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Case study: True dynamic resistance measurement

Case study: True dynamic resistance measurement

Pinpointing concealed problems inside a resistive-type OLTC before physical inspection - the application of true DRM.

A maintenance team at the Electric Power Transmission Network in the City of Karbala performed routine electrical tests on a transformer including: winding resistance measurements (WRM), transformer turns ratio (TTR), short circuit impedance (SCI), excitation current, and line-frequency power factor (a.k.a. dissipation factor or tan delta). This case study looks into their investigations and their results.

 

 

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