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Month: August 2023
Temperature Rise Test of Transformer
Introduction A temperature rise test of a transformer is an important test that should be included in any type test of an oil transformer. In this test, we check whether the temperature rising limit of the transformer winding and transformer oil is as specified by...
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Commissioning of Power Transformer
In our technical article this week, we will talk about the commissioning of the power transformer. After, installation of power transformer, several pre-commissioning tests to be done before putting the transformer in service. Along with different pre-commissioning tests, different instruments associated to the transformer also...
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Dry Type Transformer Percent Impedance Definition
Introduction The percent impedance is the percent voltage required to circulate rated current flow through one transformer winding when another winding is short-circuited at the rated voltage tap at rated frequency. %Z is related to the short circuit capacity of the transformer during short circuit...
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Hysteresis Eddy Current Iron or Core Losses and Copper Loss in Transformer
[caption id="attachment_6431" align="aligncenter" width="529"] Fig. 1 Hysteresis Curve[/caption] As the electrical transformer is a static device, mechanical loss in transformer normally does not come into picture. We generally consider only electrical losses in transformer. Loss in any machine is broadly defined as difference between...
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CASE STUDY 5 – Effect of Using Paper Insulated & Enameled HV Wires
1600 kVA 33/0,4 kV Dyn11 Tier-2 Losses Al Winding Transformer LV Foil & HV Paper Insulated & Enameled Wire
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