PHASE DESIGNATION
PHASE DESIGNATION
(OP)
We have the following requirement for phase designation for tranmission S/S :
The phases in all new substations shall be designated as R (Red), Y (Yellow) and B (Blue) throughout the substation when viewed from East to West, from North to South and from Top to Bottom. For MV switchgears phase conductors when viewed from operating side, the phase designation shall be R, Y, B from left to right, from front to back and from top to bottom.
Is there any other standard or practice for phase designation (I do not want for power transformer as we have IEC/IEEE for that)
Thanks
The phases in all new substations shall be designated as R (Red), Y (Yellow) and B (Blue) throughout the substation when viewed from East to West, from North to South and from Top to Bottom. For MV switchgears phase conductors when viewed from operating side, the phase designation shall be R, Y, B from left to right, from front to back and from top to bottom.
Is there any other standard or practice for phase designation (I do not want for power transformer as we have IEC/IEEE for that)
Thanks






RE: PHASE DESIGNATION
Phase A-B-C, left to right, top to bottom, and front to rear, as viewed from the front. (A-B-C would relate to R-Y-B).
NEMA also requires that units conforming to above be clearly identified as such.
Rafiq Bulsara
http://www.srengineersct.com
RE: PHASE DESIGNATION
RE: PHASE DESIGNATION
Rafiq Bulsara
http://www.srengineersct.com
RE: PHASE DESIGNATION
RE: PHASE DESIGNATION
RE: PHASE DESIGNATION
The rules in the NEC don't really seem to mean anything based on this proposal for the 2011 code.
Don
RE: PHASE DESIGNATION