Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1980-07-17
1982-03-16
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
337 34, 361127, H02H 104
Patent
active
043204368
ABSTRACT:
A secondary valve arrester for protection of secondary electrical systems, comprises a housing having a lid and base portion, the latter of which includes a plurality of compartments each of which is dimensioned to receive a valve block and spark gap assembly or a varistor assembly; the number of said assemblies included in the arrester corresponding to the number of phases protected in the system. Each said assembly includes connecting electrodes of similar construction, each connecting electrode having two offset male terminals and one offset female terminal for connection to externally connected lead wires or other connecting electrodes. The housing lid includes first and second rib sets for extension into the base portion to retain the said assemblies in a tightly stacked condition in respective compartments. When used in a relatively low voltage system, the arrester includes said assemblies of a predetermined thickness and the housing lid is received on the base in a first orientation to position a first rib set into alignment with the said assemblies. When used in a relatively high voltage system, the arrester includes said assemblies of a greater thickness and the housing lid is rotated 180.degree. such that a second, shorter rib set extends into respective compartments. Each said assembly also includes a spark gap electrode having a centrally located convex portion coated with a dielectric material to provide the arrester with an improved impulse spark over characteristic.
REFERENCES:
patent: 3987343 (1976-10-01), Cunningham et al.
Eisenzopf Reinhard J.
Gealow Jon Carl
LaPorte Ronald J.
MacKinnon Charles W.
McGraw-Edison Company
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