EP 0795877 A2 19970917 - DC bushing
Title (en)
DC bushing
Title (de)
Gleichstromdurchführung
Title (fr)
Traversée à courant continu
Publication
Application
Priority
JP 5759096 A 19960314
Abstract (en)
A DC bushing (24) having an increased DC dielectric strength includes a porcelain tube (1) constituting a lower portion thereof and immersed in an insulating oil contained in a tank (11), a lower insulated shield (5) provided at a lower end portion of the porcelain tube (1) and composed of a shielding electrode (3) covered with an insulating cover (4), and a shield barrier (8) disposed around an outer periphery of the lower insulated shield (5) with an oil gap (7) being defined between the shield barrier (8) and the lower insulated shield (5). The thickness (W2) of the shield barrier (8) is greater than a width (W1) of the oil gap (7) as viewed in a direction widthwise thereof. Alternatively the shield barrier (9) is formed of a solid insulator having a higher volume resistivity than that of oil-impregnated paper or alternatively the shield barrier (8; 9) is realized in such a structure that upon application of a DC voltage, the proportion of the DC voltage to be borne by the shield barrier (8; 9) is higher than 15 % inclusive. <IMAGE>
IPC 1-7
IPC 8 full level
H01B 17/34 (2006.01); H01B 17/28 (2006.01); H01B 17/44 (2006.01)
CPC (source: EP)
H01B 17/28 (2013.01)
Designated contracting state (EPC)
DE SE
DOCDB simple family (publication)
EP 0795877 A2 19970917; EP 0795877 A3 19980916; EP 0795877 B1 20011205; CN 1075659 C 20011128; CN 1162183 A 19971015; DE 69708727 D1 20020117; DE 69708727 T2 20020829; JP 2771505 B2 19980702; JP H09251814 A 19970922
DOCDB simple family (application)
EP 97103464 A 19970303; CN 97103033 A 19970314; DE 69708727 T 19970303; JP 5759096 A 19960314