A 500 MW, 21 kV, 50 Hz three phase two pole alternator has 0.8 lagging p.f. with moment of inertia of 27.5×103 kgm-2. The inertia constant H will be _______ MJ/MVA.

A 500 MW, 21 kV, 50 Hz three phase two pole alternator has 0.8 laggin

1.	A 500 MW, 21 kV, 50 Hz three phase two pole alternator has 0.8 lagging p.f. with moment of inertia of 27.5×103 kgm-2. The inertia constant H will be _______ MJ/MVA.
A.	2.17
B.	4.2
C.	2.82
D.	2.62
Answer» B. 4.2

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