Dairyspark
Member
Hi everyone
Fitted some big agricultural fans this week and one of the guys when back to adjust the louvres to direct the air. Both fans are controlled by VSD’s and one controller, instead of turning them off at the controller he just switch them off whilst running, which to me is always a bad idea…anyway…the vsd’s are now dead, breaker trips as soon as you try and start the fans.
This has happened a couple of times before on other pieces of equipment running of different types of VSD’s where they’ve been running and then turned off at the isolator or breaker and then they’re just dead.
Why does this happen and will the same thing occur during a power cut?
Thanks![Smiling face :relaxed: ☺️](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/263a.png)
Fitted some big agricultural fans this week and one of the guys when back to adjust the louvres to direct the air. Both fans are controlled by VSD’s and one controller, instead of turning them off at the controller he just switch them off whilst running, which to me is always a bad idea…anyway…the vsd’s are now dead, breaker trips as soon as you try and start the fans.
This has happened a couple of times before on other pieces of equipment running of different types of VSD’s where they’ve been running and then turned off at the isolator or breaker and then they’re just dead.
Why does this happen and will the same thing occur during a power cut?
Thanks
![Smiling face :relaxed: ☺️](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/263a.png)