Hello Friends, How can we recognize the CT Star Point is S1 or S2 in case of Electro Mechanical Relays and what is meant by Restraining coil in relays and what is the purpose of that.. thank you in advance..

0 Answers   Siemens,

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what is RTU with SCADA connection ?

2 Answers  

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WHAT IS THE USE OF EARTH SWITCHES?

3 Answers   L&T,

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which one is more efficient, torq, power & ecnomy with the same frame size AC motor / DC motor?

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how to calculate voltage drop and followed by cable calculation?is there avail in formula?

0 Answers  

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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . please reply..............

9 Answers   NTPC,

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How many VSC based HVDC are there in India and the world

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I am going to appear for the RRB Chennai junior Engineer online exam. Please send me the previous exams question papers (also solved) to my mail id: rrkhandhar@yahoo.com

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Determine the minimum cable size for a 28A single phase final sub circuit originating from the distribution board supplied by three phase submain. The route length of the final sub circuit is 54 m. Assume 1% voltage drop in the consumer's mains. Submain specification: Cable: 50mm2 4 core V75 copper; Route length 42m; Maximum demand 135A per phase

1 Answers  

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What happend if we connect star point to ground of a star connected motor? And what will be effect on system and effeciency of motor?

1 Answers  

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how to find the resistance and gap volatage of the diode??

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The objective of connecting a resistance and capacitance across gate circuit is to protect the SCR against

2 Answers  

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