Answer / k.prakashchandra

Nothing . Reversal of field polarity is recommended to reduce residual magnetism

which type your UPS on line,off line give the reason?

2 Answers   Roto Power,

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we change the speed of the synchronous motor by incresing or decreasing a rotor resistance

1 Answers  

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I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id:upendrakrishna20@gmail.com,plz send me ,or send any other rrb papers plzzzzzzzzzzzzzzzzzz

0 Answers   RRB,

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What happens if the series current double?

0 Answers  

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What is SNMP Card Monitoring in UPS???

2 Answers   Emerson, MAA, SNMP,

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in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

8 Answers  

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why is that a 4*4mm cable,is always powdered internally

3 Answers   Construction, L&T,

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What are documents to be required for export of the material?

1 Answers   Siemens,

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Isolation transformer primary to sec turns ratio?

2 Answers  

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if three phase supply is given to single phase transformer, what will happen?

3 Answers  

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Why cpaciter opposes sudden changes in voltage?and how?

1 Answers  

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how can we calculate the ampacity of the electrical wire/cable. and what are the factors must be considered. pls. elaborate.

0 Answers   Webel,

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