bdf5526
Electrical
- Nov 26, 2007
- 51
Hi. I am doing vector group and ratio check on the 33kva, double secondary winding tx. The tx name rating as follows.
Primary: 21kv (delta)
1st Secondary : 6kv (star)
2nd Secondary 2: 4.7kv (star)
Vector group: Dyn1 - y1
For vector group test, when I applied 400V with phase A on primary and phase a' on secondary connected, I measured all the reading required and the vector group was correct. I measured the phase rotation as well. It was clockwise as primary. I did the same method for the Secondary winding no.2 as well. The phase rotation and vector group again was correct. (thanks for the previouse post in this site on vector group)
Now as per my understanding,if the vector grop is correct the phase rotation on secondary must be the same as primary. Am I correct?
Primary: 21kv (delta)
1st Secondary : 6kv (star)
2nd Secondary 2: 4.7kv (star)
Vector group: Dyn1 - y1
For vector group test, when I applied 400V with phase A on primary and phase a' on secondary connected, I measured all the reading required and the vector group was correct. I measured the phase rotation as well. It was clockwise as primary. I did the same method for the Secondary winding no.2 as well. The phase rotation and vector group again was correct. (thanks for the previouse post in this site on vector group)
Now as per my understanding,if the vector grop is correct the phase rotation on secondary must be the same as primary. Am I correct?