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Water and Energy International
Year : 2022, Volume : 65r, Issue : 3
First page : ( 50) Last page : ( 57)
Print ISSN : 0974-4207. Online ISSN : 0974-4711.

Understanding Percentage Impedance (%Z) of Transformer with Examples

Dr. Arora Rajesh Kumar1

1Delhi Transco Ltd (DTL), Delhi, India.

Online Published on 19 July, 2022.


The transformer, being a key element in the transmission and distribution of electrical energy, understanding its specified parameters is of utmost importance for power engineers. The most important design parameter of the transformer is the percentage impedance % Z (Leakage Impedance).

This paper provides information about the significance of percentage impedance of transformer & discusses the methods of measurement of percentage impedance of transformer.



Power Transformer, Percentage Impedance (%Z), Leakage Flux, Resistance and Reactance of Transformer.


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