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Maritime Forum

TOPIC: Marine Engineer Officer (Electro Technology)

Marine Engineer Officer (Electro Technology) 04 Feb 2012 19:43 #1539

Give some of the applications of synchronous motors. How may the direction of rotation of a three phase motor be reversed?
A 3-phase, 50 Hz, 6600 V, alternator is rated at 6600 kw at 0.8 power factor and a full-load efficiency of 90%. Determine KVA rating of the alternator, power input and horse power input.
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Re: Marine Engineer Officer (Electro Technology) 30 May 2012 13:46 #3938

  • Sravan
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change any two phases in 3 phase then d direction wil b reversed...
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Re: Marine Engineer Officer (Electro Technology) 09 Jun 2012 03:35 #4046

  • class 1 exam candidate
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synchronous motor is used in electric propulsion, synchro converter system
and also shaft generator as a synchro compensator to supply reactive load as the shaft generator can only supply true power.
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Re: Marine Engineer Officer (Electro Technology) 09 Jun 2012 03:40 #4047

  • class 1 exam candidate
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6600/0.8= 8250kVA
8250/.9=9167kW input = 12293shp
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