Obraba oblike električnega stika
V procesu lomljenja in zapiranja električnega stika se v kontaktni reži pojavijo različni pojavi, kot so kovinski most, lok in iskrica
Električna tkanjer neposredno vpliva na življenjsko dobo električnih naprav,
Električna obraba neposredno vpliva na življenjsko dobo električnih naprav . Električna kontaktna električna obraba ima v bistvu dve vrsti, in sicer prenos kovin in izgubo tekočega mostu, ki se izgoreva z lokom . 1. Nastanek tekočega mostu in kontaktni kontaktni stik, ki je v celoti stik na začetek stika na začetek stika, ki se v celoti kontaktni stik Zmanjša, ko se kontaktni kontaktni številki zatečejo, da se prvi stik s kontaktnim kontaktnim časom zmanjša in kontaktni kontaktni številki. Gostota toka se je dramatično povečala, posledična toplota pa vzpostavi stik s kovinsko talino, kar tvori tako imenovano kovinsko kapljico tekočine . Kontakt še naprej odklopi kovinsko kapljico tekočine, ki tvori tekoči kovinski most, imenovan "tekoči most .
Due to the asymmetry of temperature distribution along the length of the liquid bridge, and the maximum value was close to the anode, therefore, to make metal liquid and shifting from anode to cathode. Practice shows that due to the effect of metal transfer of the liquid bridge, after many times of operation, the contact of anode due to the loss of metal forming pits, YinPole is formed by metal in acupuncture, bulge on contact surface. In low current electrical appliances (such as relay), liquid bridge to contact electrical wear has an important influence. 2. The arc of contact arc of contact corrosion is very serious, arc wear than liquid bridge caused by 5 ~ 10 times higher than that of metal transfer. When load current is more than 20 a, achieve hundreds or even thousands of Ann, the arc of high temperature, the Spet razdalja med stikom
usually have electric arc, coupled with strong metal steam heat, often blow out, liquid metal from the contact surface to splash around. This kind of grindingWear loss and small power arc is different, metal vapor deposition on the contact surface contact again probability has been reduced greatly, make contact Yin and anode were serious wear and tear, due to the anode temperature higher than the cathode, anode wear is more serious.
