Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Reexamination Certificate
2005-10-18
2005-10-18
Vortman, Anatoly (Department: 2835)
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
C337S265000
Reexamination Certificate
active
06956459
ABSTRACT:
A blown fuse proximity sensing device40is for use with a rectifying wheel37of a type including rectifying diodes38and associated fuses42. Each fuse42may include a housing51, a fuse element52carried by the housing, and a pop-out indicator54movable between a normal position and a popped-out position. In the popped-out position, the indicator54extends outwardly from the housing responsive to failure of the fuse element. At least one stationary proximity sensor44is mounted adjacent the rectifying wheel37for sensing positions of the pop-out indicators54without contact therewith during rotation of the rectifying wheel to thereby sense at least one blown fuse. The sensing device40may also include a local display61, and a controller68connected to the stationary proximity sensor44for generating an indication of a blown fuse on the local display. The controller68may also generate at least one remote output, such as to be monitored by other plant control equipment.
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Ferraz Shawmut, British Standard URE/URS/URT, “Semiconductor Protection Fuses”, pp. D108-D110.
Ferraz Shawmut, EURO/IEC Fuses & Accessories gF, gl-gG, aM, “Cylindrical Fuse-Links”, p. F2-F10.
Banthia Anand
Lau James F.
Siemens Westinghouse Power Corporation
Vortman Anatoly
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