Abb Research Ltd.

Abb Technology Ltd

Abb Schweiz Ag

Petter Nilsson

Lars E Jonsson

Stefan Valdemarsson

Tommy Larsson

Robert L Hirt

Hans Johansson

Mats Carlsson

Lars Johnsson

A retrofit diverter switch which has a mechanical and electrical interface that is compatible with the existing designs is provided. The diverter switch may include a vacuum switch. The feature where the mechanical and electrical interface is compatible enables a retrofit from traditional On Load Tap Changers to a vacuum based on Load Tap Changers. The diverter switch may be retrofitted into existing tap changer housings. Retrofitting from traditional to vacuum based, traditional to vacuum based and up rating, and vacuum up rating may be possible. Also, the diverter switch may include modular components that allow for easy customization of the diverter switch for different applications.

Vacuum based diverter switch for tap changer

A diverter switch with an operating member and an electric circuit. The electric circuit has a main branch and a resistance branch connected in parallel with the main branch. Each branch includes a contact and a vacuum switch. The resistance branch also includes a resistance. The main rotary selector contact is always operated before the resistance contact. The operating member is arranged, during operation, always to rotate the main contact in one and the same direction of rotation. Also a corresponding method for operating a diverter switch and use of such a switch.

Diverter switch, a method for operating such a switch and use of such a switch

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Ludvika, Sweden

Petter Nilsson