Discussing the issue of measuring contact resistance of high voltage breakers

The article was published in the journal “Energetic”, №4 (2002). The issues of measuring contact resistances with low currents are discussed.

The article by Golubev V.P. et al. “Measuring contact resistances to direct current in electric equipment” [1] was published in the journal “Energetic” № 6 (2001).  The issue of electric current intensity, used for measuring contact resistances, is of great importance, because general switch to the currents recommended in the article will cost Energy industry of Russia several    dozens of millions of rubles.

It is known [2, p.75], that transient resistance of electrical connection is determined by the current flow lines constriction resistance in places of connection Rs and the resistance, caused by the presence of different oxide coating and contamination on the surface of contacts Rp.

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