EXPERIENCE IN THE DEVELOPMENT, PRODUCTION AND USE SOFT STARTERS SERIES RUPP

The goal of paper is problem direct start-up of AC motors. In this paper given description of negative effect, which will by happen in electromotor and drive mechanism which direct start-up. Indicated a possible way to solve this problem for the most popular applications of AC motors. Also, this paper review series of soft starters which has passive elements. Different that device from other devices in the market is simpler construction, more life time, can work in practice whatever operation condition, very low cost and no need service. Indicated results of tests on the objects of the implementation and analysis of the results.