Copper nickel alloy e na le matla a fokolang a motlakase, e thibelang mocheso hantle ebile e sa bola, e bonolo ho sebetsa le ho chesetsoa ka loto. E sebelisetsoa ho etsa likarolo tse ka sehloohong ho relay overload ea mocheso, mocheso o tlaase oa ho hanyetsamohatelli oa potoloho, le lisebelisoa tsa motlakase. Hape ke thepa ea bohlokoa bakeng sa mohala oa ho futhumatsa motlakase.