Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Patent
1998-06-17
1999-11-23
Gellner, Michael L.
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
338 48, 338 22R, 338101, 338115, 338 21, 338260, 338319, 361117, 361127, H01C 710
Patent
active
059907789
ABSTRACT:
The current-limiting resistor has two connection electrodes (1, 2) which are arranged parallel to one another, a resistance body (3) which has PTC behavior and with which large-area contact is made by the connection electrodes (1, 2) and at least one varistor (4) which is in electrically conductive contact with the resistance body (3). The varistor (4) is of pillar-shaped design and has at least two first portions (4a) routed predominantly perpendicularly to the varistor axis and, arranged between said portions, a second portion (4b) having a reduced cross section compared with each of the first portions (4a). The material of the resistance body (3) fills an interspace (6), which is formed by the at least two first portions (4a) and the second portion (4b), and encloses the outwardly pointing edges (4c) of the at least two portions.
This resistor can be operated at high voltages, for example 5 or 10 kV, and advantageously has a single resistance body 3 and a single varistor. This obviates metal electrodes serving to make electrical contact with subelements.
REFERENCES:
patent: 745077 (1903-11-01), Sherlock
patent: 946542 (1910-01-01), Garton
patent: 1734235 (1929-11-01), Slepian
patent: 2870307 (1959-01-01), Milliken et al.
patent: 2891194 (1959-06-01), McStrack et al.
patent: 3096496 (1963-07-01), Burrage
patent: 3328631 (1967-06-01), Greber
patent: 4451815 (1984-05-01), Sakshaug et al.
patent: 4686603 (1987-08-01), Mosele
patent: 5313184 (1994-05-01), Greuter et al.
patent: 5379022 (1995-01-01), Bacon et al.
Kuhlefelt Jan H. W.
Strumpler Ralf
ABB Research Ltd.
Easthom Karl
Gellner Michael L.
LandOfFree
Current-limiting resistor having PTC behavior does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current-limiting resistor having PTC behavior, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current-limiting resistor having PTC behavior will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1226422