US 12,009,163 B2
Three-position disconnector switch
Radek Javora, Hrusovany u Brna (CZ); Dietmar Gentsch, Ratingen (DE); Josef Cernohous, Jamne nad Orlici (CZ); Michal Skuci, Trencianske Stankovce (SK); Tomas Kozel, Brno (CZ); and Kai Gorlt, Ratingen (DE)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Dec. 20, 2021, as Appl. No. 17/556,240.
Application 17/556,240 is a continuation of application No. PCT/EP2020/066077, filed on Jun. 10, 2020.
Claims priority of application No. 19181787 (EP), filed on Jun. 21, 2019.
Prior Publication US 2022/0115195 A1, Apr. 14, 2022
Int. Cl. H01H 1/62 (2006.01); H01H 31/00 (2006.01); H01H 31/26 (2006.01)
CPC H01H 31/003 (2013.01) [H01H 1/62 (2013.01); H01H 31/26 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A three-position disconnector switch, comprising:
an earthing contact;
a power out contact;
a power in contact;
a piston; and
a threaded rod,
wherein:
a length of the piston is such that in a first switch position an outer surface of a wall of the piston makes an electrical contact between the power out contact and the power in contact,
the length of the piston is such that in a second switch position the outer surface of the wall of the piston does not make an electrical contact with either the earthing contact or the power in contact,
the length of the piston is such that in a third switch position the outer surface of the wall of the piston makes an electrical contact between the earthing contact and the power out contact,
the piston comprises a first inner threaded section configured to engage with the threaded rod, wherein a length of the first inner threaded section is less than the length of the piston,
rotation of the threaded rod is configured to engage with the first inner threaded section to move the switch between different switch positions, and
the wall of the piston comprises one or more holes extending in a substantially radial direction, and wherein the piston is configured such that air can flow into the piston in an axial direction and flow out of the one or more holes, or such that air can flow into the piston through the one or more holes and out in an axial direction.