the same upon being melted by heat generated in response to an excess current which flows therethrough, wherein the tripping wire is formed as a resistance-indicator wire connected substantially in parallel with the fusible element.
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Abstract
A quick-break fuse including at least one fuse link formed as a fusible eent, a mechanical actuator operatively connected with the fuse link for disconnecting the same, an energy accumulator for actuating the mechanical actuator, a tripping wire for actuating the energy accumulator and which melts through as a result of transfer of current thereto caused by a voltage drop at a first melting within the fuse link-forming fusible element, and a meltable element connected with the energy accumulator for actuating the same upon being melted by heat generated in response to an excessive current which flows therethrough.
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Citations
52 Claims
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1. A quick-break fuse for use in a medium-voltage range and a low-voltage range, comprising:
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at least one fuse link formed as a fusible element; mechanically operating means for disconnecting the fuse link and including a mechanical actuator operatively connected with the fuse link for disconnecting the same, and an energy accumulator for actuating the mechanical actuator; electrically operating means for disconnecting the fuse link in the medium-voltage range and including a tripping wire for actuating the energy accumulator upon being melted through, the tripping wire melting through as a result of transfer of current thereto caused by a voltage drop at a first melting are within the fuse link-forming fusible element; and thermally operating means for disconnecting the at least one fuse link in the low-voltage range and including a meltable element connected with the energy accumulator for actuating the same upon being melted by heat generated in response to an excess current which flows therethrough, wherein the tripping wire is formed as a resistance-indicator wire connected substantially in parallel with the fusible element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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- 14. A fuse as claimed in 1, wherein the energy accumulator is located at an end of a star-shaped fusible element carrier.
Specification