| 摘要 |
A high voltage circuit interrupter has a surface modified pulverulent ar c- 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 b e selected from the group of silicas and silicates, preferably sand, mica or quartz. Th e 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, an d a modified pulverulent arc-quenching filler material inside the casing, in close proximity to the fuse element. The modified pulverulent arc-quenching filler material include s 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.</SDO AB>
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