Transformer check of vector group

The purpose of this series of tests is to check the polarity and the phase relationship of the multiple windings in a transformer. The test is carried out simultaneously with the transformer turns ratio test when using a turns ratio test set. In order to define the connection of a three-phase transformer and to facilitate the parallel connection with other transformers,the international standards prescribe specific vector groups. Every country has its own designation for the vector groups.IEC and IEEE (in USA) have recommended a method that will result in standardized and fully defined designations.

Kingrun handheld model JYT transformer turns ratio tester is much popular which can test three phase and neutral point simultaneously.Suitable to test the ratio from distribution transformer to 1,000kV transformers, CT, PT and transformers with Y,D and Z connection.