Europaisches P a t e n t a m t
European Patent Office
© Publication number:
Office europeen des brevets
©
EUROPEAN
050
723
A3
PATENT
APPLICATION
© IntCI.3: H 01 C 7 / 1 2
H 01 T 5 / 0 4
© Application number: 81106859.2
@ Date of filing: 02.09.81
© Priority: 27.10.80 US 200931
©Applicant: GENERAL ELECTRIC COMPANY
1 River Road
Schenectady New York 12305(US)
© Date of publication of application:
05.05.82 Bulletin 82/18
© Date of deferred publication of search report: 27.04.83
© Designated Contracting States:
CH DE FR LI SE
0
© Inventor: Kresge, James Stanley
87 Mountain Drive
Pittsfield Massachusetts 01201 (US)
@ Inventor: Sakshaug, Eugene Clemens
Grove Avenue
Lanesborough Massachusetts 01237(US)
© Representative: Voigt, Reinhard, Dipl.-lng. et al,
Kaiserstrasse 41
D-6000 Frankfurt (Main) 1(DE)
© Grading means for high voltage metal enclosed gas insulated surge arresters.
© Capacitance grading is provided within gas insulated
lightning arresters (10) containing stacked zinc oxide varistors (14) by means of a grading ring (6) electrically connected
to the line terminal or, for arresters of the higher voltage
ratings, by means of a plurality of telescoping external
electrostatic shields (17-20). The shields (17-20) are arranged
/2, /3) between sequential
so that the degree of overlap
shields decreases from the line end to the ground end of the
varistor stacks. The capacitance grading is provided by the
degree of overlap (( (2, ( 3) between the sequential shields
(17-20) and the ratio of the radii (RB, RA) of the overlapping
shields.
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