Technology Request

Ref: 06 HU HUBU 0GXD

Date: 20/12/2006 14:38:44

Title: Extinction chambers or tubes for electric arcs, suitable for mast switches used to disconnect under tension of medium voltage transmission lines

Abstract: A Hungarian large scale company requires extinction chambers or tubes for electric arcs, suitable for mast switches, from manufacturers of medium voltage (24 kV) equipment. They want to complete the range of their products and to increase their competitiveness. The mast switch is actually able to disconnect a current of max. 50 A, in the branch circuits. The target is to disconnect a current of 400-630 A in the power supply lines, by means of extinction chambers or tubes.

Description: The company is dealing with the development and manufacturing of medium and high voltage equipment (transformer stations and open-air distributors), mast switches, cartridge fuses and serial terminals. In closed state, the air insulated mast switches are characterised by conduction current and disconnection capacity. At the overhead lines, the power supply lines can be switched off or disconnected by extinction chamber/tube type equipment. The nominal current is disconnected by an extinction chamber or tube. The primary advantage of the use of extinction chambers/pipes could be the completion of the range of products, because it might be even a decisive factor in case of tenders, depending on the type of invitations. It could result in an increased market presence and in an improvement of the competitiveness in comparison with the products offered by the competitors. Technical Specifications / Specific technical requirements: The company seeks extinction chambers or tubes for electric arcs to be mounted to equipment operating with open-air mast switches, to disconnect medium voltage transmission lines under tension. Required technical parameters: effective current interruption capacity of 400 A (possibly 630 A) at a medium voltage level of 24 kV and a switching number of min. 20.