DOI 10.35776/MNP.2020.07.09
UDC 628.12+621.65

Usachev A. P.

Backup of a pump control system with a variable-speed drive

Summary

Providing for backup of a pump with a variable-speed electric drive in emergency modes of stopping the pumping unit at water and wastewater pumping stations is considered. Backup is ensured by switching the pump to operation «From mains» (without a variable-speed drive), or by switching on another pump to operation «From mains» with automatic throttling of the slide valve by pressure. Theoretical aspects and practical implementation of the proposed schemes are given. The above schemes of the automatic backup input have been tested in practice and provide for the solutions of many problems while using a variable-speed drive at pumping stations, first thing at heating pumping stations, where any interruption of heat carrier recycling is often unallowable.

Key words

backup of a pump with a variable-speed drive , automating throttling of a slide valve by pressure