A 10 kVA, 400/200 V, 1-phase transformer with 2% resistance and 2% leakage reactance. It draws steady short circuit current at angle of
While conducting open circuit test and short circuit test on a transformer, status of low-voltage and high-voltage windings will be such that in
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While conducting testing on the single phase transformer, one of the student tries to measure the resistance by putting an ammeter across one terminal of primary and other to secondary, the reading obtained will be
If the per unit leakage impedance for the primary of a transformer is ‘x’ on the given rated base value. If the voltage and volt-amperes are doubled, then the changed per unit impedance will be
The efficiency of two identical transformers under load conditions can be determined by
While estimating voltage regulation of a transformer, keeping
A 200/400 V single phase transformer has leakage impedance z= r+jx. Then we can expect magnitude of load pf of ____ at zero voltage regulation.
If the pu impedance of a single phase transformer is 0.01+j0.05, then its regulation at p.f. of 0.8 lagging will be
The transformer phasor diagram under the short circuit can be identified as
A transformer has resistance and reactance in per unit as 0.05 and 0.09 respectively. Its voltage regulation at full load for 0.8 power factor lagging and leading will be
19 videos|90 docs|25 tests
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19 videos|90 docs|25 tests
|