Question

Calculate resistance fo primary winding of single phase transformer using any digital meter

Answer 1

Answer:

Actually to measure the resistance offered by the primary coil we have to measure the total impedance of that primary coil by dividing the primary side voltage by the primary current at the no load condition. Z1= V1/I1. The inductive reactance XL = 2πfL. The inductance is measured by LCR meter.

Explanation:

Answer 2

Resistance Using Digital meter

Explanation:

• This will give an answer with at least 90%+ accuracy for normal transformers. First, measure the primary voltage and current with no load. Then calculate Z=V/I. Assuming minimal DCR and assuming Z is due only to inductive reactance of primary, solve XsubL=6.28 × 60 × L for L. Assumes 60hz AC line, otherwise adjust accordingly
• This method assumes than X is much greater than R, which is typically true.There exists such a thing as an LCR meter. They’re more expensive than your run of the mill multimeter, but they measure inductance with a test signal that cuts human error out of the math