what is the function of a commutator in a dc generator?
Answer Posted / ravi ranjan gupta
it rectifies the output alternating current so as to produce
unidirectional alternating current i.e pulsating DC.it
reverse the negative polarity current to a positive one so
as the output is a pulsating DC
| Is This Answer Correct ? | 146 Yes | 10 No |
Post New Answer View All Answers
why do we need to use 3c+3e cable, normally i select only 3c+e cable and i think it is enough. pls explain the usefull of 3e cable ( in this project the earthing system is well done)
What must be the distance between the Earth pit which are grounded from two different sources. Example: Distance between the earth pit for LV Panel-1 & 2
i m electrical diploma holder i want to do plc $ Scada some body tell me which insitute is best for me near chandigarh
DG Earth Value?
Is RTCC panel needs any control supply.
How to reduce -234126219.6403 MVAr generation and by what?
What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.
Differentiate between digital phase converter and ordinary phase converter.
can any one tell in easy method for circulating current ??
What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?
What are the operation carried out in thermal power station?
how can we select the appropriate VCB ?
why high speed tripping relay is used in protection circuit why not normal relay
I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
what is meant by neutral compensation factor and where it is used