Question: A 3 phase Star connected synchronous generator is rated at 15 kVA, 400V, 50Hz. If rated load at 0.8 pf lagging is supplied where

A 3 phase Star connected synchronous generator is rated at 15 kVA, 400V, 50Hz. If rated load at 0.8 pf

A 3 phase Star connected synchronous generator is rated at 15 kVA, 400V, 50Hz. If rated load at 0.8 pf lagging is supplied where resistance is 0.50 and synchronous reactance is 100. Find the voltage regulation of an alternator. (ii) Explain the advantages of having the revolving field of the alternator. (iii) A 10 pole 25 Hz alternator is directly coupled to and is driven by 60 Hz synchronous motor then calculate the number of poles in a synchronous motor. (iv) Explain the functions of Governor. (i) When the speed of an alternator changed from 3600 RPM to 1800 rpm, calculate the generated emf/phase if the initial emf/phase is 11kV. (ii) Explain the function of damper winding in an alternator (iii) A 3-phase 11kV star connected alternator has armature resistance of 1ohms/phase and a synchronous reactance of 20ohms/phase. Calculate the regulation for a load of 1500kW at P.F of (i) 0.8 lagging (ii) unity (iii) 0.8 leading

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Detailed Explanation i In the question the data is given by Line voltage V L 400 V Alternator Rating 15 KVA 15 x 10 3 VA Resistance R a 05 Synchronous Reactance X L 10 To determine the full load curre... View full answer

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