Answer / guest

three phase meggering is three colors 1)Red,2)yellow, 3)
blue, and black is nutrel, and green is earth

Answer / jamil akhtar

three phase wiring may in star or delta. In case of star
red, yellow and blue wires will be phases and the fourth
wire will be called neutral, In delta no neutral wire is
present.

Megger is a measurement of insulation of winding/windings
with respect to ground or earth.

what will happen when reverse reactive power occurs in alternators?

3 Answers   Reliance,

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hi pal, i am vengatesh from tamilnadu(chidambaram),i have called for the written test for the post of jr executive(ELECTRICAL) of AAI ,I dont know about the question paper pattern,so any kindly help me to face the examination,post me the model question papers and some tips to write my examination to (vengi.annadurai@gmail.com)

0 Answers  

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What is the differentional relay...what is the work of this in power Tx. how it is works..

0 Answers   ABB,

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Why we are testing a tan delta test in transformer? which purpose conduting that test? and time priode test?

1 Answers  

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where we use stardelta starter and dol starter

4 Answers   HCL,

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AT THE TIME OF INSTALLING THE POWER PLANT POWER IS TAKEN FROM NEARBY GRID AND GIVING THE SUPPLY TO THE GENERATOR WHICH ACTS AS MOTOR. WHAT IS THE NEED OF RUNNING THE GENERATOR AS MOTOR?

6 Answers  

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how does an encoder work???

0 Answers  

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what is the use of choke on tube light fitting

37 Answers   Bhel, Dharma, HSBC, TCS,

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I am working as a software engineer for the past 4 years. I am interested to do M.tech in premier inst. like IIT, IIIT, NIT,... I am preparing for the GATE exam for the past 2 years. Can anyone tell me how about the placement in IIT's for m.tech in (microelectronics and vlsi or electronics related discipline). Some of them are telling like placement is very rare for m.tech electronics. Also the placement details in IIT websites are not true. Is that so ? can any one help us regarding this.

1 Answers  

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how we can calculate earth fault current?

1 Answers   Alchemist,

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The neutral to earth connection in my industry is showing a zero reading (shorted). I have a machine which has to be installed where neutral to earth is not shorted and shows a leak voltage <3 Volts. Please suggest me how it is possible.

6 Answers  

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what is the deference between watt and KVA

3 Answers   IAF,

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