![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhreqiakvVi464sJ3RinzF1jI4cdXSp_4_GOMFNHx-uo5qCK0UVfXOXG2Wv9UtzthSMYBKWvwiv4ddN8yQujni_NFCIvQFiUXqKm9pogBBjjLP0vyYmSlBcAXodZPvX1DKcmNaReS_AkI-u/s320/VECTOR+GROUP+TEST0003.bmp)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgSu8aUsNsWuoc7Gkn7Ty1ErZpkqWBl3oSlDF7zVpSNAc0kPqphM6nNxvDGsu-eK7ZZByvB42acdihtKQYAk3lybDQ2JFcVOxkgSvO9COgeHdXYnFoFBTs1gPv18PUOOoaTPouw_gxNV1V/s320/VECTOR+GROUP+TEST0002.bmp)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsXDrqZS7QtHSBflpk_QvH9Th7P5Gdb_-1WJIkz_5ZGpXQf5eZQIkm_7FUFQ1yeTsAkIQpKSv-jtPLNM_RTA8iVUI4VGzh6Ib97F4M9F49RomVm61SsP60oOHU_GBnK9kBjwTEYJJDKSxQ/s320/VECTOR+GROUP+TEST0001.bmp)
The vector group test is importent test in the transformer testing
The Test procedure
1. Connect the HV side "R" phase with LV side " R" phase. ( No need for Auto transformer )
2. Apply the 3 Phase voltage (380v) on HV side.
3. Measure the voltages in various combination on both side of the transformer ( HV- LV ).
4. For each vector group need diffrent type of voltage combination to conform the vector group ( refer drawings ).
For more information