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| Arc Erosion of Silver-Based Alloy Electrical Contact Materials at 50Hz and 400Hz |
| Li Jing1, 2, Ma Zhiying1, Li Jianming2, Huang Shaoping2 |
| 1. Xi'an Jiaotong University Xi'an 710049 China 2. Hunan Institute of Engineering Xiangtan 411101 China |
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Abstract The values of arcing characteristics and the welding force of the Ag-based electrical contact material at 50Hz and 400Hz are introduced during the electrical contact current make-and-break test under low voltage, resistive load, small current by a developed ASTM contact material experimental system of small-capacity and variable frequency. By electricity-ray analytical balance, SEM and EDAX, the changes of the contact material weighing, the surface profile and micro-area constituent of AgNi, AgC and AgW contact materials are obtained and analysed.Study indicates that on the condition of low voltage, small current at 400Hz, the welding resistance and anti-burning of three kinds of silver-based materials—CAgC4, CAgW50 and CAgNi10—are all superior to the capacities at 50Hz. The capacities of arc erosion resistance of the silver-based alloys electrical contract materials whose second elements are different at 400Hz. Among them, the splash of CAgC4 is the most serious and it has the worst anti-erosion ability, the ability of CAgNi10 is second, the ability of CAgW50 is the best.
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Received: 25 February 2010
Published: 04 March 2014
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2010, Vol. 25 
