What is the purpose of testing a transformer?
Table of Contents
What is the purpose of testing a transformer?
Transformer testing is done for maintaining the specifications and performance of an electrical power transformer. The transformer is the main part of an electrical generation/distribution system so if it is not working properly then it will affect the whole generation/distribution system.
Why is a vector group test important?
The vector group indicates the phase difference between the primary and secondary sides, introduced due to that particular configuration of transformer windings connection. The Determination of vector group of transformers is very important before connecting two or more transformers in parallel.
What is vector group Test in transformer?
A vector group is the International Electrotechnical Commission (IEC) method of categorizing the high voltage (HV) windings and low voltage (LV) winding configurations of three-phase transformers. The vector group designation indicates the windings configurations and the difference in phase angle between them.
What is the special test of transformer?
The insulation resistance test of transformer is carried out by the megger, so it is also known as megger test of transformer. This test is performed to ensure the healthiness of the overall insulation of the transformer. Step 1 – Disconnect the all line and neutral terminals of the transformer.
What is the importance of phasor groups in three-phase transformers?
The three-phase transformer can be connected in various ways and the transformer’s connection is determined using its vector group. The transformer’s vector group is depending on the following factor: Removing harmonics: The star winding of the three-phase transformer is used to reduce third harmonics.
Why polarity test is necessary for a transformer?
We do polarity test on parallel transformers to ensure that we connect the same polarity windings and not the opposite ones. If we accidentally connect the opposite polarities of the windings, it will result in a short-circuit and eventually damage the machine.