Transient voltage surge suppression module with ultrafast fusing

Details Transient voltage surge suppression module with ultrafast fusing Transient voltage surge suppression module with ultrafast fusing

1993-08-19

1996-01-30

DeBoer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361111, 361127, H02H 904

Patent

active

054885345

ABSTRACT:
A transient voltage surge suppressor (100) for use in a single or poly-phase power distribution network to protect equipment supplied power from the network from damage caused by line surges or transients. A plurality of surge suppression assemblies (102A-102G) each of which includes a plurality of semiconductors (114) connected in parallel and a fuse wire (118) connected in series with each semiconductor. Each assembly is mounted on a separate circuit board (126A-126G). A fault detection circuit (104) in each assembly includes both a sensor (132A-132G) for sensing when a semiconductor in one of the surge suppression assemblies fails, or when a fuse wire in one of the assemblies clears, and a circuit (152) for providing a visual indication thereof. The fault detector is mounted on a separate circuit board (131). The respective circuit boards are installed in a module (120) with the one set of circuit boards on which the surge suppression assemblies are mounted being installed in one plane, and the circuit board on which the fault detector is mounted being installed perpendicular to them. A plasma suppression medium includes a sand and epoxy material for preventing spread of a plasma produced when a semiconductor fails or a fuse wire clears. The sand and epoxy material fill the module including the spaces between the circuit boards to prevent the spread of any plasma created due to semiconductor failure or fuse wire clearing.

REFERENCES:
patent: 4223366 (1980-09-01), Sweetana et al.
patent: 4271446 (1981-06-01), Comstook
patent: 4498119 (1985-02-01), Cronin
patent: 4554607 (1985-11-01), Mora
patent: 5010438 (1991-08-01), Brady

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