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The parameters measured for a 220V/110V, 50 Hz, single-phase transformer are :
Self inductance of primary winding = 45 mH
Self inductance of secondary winding = 30 mH
Mutual inductance between primary and secondary windings = 20 mH
Using the above parameters, the leakage (Ll1 , Ll2) and magnetizing (Lm) inductances as referred to primary side in the equivalent circuit respectively, are
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- 5mH, 20mH and 40mH
- 5mH, 80mH and 40mH
- 25mH, 10mH and 20mH
- 45mH, 30mH and 20mH
Correct Option: B
Given, 220/110 v, 50 Hz
L1 = 45 mH,
L2 = 30mH M = 20 mH.
Leakage inductancy are,
LI1 = L1 – 2(m) = 45 – 2(20) = 5 mH
LI2 = L2 – 2(m) = 30 – 2(20) = 10 mH
But referred to primary,
LI2 = | - 2(20) | |||||
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2 |
= 120 – 40 = 80 mH