By the use of intelligent operation in make and break process of ac contactors, the contacts erosion will be reduced, which lengthens causes the electrical durability of the contactor.

As a branch of intelligent low voltage apparatus, the recent achievement in study of this field was introduced. The method and approach of the intelligent make and break operation were analyzed.

Its structure simple, the ease of operation, the switch nimble, the make and break safe, time-saving reduces effort, the production efficiency is high.