Transformer Turns Ratio Meters
Transformer turns ratio (TTR) is a test to help determine that the transformer has the correct primary turns to secondary turns ratio. This test can help to detect faulty transformer windings, such as open windings, improper winding connections, and shorted turns, as well as defective tap changer positions. The excitation current and phase angle between the primary and secondary windings also provides additional information regarding the winding condition. The rugged and portable units from HAEFELY are ideal for acceptance testing and on-site maintenance testing of transformers according to IEEE, IEC, and ANSI standards.