Совершенствование схемы электроснабжения и защиты двухскоростных асинхронных приводов

Abstract

The paper offers the new circuit of connections of the dual-speed asynchronous motor of the high power 6-10 кV, used by power stations and others enterprises, allowing to reduce capital investments for creation of more rational power supply circuit, and also to improve reliability of ground faults protection and at its outputs terminals at the expense of parallel connection of zero-sequence current transformers, and also to restrict the appearing overvoltages by connecting the corresponding restraining voltage device to the motor output terminals.