Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1995-07-28
1999-12-21
Donovan, Lincoln
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337276, H01H 8538
Patent
active
060054700
ABSTRACT:
A high voltage circuit interrupter has a surface modified pulverulent arc-quenching filler composition, with gas-evolving material is bound to the surfaces of the arc-quenching filler by a binder. The pulverulent arc-quenching filler can be selected from the group of silicas and silicates, preferably sand, mica or quartz. The gas-evolving materials can be selected from the group of melamine, cyanuric acid, melamine cyanurate, guanidine, guanidine carbonate, guanidine acetate, 1,3-diphenylguanidine, guanine, urea, urea phosphate, hydantoin, allantoin, and mixtures and derivatives thereof. The device has a generally tubular casing of electrically insulating material, terminal elements closing the opposite ends of the casing, at least one fuse element conductively interconnecting the terminal elements, a core for supporting the fuse element, extending parallel to the longitudinal axis, and a modified pulverulent arc-quenching filler material inside the casing, in close proximity to the fuse element. The modified pulverulent arc-quenching filler material includes a pulverulent arc-quenching filler, a binder, and a gas-evolving material, and the gas-evolving material is bound to the surfaces of the arc-quenching filler.
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Crooks William R.
Shea John J.
Smith James D. B.
Donovan Lincoln
Eaton Corporation
Moran Martin J.
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