On-load tap changer according to the reactor switching principle

Patent metadata

Field	Value
Publication number	US-10147563-B2
Application number	US-201515104762-A
Country	US
Kind code	B2
Filing date	Jan 12, 2015
Priority date	Jan 28, 2014
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

The invention relates to an on-load tap changer (2) according to the reactor switching principle for uninterrupted load switching between different tap windings of a tapped transformer (1), comprising: —an inductor (3) which is designed as an inductive transition reactance; —the inductor (3) being part of the on-load tap changer (2).

First claim

The invention claimed is:

1. In an on-load tap changer according to the reactor switching principle for uninterrupted load switching of a phase between different winding taps of a tapped transformer, the improvement comprising:
a choke constructed as an inductive switching inductance for the phase, mounted on the on-load tap changer, and connected to and having the same voltage potential relative to ground as the on-load tap changer, the on-load tap changer being either a load selector or the combination of a tap selector with a load-changeover switch.

2. The on-load tap changer defined in claim 1 , wherein, when the on-load tap changer is a load selector, the choke is mounted to an upper end or to a lower end of the load selector.

3. The on-load tap changer defined in claim 1 , further comprising, when the on-load tap changer is a load-changeover switch and a tap selector, the choke is mounted to an upper end or to a lower end of the load-changeover switch or to an upper end or to a lower end of the tap selector.

4. The on-load tap changer defined in claim 3 , further comprising:
an iron core extending through and between the load-changeover switch and the tap selector, the choke being mounted on the iron core between the load-changeover switch and the tap selector.

5. The on-load tap changer defined in claim 2 , wherein the on-load tap changer is at an upper part of a transformer housing.

6. The on-load tap changer defined in claim 2 , further comprising
an insulating foot at a lower part of a transformer housing and carrying the choke and the load selector.

Assignees

• Reinhausen Maschf Scheubeck

Inventors

• Kaltenborn Uwe
• Bieringer Alfred
• Hammer Christian
• Pircher Christian
• Sachsenhauser Andreas
• Schuster Thomas

Classifications

• H01F27/06

  Mounting, supporting or suspending transformers, reactors or choke coils {not being of the signal type} · CPC title

• H01F29/04

  having provision for tap-changing without interrupting the load current · CPC title

• H01F27/08

  Cooling (heat-transfer elements F28F); Ventilating (structural details of casings H01F27/02) · CPC title

• H01H9/0044 Primary

  Casings; Mountings; Disposition in transformer housing · CPC title

• H02P13/06

  by tap-changing; by rearranging interconnections of windings · CPC title