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US 4,228,478 AGranted
Overvoltage arrester
AssigneeSiemens Aktiengesellschaft
InventorsWerner Jakszt, Klaus Reichelt, Gert Schiele
Life of this patent
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Abstract
An overvoltage arrester wherein the arrester comprises an insulating housing which encloses a body of cast resin in which is embedded a voltage dependent resistor and a first connecting device, a portion of which protrudes from the resin body and extends out of the housing. The arrester is further provided with a spark gap formed as a separate unit and a second connecting device anchored to the spark gap, both of the latter elements also being disposed in the housing.
Claims3
An overvoltage arrester for use in protecting machines and transformers comprising:
- an insulating housing;
- a voltage dependent resistor in said housing;
- a first connecting device connected to said resistor and having a protruding portion which extends out of said housing;
- a spark gap, formed as a separate unit, disposed in said housing, and having an outer diameter which corresponds to the inner diameter of the housing, said spark gap comprising a body of hardened cast resin in which a plurality of electrodes, a plurality of spacer washers arranged between said electrodes, and another connecting device are embedded;
- and
- a body of resin cast in said housing and on said spark gap in which said resistor body of a portion of said first connecting device are embedded.
3 more elements
Dependencies are inferred from the claim text.