EP 0126984 B1 19870722 - ELECTRICAL INSULATOR HAVING AN INSENSITIVITY TO POLLUTION
Title (en)
ELECTRICAL INSULATOR HAVING AN INSENSITIVITY TO POLLUTION
Publication
Application
Priority
FR 8307100 A 19830429
Abstract (en)
[origin: US4563544A] An electrical insulator offering reduced sensitivity to pollution comprises a body of a glass or porcelain dielectric material with a semiconductor outside coating. This coating mainly consists of zinc oxide with at least one further metal oxide added to it to make its voltage-current characteristic non-linear, such that I=kV alpha where I is current, V is voltage, k and alpha are coefficients, and the value of alpha is between 20 and 50. The coating is between 0.05 and 0.5 mm thick. The further metal oxide is advantageously selected from bismuth, manganese, cobalt, chromium and antimony oxides.
IPC 1-7
IPC 8 full level
H01B 17/42 (2006.01); H01B 17/50 (2006.01); H01B 19/04 (2006.01)
CPC (source: EP US)
H01B 17/50 (2013.01 - EP US); H01B 19/04 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
US 4563544 A 19860107; AT E28533 T1 19870815; AU 2744184 A 19841101; AU 564892 B2 19870827; BR 8401989 A 19841204; CA 1250916 A 19890307; DE 3464983 D1 19870827; EP 0126984 A1 19841205; EP 0126984 B1 19870722; ES 287936 U 19851116; ES 287936 Y 19860616; FR 2545259 A1 19841102; FR 2545259 B1 19851227; JP H0247808 B2 19901023; JP S59207515 A 19841124; MX 158055 A 19881229; NO 164389 B 19900618; NO 164389 C 19900926; NO 841647 L 19841030; NZ 207972 A 19860711; ZA 843160 B 19850731
DOCDB simple family (application)
US 60267684 A 19840423; AT 84104677 T 19840426; AU 2744184 A 19840427; BR 8401989 A 19840427; CA 452824 A 19840426; DE 3464983 T 19840426; EP 84104677 A 19840426; ES 287936 U 19840427; FR 8307100 A 19830429; JP 8506784 A 19840426; MX 20118084 A 19840427; NO 841647 A 19840426; NZ 20797284 A 19840427; ZA 843160 A 19840427