Contact and nozzle wear from 100 interruptions for a puffer-type air load break switch
Journal article, Peer reviewed
Published version
Permanent lenke
http://hdl.handle.net/11250/2457681Utgivelsesdato
2017Metadata
Vis full innførselSamlinger
- Publikasjoner fra CRIStin - SINTEF Energi [1633]
- SINTEF Energi [1757]
Sammendrag
One type test requirement for medium voltage load break switches is to interrupt 100 consecutive "mainly active loads". A puffer-type switch with axial-blown arc has been tested according to the 630 A/24 kV ratings. The nozzle and contact wear were measured regularly to investigate design requirements and the impact from nozzle wear on gas flow. The contact wear is only moderate, while the nozzle wear causes a decrease in pressure build-up, which in turn may influence the interruption performance.