Answer / rakesh

now when load torque increase then to remain in the steady
state i.e to make the developed torque equal to load torque
the corresponding armature current increasee ( t@i) so the
increased mechanical power comes frm the increased armature
current

the single phase voltage is 230 volts and threee phase is 430 v.why three phase is not 660 v?

2 Answers  

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How can we calculate the transformer rating if the load calculated is 1000KW (11Kv Supply)?

0 Answers  

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Dear Sirs, I am a technical persons.In one of our Electrical Sub- Station, We have installed three numbers of 1250KVA ,11KV/0.415KV Transformer to feed the Factory load. We have found some abnormality. In one of our Transformers the leakeage current from transformer body to earth through earth continuity wire is almost 86 Amp but in other transformer it is (5-10)Amp. where the load current on three phase and neutral are respectively 1360Amp,1400Amp,1370 Amp & 176Amp. So please any technical person help me about the reasons of this situation and how I can rectify the fault. Moreover,I have measured the earth resistance of the Earth continuity wire which is less than 1 Ohm. Thanks Tapas Barua

3 Answers  

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respected sir, sir recentely i have applied for chennai and tiruvananthapur section enggineer and juniour engg in electrical dept. but still i donot get how i have to syart my preparation and also t the same time i donot know exactly what they r going to give in the examinations i mean which sections they r going to give i donot know exactly, can u prefer whichh books i have to follow and model papers or both boards

1 Answers  

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i have 90kw motor.so i choose connect cable .please what is parameter checked so please give to formula

0 Answers   May Baker,

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Electrical breakdown strength of an insulating material depends on............?why because?

2 Answers  

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How many lightning arrestors to be installed on 50MX60MX10M building and is there any formular for that?

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single sphase energy meter measur

7 Answers  

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what do you mean by class PS CT and what are technical details needed for calculating it?

0 Answers  

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how "rabbit ACSR" conductors are more efficient than "weasel ACSR" conductors

1 Answers   AITM,

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what is name of transformer oil ?

58 Answers   L&T, MPSEB, OPTCL, Practical Viva Questions, Servo, TATA, XLPE, ZGL,

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what is the working principle of soft-starter & how it diff. from VFD ?????????

5 Answers   L&T,

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