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

WHAT ARE THE FACTORS REQUIRED FOR SELECTION OF TRANSFORMER RATING?

13 Answers   Tech Mahindra, Technip,

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following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

0 Answers  

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what is ripple component in ac supply?

2 Answers  

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Why using synchronising methed in DG's sets?

0 Answers   Juniper Networks,

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Can we calculate the P.F if we know the only load on alternator .

1 Answers   Medha, Medha Servo,

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What is High Frequency Grounding????

2 Answers   Emerson,

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 where the Motorized mccb to be used? In Motor control center panel starters ,it is use full. please answer  

1 Answers   Voltas,

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How much RPM in Turbocharger in Diesel engine.

9 Answers   Greaves, MAHINDRA,

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how squirrel cage & slip ring motor works? how they differ from each other

1 Answers  

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why universal motor work on ac & dc both?

1 Answers   EMC, emc2,

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What are the effects of electrical faults?

0 Answers  

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You required 5A from the transformer but you get 8A. How do you minimize this?

2 Answers   Bajaj, Siemens,

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