How to test the transformer capacity
If the temperature rise of a transformer is less than 55 degrees, it can be considered to achieve the design capacity.
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As the temperature rise test time is long, the customer can not track the whole process, some bad transformer manufacturers in which mischief, cut corners, made the transformer can not reach the design capacity.
Generally, the same method as the short-circuit impedance test is used to test the temperature rise. The secondary side of the transformer is short-circuited and the voltage is applied once, and the secondary current reaches the rated value. Wait until the transformer temperature changes less than 1 degree / hour later, and then maintain 3 hours, this time the transformer temperature rise is the final test value.
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Temperature test is the main means of testing the transformer capacity.
Its purpose is to assess the transformer in the rated load working state or overload working conditions, the thermal state of the transformer and so on.
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