TURA-03 series turn ratio meters can test turns ratio by making only a one-time connection to transformers and automatically test all phases. TURA-03 series turn ratio testers can make automatic vector group detection and calculate ratio error. Tura-03 series turn ratio testers are very easy to use with the 7-inch display and user-friendly interface.
The three-phase transformer comprises three separate single-phase transformers with shared limbs, each representing a phase consists of primary and secondary windings. The primary or secondary windings are connected in one of several ways. The most common configurations are the star, delta, and Zigzag. The phase angle between the high voltage and the low voltage windings varies between 0o and 360 o. The vector group is the method of categorizing the high voltage HV windings and low voltage LV windings configurations of three phase transformers . The vector group of a transformer is presented as follow: Fig.1. Vector Group Representation THE IMPORTANCE OF THE TRANSFORMERS VECTOR GROUP DETECTION. The transformers vector group identification (Y-Y, Delta-Y, Delta-Delta… etc.) is an essential [...]
The magnetic balance test is a most commonly used proactive test is performed only on three-phase transformers to detect the faults in the core and to verify the imbalance in the magnetic circuit also to identify inter-turn faults in the transformer at the early stage of manufacturing work. HOW DO WE TEST TRANSFORMER MAGNETIC BALANCE? Transformer Magnetic Balance Test Procedures: 1. Keep the transformer Tap Changer in an ordinary position. 2. Apply a single-phase AC voltage on one of the terminals of the HV winding. 3. Measure the voltage between the two other HV terminals. 4. Repeat the test for each of the three phases. Left side phase Central phase Right side phase AN BN CN Voltage applied at [...]