What types of transformer tests are there?

Answer 1

there are various types of trasformer tests are here

Open Ckt test

Short ckt test

IR value test

Vector group test

Phase sequence test

Magnetizing test

turn ratio test

T/f oil insulation breakdown test

and so on............

Answer 2

see the following:

http://ezinearticles.com/?Testing-a-Transformer--How-To-Accurately-Test-A-Transformer&id=56803 http://en.wikipedia.org/wiki/Transformer

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The main transformer test is known as the hi-pot test. It is where a high potential voltage is imposed on the Transformers winding for a specific amount of time. If there is no break down in the insulation factor the transformer passes the test.

Answer 3

Testing of Transformers The structure of the circuit equivalent of a practical transformer is developed earlier. The performance parameters of interest can be obtained by solving that circuit for any load conditions. The equivalent circuit parameters are available to the designer of the transformers from the various expressions that he uses for designing the transformers. But for a user these are not available most of the times. Also when a transformer is rewound with different primary and secondary windings the equivalent circuit also changes. In order to get the equivalent circuit parameters test methods are heavily depended upon. From the analysis of the equivalent circuit one can determine the electrical parameters. But if the temperature rise of the transformer is required, then test method is the most dependable one. There are several tests that can be done on the transformer 1.Winding resistance test 2 Polarity Test 3 Open Circuit Test 4 Short Circuit Test 5 Load Test contact me for more details

Answer 4

There are a number of tests that may be performed. As a minimum you should perform: TTR (Turns Ratio) at all tap positions Insulation Resistance (Megger) - PI is recommended but if small transformer at least a DAR. This is widing-winding, winding- ground, and core-ground (if ground strap is accessible) Power Factor test is recommended, both windings and any liquid filled bushings Excitation Current Test is recommended Take an oil sample and send to reputable lab for analysis.

Answer 5

transformor polarity test are used two know about the poalrity of a trasformor .for these purpose to traansformor are used and his low voltage winding and high volatage winding are coonected in parallel to each other the secondry windings of a transformor which has commonly high voltage winding fuse are coonnected to his secondry side of a transformor a man point to be noted here that a wire used for fuse are so small rating similarly when the polarity of atransformor same no current will be flow as a reason the dont blow.otherwise when the polarit are different the current wiill be flow and fuse will be blow out