Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1990-10-16
1993-06-15
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361 56, 361 91, H02H 320
Patent
active
052204804
ABSTRACT:
A surge arrester for mounting on a transformer having two line-potential terminals and a neutral terminal. The arrester includes two high energy, low voltage metal oxide varistor disks, each MOV disk having one side connected to an electrode that is electrically connected to one of the line-potential terminals and having the other side of the MOV disks electrically connected to a neutral electrode that is electrically connected to the neutral terminal of the transformer. The MOV disks shunt any current surge to ground upon the application of a predetermined voltage across the disks. In the preferred embodiment, the electrodes and MOV disks are housed within a thermoplastic elastomer housing filled with a potting compound of a resilient elastomeric material. The potting compound completely insulates and seals the electrical connections and MOV disks. Further, the materials of the housing and potting compound are resilient so as to easily vent gases formed during short circuit within the arrester and thereby prevent fragmenting.
REFERENCES:
patent: 3778743 (1973-02-01), Matsuoka et al.
patent: 4345290 (1982-08-01), Johnson
patent: 4604673 (1986-08-01), Schoendube
patent: 4809124 (1988-03-01), Kresge
patent: 4864456 (1989-09-01), Thuillier et al.
General Electric Publication, "Tranquell Secondary Arrester Protect Your Electrical Equipment Against Damage by Lightning" (1983).
General Electric Publication, "Home Lightning Protector" (1972).
McGraw Edison Publication, "Surge Arresters, Storm Trapper Secondary Voltage Arresters" (1980).
Goedde Gary L.
Kershaw, Jr. Stanley S.
Schettler Robert N.
Cooper Power Systems, Inc.
Jackson S.
Maag Gregory L.
Pellinen A. D.
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