US 11,688,569 B2Granted

Three-position disconnector switch

AssigneeABB Schweiz AG

InventorsMichal Skuci, Josef Cernohous, Radek Javora, Tomas Kozel

Life of this patent

Estimating the term…

Loading patent…

Abstract

A switch includes a power in contact, a piston, a power out contact, a plurality of flexible locking elements, an earthing contact, and a threaded rod. In a first position, the piston contacts the power in contact and the power out contact. In a second position, the piston contacts the power out contact. In a third position, the piston contacts the earthing contact and the power out contact. The piston comprises an inner threaded section that engages the threaded rod. Rotation of the threaded rod moves the piston along an axis of the switch between the different switch positions. The piston comprises a groove extending in a direction parallel to the axis. Each of the flexible locking elements is configured such that a part of each of the flexible locking elements moves into and out of the groove as the piston is moved along the axis of the switch.

Claims20

Dependent claims

A three-position disconnector switch, comprising:

a power in contact;
a piston;
a power out contact;
a plurality of flexible locking elements;
an earthing contact;
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 in contact and the power out contact;
wherein 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, and wherein in the second switch position the outer surface of the wall of the piston makes an electrical contact with the power out contact;
wherein the length of the piston is such that in a third switch position the outer surface of wall of the piston makes an electrical contact between the earthing contact and the power out contact;
wherein the piston comprises an inner threaded section configured to engage with the threaded rod, and wherein rotation of the threaded rod is configured to engage with the inner threaded section to move the piston along an axis of the switch between the different switch positions;
wherein the piston comprises a groove extending in a direction parallel to the axis;
wherein each of the flexible locking elements is configured such that a part of each of the flexible locking elements moves into and out of the groove as the piston is moved along the axis of the switch between the different switch positions as the piston is moved in both directions along the axis;
wherein, as the piston is moved along the axis the switch is configured such that there is always a part of at least one flexible locking element in the groove;
and
wherein when a part of at least one flexible locking element is in the groove the piston is constrained from rotating about the axis.

13 more elements

A device, the device being a low voltage, medium voltage or high voltage switchgear, or a control gear, the device comprising one or more three-position disconnector switches, each of the one or more disconnector switches comprising:

a power in contact;
a piston;
a power out contact;
a plurality of flexible locking elements;
an earthing contact;
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 in contact and the power out contact;
wherein 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, and wherein in the second switch position the outer surface of the wall of the piston makes an electrical contact with the power out contact;
wherein the length of the piston is such that in a third switch position the outer surface of wall of the piston makes an electrical contact between the earthing contact and the power out contact;
wherein the piston comprises an inner threaded section configured to engage with the threaded rod, and wherein rotation of the threaded rod is configured to engage with the inner threaded section to move the piston along an axis of the switch between the different switch positions;
wherein the piston comprises a groove extending in a direction parallel to the axis;
wherein each of the flexible locking elements is configured such that a part of each of the flexible locking elements moves into and out of the groove as the piston is moved along the axis of the switch between the different switch positions as the piston is moved in both directions along the axis;
wherein, as the piston is moved along the axis the switch is configured such that there is always a part of at least one flexible locking element in the groove;
and
wherein when a part of at least one flexible locking element is in the groove the piston is constrained from rotating about the axis.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/740,876Filed 10 May 2022
Priority: EP 2117395614 May 2021
Published: US 2022/0367132 A117 Nov 2022
Granted: 27 Jun 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H01H 1/365
By sliding: bridging contacts
H01H 31/026
Details: movable parts and contacts mounted thereon
H01H 3/264
Using dynamo-electric motor: using a travelling nut mechanism
H01H 31/003
Air-break switches for high tension without arc-extinguishing or arc-preventing means: earthing switches