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.
Claims17
A vacuum interrupter, comprising:
- a first electrode assembly that comprises a first electrode and a first contact situated on the 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 as a circle, 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 at least a portion of the first contact, and
- wherein a second trench structure is formed in the first electrode assembly and is concentric with the first trench structure.
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 and a first contact situated on the 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 as a circle, 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 at least a portion of the first contact,
- wherein a second trench structure is formed in the first electrode assembly and is concentric with the first trench structure.
A vacuum interrupter, comprising:
- a first electrode assembly that comprises a first electrode and a first contact situated on the first electrode;
- a second electrode assembly that comprises a second electrode;
- a sidewall having a longitudinal axis;
- and
- a first trench structure formed as a circle in one of the first electrode assembly and the second electrode assembly, wherein the first trench structure has an opening that faces the other of the first electrode assembly and 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 one of the first electrode assembly and the second electrode assembly during arcing,
- wherein:
- the first electrode assembly is a moveable electrode assembly and comprises a bellows shield that surrounds at least a portion of the first contact;
- and
- the second electrode assembly is fixed, and
- wherein the first trench structure formed in the first electrode assembly, and wherein a second trench structure is formed in the first electrode assembly and is concentric with the first trench structure.
Dependencies are inferred from the claim text.