Patent · US Expired

Electrical stress control

US6124549A · kind A · utility

31Cited by

10References

25Claims

0Family size

Inventors

Christian F. Kemp · Bonn, DE
Georg Bachmaier · Birkenfeld, DE
Hansjoerg Gramespacher · Niederrohrdorf, CH

Key dates

Filing date	Sep 17, 1998
Grant date	Sep 26, 2000
Priority date	—
Expiry date	Sep 17, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31699
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A composition for use as an electrical stress controlling layer (12) for use with cable joints and terminations has a non-linear V-I characteristic. The composition comprises a polymeric matrix filled with doped zinc oxide varistor powder. The particulate filler is sieved at 125 micrometers, calcined at 1100.degree. C., and lightly ground to maintain the spherical shape of the particles. More than 50% by weight of the particles have a maximum dimension between 5 and 100 micrometers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.