Motor starting voltage dip (MV)
Motor starting voltage dip (MV)
(OP)
I am performing a motor starting study on a 2000 HP motor (4.16 kV), I wonder how much bus voltage dip is allowed in general?
As I remember, NEMA recommendations that the motor terminals voltage during starting shall not dip beyond 85%, what about other connected auxiliary loads? MV/LV Transformers supplying BOP loads? 10%?
As I remember, NEMA recommendations that the motor terminals voltage during starting shall not dip beyond 85%, what about other connected auxiliary loads? MV/LV Transformers supplying BOP loads? 10%?






RE: Motor starting voltage dip (MV)
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Motor starting voltage dip (MV)
if you want to be on the safe side no more than 10%, aux no more than 3%.
Moreover, check the motor's torque curve and the load curve.
RE: Motor starting voltage dip (MV)
ITIC curve can be helpful for electronic equipment against the acceleration time of the motor.
RE: Motor starting voltage dip (MV)
It's been posted here a long time ago. Here's the LINK.
RE: Motor starting voltage dip (MV)
BTW, the definition of F should read: F = the maximum available faukt "MVA" not "current".
RE: Motor starting voltage dip (MV)