Answer / guest

Eventhough altenators are associated with stability, still
we use alternators because of its inherent advantages.

1.when we are generating electricity from conventional
sources like thermal n hydal, the primemover input is in
our control so u can maintain constant speed. so we use
alternators because dese m/cs run at constant speed.


2. other advantage is powerfactor is in our control. By
changing the excitation we can control the power factor.

3.Cost is less when compared to same rated DC alternator.

what is the basic difference between capacitor and condenser ?

17 Answers   ABB, Essar,

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2 Answers  

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what type of oil is used in transformers? a)conduting b) insulating

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The importance of resonant filters in converters?

1 Answers  

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explain the process of commutation in a dc machine. Explain what are inter-poles and why they are required in a dc machine.

0 Answers  

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1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?

0 Answers   IBM, Kirloskar,

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10. THE MOST COMMON TYPE OF THREE PHASE IN UNSYMMETRICAL FAULTS IS ........

6 Answers   SSC,

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0 Answers  

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in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.

0 Answers  

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i want to run 11kv star connected motor in 6.6kv with delta connected throught inverter, is it possible?

0 Answers  

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wat is power factor

7 Answers   IOCL,

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What is the function of an Auto reclosure relay. How does it work??

4 Answers   KSEB,

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