I am in the process of converting a 3 phase mill to run on a single phase supply. I have 2 x VSDs that will do this nicely, but I have been warned by the VSD supplier not to start the mill before the VSDs have time to initialise.
The mill has main contact relays, or circuit breakers that run on 24v AC via a 240v transformer, so what I was thinking, is to supply the VSDs with 240V for around 5 seconds before initialising the other 240v AC rail. What I am looking for is the simplest circuit that I can build.
Any suggestions would be greatly appreciated.
Cheers
Dave
The mill has main contact relays, or circuit breakers that run on 24v AC via a 240v transformer, so what I was thinking, is to supply the VSDs with 240V for around 5 seconds before initialising the other 240v AC rail. What I am looking for is the simplest circuit that I can build.
Any suggestions would be greatly appreciated.
Cheers
Dave