• We will be performing upgrades on the forums and server over the weekend. The forums may be unavailable multiple times for up to an hour each. Thank you for your patience and understanding as we work to make the forums even better.

VFD for stair press fan making high pitched winding noise

Learn the NEC with Mike Holt now!
N

Nathan_F

New User
Location
Tampa
Occupation
Electrician
Total of 3 stairwells, specifically when the elevators are running the VFDs for the stair press fans makes a high pitched noise for the duration of the elevator moving, it could also be the Current Transformer in the VFD itself, hard to tell. Any clues on how to go about this?
 
Last edited:
PaulMmn

PaulMmn

Senior Member
Location
Union, KY, USA
Occupation
EIT - Engineer in Training, Lafayette College
Are the elevator shafts open to the stairwells?? Maybe air pushed out of the elevator shaft is pushing back against the SPFans.
 
You must log in or register to reply here.
Top