The fight for ecological solutions is lead in every technical field. Until 30 years ago, the challenge in the field of power switching apparatus was the interrupting currents and voltages increasing. Nowadays it is important to maintain the same technical performances but to use ecological constructive solutions. In low and medium voltage (up to 36 kV) the switching in vacuum is an ecological very good solution, but it raises technical and technological difficulties. For the low voltage contactors the replacement of the Ag-CdO contact material with Ag-SnO2 is the recommended ecological solution. The paper presents some of the authors’ results obtained in the construction of ecological low voltage interrupters and contactors.
Ecological Solutions for Power Switching Apparatus
AUTHORS: Smaranda NIȚU, Dan PAVELESCU, Paula ANGHELIȚĂ, Magdalena LUNGU, Ștefania GAVRILIU
PRESENTED AT: Proc. of the IEEE Conference EUROCON 2009, 18-23 May 2009