electricguru
Electrical
If I know high and low legs from 3-phase 480vac transformer secondary to motor starter, can I determine phase angle of motor before startup?
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
phasing an a.c. motor before startup
- Thread starter electricguru
- Start date
- Status
jbartos
Electrical
- Jan 15, 2000
- 6,440
Suggestion: Please, clarify the "phase angle". If you mean a phase sequence ABC or ACB to establish a proper motor rotation, then an appropriate and consistent lead identification and a motor direction of rotation meter are recommended.
If your concern is proper roation on startup of an AC motor, try an Amprobe Model PRM-1 "phase sequence and motor rotation testor". It costs about $60 and will allow you to determine the phase sequence (rotation) of your line and then phase the leads of the motor for proper rotation before startup.
- Status
Similar threads
- Question
- Question