US 12,068,089 B2
Dry-type plug-in bushing, manufacturing method of the same, and high-voltage installation comprising same
Dong Suk Hong, Dangjin-si (KR); Jeong Ki Park, Seoul (KR); Jae Hyuk Song, Dangjin-si (KR); Seong Jung Kim, Gunpo-si (KR); and Woo Ju Shin, Dangjin-si (KR)
Assigned to TAI HAN ELECTRIC WIRE CO., LTD., (KR)
Appl. No. 17/599,971
Filed by TAI HAN ELECTRIC WIRE CO., LTD., Anyang-si (KR)
PCT Filed Mar. 3, 2020, PCT No. PCT/KR2020/002989
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/204363, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 10-2019-0036904 (KR), filed on Mar. 29, 2019.
Prior Publication US 2022/0172865 A1, Jun. 2, 2022
Int. Cl. H01B 17/24 (2006.01); B29C 39/02 (2006.01); H01B 17/26 (2006.01); H01B 17/58 (2006.01); H01B 19/00 (2006.01); B29L 31/34 (2006.01)
CPC H01B 17/24 (2013.01) [B29C 39/02 (2013.01); H01B 17/26 (2013.01); H01B 17/586 (2013.01); H01B 19/00 (2013.01); B29L 2031/3412 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A plug-in bushing comprising:
a conducting body disposed at a center of the bushing;
a resin insulating body cast in a form surrounding an outer circumference of the conducting body;
an electric field control electrode made of a semi-conducting synthetic resin material, coupled to an upper end of a lower support fitting, and used as an electrode for controlling an electric field;
the lower support fitting connected to an outer circumference of a lower portion of the resin insulating body;
an injected insulating body produced by an insert injection comprising an outer circumference of the resin insulating body and the electric field control electrode, and having a plurality of fins formed thereon for ensuring a leakage distance;
a stress cone connected to a lower end of the resin insulating body and having an insulating material and a semi-conducting material combined therein, wherein the lower support fitting comprises a flange and a metal pipe connected to the flange, and a molding material injection part passing through the flange and the metal pipe is formed in the lower support fitting; and
a molding groove that is constant in a circumferential direction is formed in a predetermined area of a portion in which the lower support fitting contacts the resin insulating body.