what are the ''pitting rings''and how cn they be controlled in a series generator

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why we use negative feedback in control system.

2 Answers  

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what is recovery voltage & transient voltage ?

1 Answers   Bhel,

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A 3 phase motor operating off 415V system is developing 20Kw at an efficiency of 0.77 and power factor of 0.73. determine:- a)the line current. b)the phase current if winding are delta connected. c)the phase voltage if winding are star connected.

1 Answers  

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Write the analogous electrical elements in force voltage analogy for the elements of mechanical translational system.

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what is the formulae for selcting capacitor bank to increas pf

4 Answers  

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What conditions are required for a transformer to operate at low frequencies ?

1 Answers  

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How to Select transformer for 100HP motor plz... With calculation

2 Answers   Rasandik,

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We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11KV switch yard having 12.5MVA power transformer. Some times we draw power during emergency. It is observed that during Export or Import for load less than 500Kw the power factor is decreasing to 0.3 . This is happening only during export or import. During island condition TG power factor OK.Our capacitor bank is provided with our Power plant auxilliary load. Please suggest how I can we improve our power factor during low load (GRID).

3 Answers  

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How does a battary stores charge in it? please explain in simple manner and in detail.thanks

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some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?

0 Answers  

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why transformer ratings are in kva

4 Answers  

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