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 alternator how we can give power to rotor ? its power is AC or DC ?

5 Answers  

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explain the f=np/120 this equ.how to come 120

3 Answers   Jayaswal Neco Industries,

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If 24 KVA AVR having Input voltage 200-400v, Output voltage 415+-1%, what will be the voltage if Load is 13A.

1 Answers   Sterling Wilson,

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in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.

1 Answers  

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why is the power generator connected as star earthed or star earthed through reactance and what its features ?

1 Answers  

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What is meant by a linear circuit and what is a non- linear circuit?

5 Answers  

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what is the effect of constant power factor to the voltage regulation

1 Answers  

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What is the meaning of CT 400-200/1-1 A ?

2 Answers   Home,

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Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?

1 Answers  

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What is the purpose of stablization resistor in high impedance bus bar protection

1 Answers   Jindal,

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what is power factor

3 Answers  

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how many joint can done in HT line and what is life of the joint

1 Answers   Micro Labs, Reliance,

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