how can we change the polarity of Alternating current rapidly? how frequency of ac can be controlled and changed easily?

0 Answers  

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How much energy save vfd if motor run on 50 Hz (full speed)

3 Answers   Reliance,

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what is main reason for grid earthing for any industry

4 Answers  

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3. What is Impedance Voltage in Transformer?

16 Answers   KESC, L&T, Torrent Power,

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for 5KW resistive load can anyone please suggest me whether to go for UPS/Inverter or Generator depending upon cost calulations

0 Answers  

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Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

0 Answers  

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why celing fan is running in anti clock wise and table fan is running in clock wised?

5 Answers  

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what is infinite in infinite bus

4 Answers   GES,

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from 33kv to 440v 2mva transformer how much full load current will be at ht side and lt side and which range of ctpt will be used?

1 Answers  

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how we test a 3 phase motor on single phase supply....? HOW WE RUN A 3 PHASE MOTOR ON SNIGLE PHASE. supply for testing..? how we verify of a 3 phase motors 6 wire & name thame a1/a2/a3..b1/b2/b3 and c1/c2/c3 for connecting star delta starter ........i have only 1 phase supply ? help forum..........

1 Answers   Enercon,

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differentiate between remote backup relay and local backup relay?

1 Answers  

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How to calculate VCB current rating for 2000 KVA transformer

1 Answers   Yamuna Power and Infrastructure Ltd,

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