LLC «LADA Izhevsk», the town of Izhevsk, Udmurt Republic.

Implementation of a group soft start system for turbine compressors of PSD-V-G-125-10k-2 type. The system provides successive smooth acceleration to nominal speed of the two high-voltage synchronous motors with power of 1,5 MW and voltage rating of 10 kV. The soft start system is based on a unified three-phase thyristor voltage converter that controls the main energy flow supplied to the motor stator. The converter provides stator voltage and current limitation to a value required for jogless and smooth start.
The PSD-V-G-125-10k-2 type is one of the state-of-the-art representatives of the family of soft-start high-voltage converters designed and serially produced by CJSC «Automated systems and complexes». Among its numerous advantages the following ones can be distinguished: advantageous weight-size parameters; competitive price; high functionality and reliability due to taking special measures on protection and diagnostics of power electronic equipment.
Another improvement of the system is the use of a space-saving motor selection cell of YVD-200-10k-2EM type in the equipment configuration. The cell is intended for alternate switching between two motors and converter. The disconnect switches with remote electric-powered drive designed and produced at CJSC «Automated systems and complexes» are used instead of vacuum contactors that were used for the previous YVD product line. The disconnect switches provide visible break of power circuits and combine the functionality of switching and protective element.
Modernization of the existing line of high-voltage thyristor converters, development of the new lines and their integration at the plants both in Russia and abroad as well as relevant production and service rationalization is one of the top-priority focuses for CJSC «Automated systems and complexes».