Avèk devlopman rapid nan endistri Lachin ekipman elektrik, eleman yo kontak elektrik lajman ki itilize nan ekipman elektrik tankou pouvwa ak sistèm kominikasyon . measure contact performance of contact resistance is a basic and important parameters, directly affect the contact electrical contact behavior is good or bad. Contact the contact resistance is too high, will produce larger temperature rise, even welding phenomena occur, both affect contact work reliability, and reduce the service life of the contact. And contact resistance research has become the key problem in the contact reliability testing, and often to contact resistance to measure the Nivo fyab nan sistèm kontak ", yo nan lòd yo kontakte rezistans depase yon sèten valè espesifye kòm kritè prensipal la nan echèk eleman kontak .
Cattle contact resistance refers to a pair of contact resistance of contact area when I touch each other. It consists of shrinkage on the surface of the touch point contact resistance and the resistance of surface film.Two contact contact with each other, due to the contact surface can't be done very ideal, contact the actual contact area is composed of many conductive spots, current, flows through these several conductive spots scattered, shrinkage occurs, Kontakte rezistans nan rezistans a ki rele Rezistans . Sifas kontak pa rezon ki fè nan polisyon, korozyon chimik, pòv ka fòme yon kouch nan materyèl kondiktè (ki gen ladan patikil pousyè, abrasif rezidyèl oswa ajan polisaj, òganik ak manbràn inòganik, elatriye .
