Vacuum interrupter with trap for running cathode tracks
AssigneeEaton Intelligent Power Limited
InventorsWangpei Li, Xin Zhou
Life of this patent
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Abstract
A vacuum interrupter having a structure to trap running cathode tracks is disclosed. The interrupter includes a first electrode assembly and a second electrode assembly, at least one of which is moveable. The interrupter also includes a sidewall having a longitudinal axis. One or more trench structures are formed in at least one of the electrode assemblies. Each trench structure has an opening that faces the other electrode assembly in a direction that is parallel to the longitudinal axis, to trap the running cathode tracks to prevent them from getting close to the sidewall.
Claims20
A vacuum interrupter, comprising:
- a first electrode assembly that comprises a first electrode;
- a second electrode assembly that comprises a second electrode;
- a sidewall having a longitudinal axis;
- and
- a first trench structure formed in the first electrode assembly, wherein the first trench structure has an opening that faces the second electrode assembly in a direction that is parallel to the longitudinal axis, to trap an arc from running along an edge of the first electrode assembly during arcing,
- wherein:
- the first electrode assembly is a moveable electrode assembly and comprises a bellows shield that surrounds the first electrode;
- and
- the first trench structure is formed in the bellows shield.
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A hybrid direct current (DC) switch, comprising:
- a DC interrupter;
- and
- a vacuum interrupter electrically connected in parallel with the DC interrupter, the vacuum interrupter comprising:
- a first electrode assembly that comprises a first electrode,
- a second electrode assembly that comprises a second electrode,
- a sidewall having a longitudinal axis, and
- a first trench structure formed in the first electrode assembly, wherein the first trench structure has an opening that faces the second electrode assembly in a direction that is parallel to the longitudinal axis, to trap metal depositions from running along an edge of the first electrode assembly during arcing, wherein:
- the first electrode assembly is a moveable electrode assembly and comprises a bellows shield that surrounds the first electrode;
- and
- the first trench structure is formed in the bellows shield.
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Dependencies are inferred from the claim text.