Answer Posted / mahesh katakdhond

MERITS

1.Run in Synchronous speed.
2.If load changed then run either synchronous speed or zero speed(magnatic locking).

DEMERITS

1.Not self start.
2.High cost.

can mini-curcuit supply MIL-tested transformer !

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It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

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