Ok guys your suggestions have been taken onboard.
Most of the fans that are causing the problems are fin-fan units of various sizes, and I agree that the air wastage is ridiculous - but the plant had been designed and built when I arrived, so its try and improve whats here.
Having reviewed our...
Thanks guys - all the feed back is greatly appreciated.
ElectricPete - the mechanical device of pawl /ratchet was the idea that I was considering myself Any manufacturers names ? Cannot see why we cannot try them on a fan motor shaft if I can find a maker !!
We are on a massive petrochem site...
Has anyone had experience with anti-windmilling devices fitted to motor shafts ? We are having serious problems with standby fans running in reverse when duty fans are on. Then if standby fan is called for the starting / braking current created trips the crrent protection on overcurrent.
Any...
Thanks for the feed back guys - most appreciated by us on remote site !! We are ordering 1 of each type that have been recommended and see how it works out.
Now Closed
Thanks Edison123
Some of the drives that we are away to commission are upto 6000 kw so after all the alignments are in place don't think its good practice to upset the "heavy spanner brigade"
by asking them to split the drive couplings again !!
I have heard that there is a test set available...
Can anyone recommend a tester that can be used on any 3 phase system motor, prior to startup, so that wrong phase direction and rotation of shaft is eliminated ??
