Answer / rajesh

blowers for blowing cooled air inside train
fan for exhaust hot air
compressor ( dc /induction motor ) for cooling liquid
refrigerant to gas phase

pump for assisting flow if exhaust is above toilet at roof
ckt breaker , switch panel for control
temperature , pressure sensor
lead acid battery in case of express train
etc

In hydel power plants, L.A's, S.C's are placed inside the control panel boards. what is the purpose? [already the total body was earthed to ground.]

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How we select the cable rating

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define the active power?

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What is potientiometer.What is the use of it.

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What is difference between stable and steady?

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what is STUB protection in tranmission system and switch yard area?

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what is meant by brushed alternator & its working principle ?

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can any one list the class-a, class-b & class-c trips of power generator?

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Why 5kv megger used to megger 6.6kv motor or 33kv transformer why not 500v?

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why impudance relay used for medium transmission power system? why not others?

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if we appling capacitor at above rated what are looses and what will be happen

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what is function of rtu?

1 Answers  

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