Vacon Oyj

Vacon Oy

Honeywell Acs

Ahti Rauma

Stefan Strandberg

Jaakko Ollila

Shekhar Kubal

Brian Michael Morris

Pasi Alapeltola

Ulf Backman

Method and arrangement for connecting an AC electric motor (M, M, . . . M) to an AC electricity network (L) in a system which comprises a frequency converter (FC), with which the motor is started, and contactors (S, S, S, S, S, S), in which method the supply source is changed by means of the contactors from the frequency converter to a direct network supply, in which method the frequency converter is stopped before changing the supply source, and in which method in connection with changing the supply source the control of the contactors is started before stopping the frequency converter.

Connection of an electric motor to a supply network

Growing community of inventors

Vaasa, Finland

Ahti Rauma