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US 7,675,728 B2Granted
Fire safe arrester isolator
AssigneeCooper Technologies Company
InventorsJonathan Jay Woodworth, James A. Strong, David R. Miller
Life of this patent
Estimating the term…
Abstract
A housing encapsulating first and second terminals of a surge arrester disconnector becomes structurally weakened before activation of a disconnect device in the disconnector when the disconnector is exposed to heat, thereby preventing the disconnector from producing a projectile with a force sufficient to classify the disconnector as a hazardous material under Department of Transportation regulations.
Claims26
An arrester disconnector, comprising:
- a line terminal stud;
- a ground terminal stud;
- an electrical element disposed between the line terminal stud and the ground terminal stud;
- a disconnect cartridge having an activation temperature and disposed to disconnect at least one of the line terminal stud and the ground terminal stud when activated;
- and
- a housing that encapsulates at least a portion of the line terminal stud, the ground terminal stud, and the electrical element, wherein the line terminal stud, the electrical element, and the ground terminal stud encapsulated by the housing define a sealed chamber adjacent to the cartridge, wherein the housing becomes structurally weakened prior to activation of the cartridge when the disconnector is exposed to heat, and wherein the structural weakening of the housing destroys the sealed chamber.
3 more elements
A surge arrester assembly, comprising:
- a surge arrester;
- and
- a disconnector coupled to the surge arrester and configured to sever electrical connection of the surge arrester to ground, the disconnector comprising:
- a line stud;
- a ground stud;
- an electrical element disposed between the line stud and the ground stud;
- a disconnect cartridge having an activation temperature and disposed to disconnect at least one of the line stud and the ground stud from the disconnector when activated to thereby sever electrical connection of the surge arrester to ground;
- and
- a housing that encapsulates at least a portion of the line terminal stud, the ground terminal stud, and the electrical element, wherein the line terminal stud, the electrical element, and the ground terminal stud encapsulated by the housing define a sealed chamber adjacent to the cartridge, wherein the housing becomes structurally weakened prior to activation of the cartridge when the disconnector is exposed to heat, and wherein the structural weakening of the housing destroys the sealed chamber.
6 more elements
An arrester disconnector, comprising:
- a housing;
- and
- a disconnect cartridge having an activation temperature and disposed within at least a portion of the housing,
- wherein the housing defines a sealed chamber adjacent to the cartridge,
- wherein the housing comprises at least one material that becomes structurally weakened prior to activation of the cartridge when the disconnector is exposed to heat, and wherein the structural weakening of the housing destroys the sealed chamber.
2 more elements
Dependencies are inferred from the claim text.