Answer / rajesh k

in d case of generator, if we remove dc exciter (internal
exciter), the out put vl fail 2 produce electricity.
Consequently AVR will trip off the generator.

Answer / ketan

if the generator running in parallel opearation,generator
will draw power from busbars and act like motor to prevent
this we use reverse power relay

Answer / manan bhatt

if we remove dc exciter from running machine then due to
absence of rotational energy, machine will stop but will
take some time for remaining kinetic energy of rotor.

Answer / k.prakashchandra

In case of DC shunt motor the speed goes on increasing .In
case of grid connected gen, the machine will run as
induction motor when prime mover is shut down and as
induction gen if the prime mover is running.IN case of
series motor ,it will come to rest.

plz tell me about for how many rating (for 500kva)how much current taken?

13 Answers  

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i m in need of current rating chart of heavy duty pvc/xlpe, cu/al cables. can somebody provide me? if yes, plz send me at ashish_patel111@yahoo.com

0 Answers  

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I had finished D.E.E.E at 2004,I wish to take C license.I am working pvt company HT supply but my professional certificate was missing.I have diploma & course completed certificate.without professinel may I got c license?.pls guide me.

1 Answers   OEG,

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what is the main parts of transformer? how it is functioning? pls giv the ans briefly.

0 Answers  

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What is a feedback in control system?

0 Answers  

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what is the calculation formula for motor starting torque,running torque, running torque.

0 Answers  

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why in dc generator field rheostate kept in maximum position?

1 Answers  

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In winter we seem lightly an electric shock when we touch to doors(sometime)

13 Answers   Infosys, REL,

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how does an energy meter works?

4 Answers  

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Dear Friends, Need your help for connecting APFC panel, Quotation : I have 2 No’s 1000 KVA Transformers, both transformers are having separate APFC panels, ( Tr-1,400KVAR, TR-2,450 KVAR) Now I want to stop One transformer, present load is 650Amps, Max, So One transformer is enough, I have switched OFF TR-1, but PF is not maintaining properly, its 0.5, So now I want to connect TR-2 APFC also in TR-1 Loads, Can any one answer for my Quotation with drawing, how to connect TR-2 APFC panel in TR-1 Loads,

4 Answers   L&T,

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Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

0 Answers   MPSEB,

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while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends

0 Answers   Enercon,

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