DocumentCode :
158865
Title :
Welding behavior of vacuum interrupters equipped with CuCr contact material caused by making and breaking operations under short circuit current interruption
Author :
Gentsch, Dietmar ; Gorlt, Kai
Author_Institution :
ABB AG Calor Emag Mittelspannungsprodukte GmbH, Ratingen, Germany
fYear :
2014
fDate :
Sept. 28 2014-Oct. 3 2014
Firstpage :
481
Lastpage :
484
Abstract :
Vacuum interrupter (VI) especially with high short-circuit interruption ability are mostly equipped with copper-chromium contact material. Especially for short circuit current making and breaking operations the contact material is based on CuCr-25...50 wt.-% in most of the cases by applying transverse magnetic field (TMF) or axial magnetic field (AMF) contact systems worldwide and multipurpose application. The study is carried out on standard VIs as well as optimized micro added elements and chemical compounds contact material equipped with TMF contact system. The contact material is based on the well-known solid state sintered material production technology. A large number of making operations under short circuit current conditions are done to investigate the welding forces. The welding forces especially after the making operation were measured by tensile test under dynamic condition. The statistic effect how the welding force develops is also being presented. Characteristics of the fractured surfaces and at the cross section were investigated by using light microscope, scanning electron microscopy (SEM) and the energy dispersive X-ray (EDX).
Keywords :
chromium alloys; copper alloys; magnetic fields; short-circuit currents; tensile testing; vacuum interrupters; welding; AMF contact systems; CuCr; EDX; SEM; TMF contact system; VI; axial magnetic field; breaking operations; chemical compound contact material; contact material; copper-chromium contact material; dynamic condition; energy dispersive X-ray; fractured surfaces; light microscope; making operation; optimized microadded elements; scanning electron microscopy; short circuit current interruption; solid state sintered material production technology; statistic effect; tensile test; transverse magnetic field; vacuum interrupters; welding behavior; welding forces; Force; Interrupters; Short-circuit currents; Solids; Standards; Welding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Discharges and Electrical Insulation in Vacuum (ISDEIV), 2014 International Symposium on
Conference_Location :
Mumbai
Print_ISBN :
978-1-4799-6750-6
Type :
conf
DOI :
10.1109/DEIV.2014.6961724
Filename :
6961724
Link To Document :
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