Transformer tapping arrangement and methods of operation of same
OwnerMin CHENinventor
Life of this patent
Estimating the term…
Abstract
A tapping arrangement for a transformer, the arrangement comprising a plurality of fixed contacts, a movable rotary contact, a transition rotor with pairs of transition contacts, an interrupter coupling assembly and driving motor(s) are compacted into a single vacuum chamber
Claims29
A tapping arrangement for a transformer, the arrangement comprising a plurality of fixed contacts and a movable rotary contact upon a main axle, the movable rotary contact movable to engage an original fixed contact and a destination fixed contact upon the main axle by lifting, rotation and depression of the main axle using a lift mechanism, a transition rotor arm associated with the main axle and arranged to rotate with the movable rotary contact, the transition rotor arm having two ends with transition contacts in a pair arranged to engage in turn as the rotor end rotates the original fixed contact, and to bridge the original fixed contact and the destination contact with a transition contact of the pair engaging each and then the destination fixed contact only during a tap change-over, the transition contacts connected through at least one transition resistor.
(canceled)
10-19. (canceled)
21-24. (canceled)
An arrangement as claimed in claim 11 wherein the plurality of electrical resistors are electively switchable by switching means into combinations to vary the combined electrical resistance in use.
An arrangement as claimed in claim 13 wherein the by-pass circuit has an indicator for electrical load.
30-33. (canceled)
A method of tapping with regard to a transformer whereby an electrical connection between an original fixed contact and a moveable rotary contact is broken by lift of the movable rotary contact on a main axis and such lift also displaces a transition rotor arm with a transition rotor at an end such that transition contacts in a pair of transition contacts rotate upon the transition rotor with rotation of the movable rotary contact to a destination fixed contact whereby the pair of transition contacts are configured so that one transition contact is in contact with the original fixed contact at the start of rotation and then the pair of transition contacts bridge the original fixed contact and the destination fixed contact with a respective transition contact engaging on each fixed contact and then through further rotation only the destination fixed contact is engaged by the transition contacts whereupon the movable rotary contact is located above the destination fixed contact and the rotary contact is forced into engagement with the destination fixed contact, there being provided a transition electrical resistance between the transition contacts to take an electrical load when the fixed contacts and the moveable contact are not in conductive engagement with each other.
(canceled)
A tapping arrangement for a transformer, the arrangement comprising a plurality of fixed contacts and a movable rotary contact upon a main axle, and the movable rotary contact electrically connected by a link coupling the main coupling electrically connected to the link coupling and the link coupling extending to a collar in electrical contact with a slip ring, the collar and slip ring concentric about the main axle and arranged to slip past each other in use, the slip ring in electrical contact with the moveable rotary contact.
(canceled)
An arrangement as claimed in claim 16 wherein the slip ring has a channel or rail to ensure location of the collar and/or ensure electrical connection.
An arrangement as claimed in claim 16 wherein the collar and the slip ring have intermediate connectors between them to facilitate electrical connection.
An arrangement as claimed in claim 16 wherein the intermediate connectors have roller bearings or ball bearings or a conductive belt.
An arrangement as claimed in claim 16 wherein the intermediate connectors are arranged in compression between the slip ring and the collar.
44-65. (canceled)
Dependencies are inferred from the claim text.