Title :
Overheating of flexible tinned copper connectors
Author :
Braunovic, Milenko
Author_Institution :
MB Interface, Montreal, Que., Canada
fDate :
9/1/2001 12:00:00 AM
Abstract :
Overheating of flexible tinned copper connectors has been observed at a number of power stations. These connectors are used to connect the generator to outgoing busbars and transformers thus serving to counter the effects of vibration and thermal expansion forces. It is shown that the main cause for the observed overheating is a result of a combined action of the high initial contact resistance, fretting, stress relaxation, differential thermal expansion and the formation of intermetallics at the copper-tin interfaces
Keywords :
busbars; contact resistance; electric connectors; power transformers; stress relaxation; thermal expansion; wear; differential thermal expansion; flexible tinned copper connectors; fretting; initial contact resistance; intermetallics; outgoing busbars; overheating; power stations; stress relaxation; thermal expansion forces; transformers; vibration; Connectors; Contact resistance; Copper; Counting circuits; Power generation; Thermal expansion; Thermal force; Thermal resistance; Thermal stresses; Transformers;
Journal_Title :
Components and Packaging Technologies, IEEE Transactions on
DOI :
10.1109/6144.946484
