What will happen to the protection and metering, if the polarity of a single or two PT/PTs in three phase system is reversed? Please provide reference if any.

0 Answers   Mind Tree,

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Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?

0 Answers  

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Can anyone explain, How will get positive to ground and negative to ground reference voltage in dc system

1 Answers   NCC,

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which motor is suitable for traction? why?

15 Answers   BCH, KPCL,

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in the farm,water tank of 8000 litter capacity situated in 12 meter above.Farm owner want to lift 7000 litter of water within 7 minute to water tank of 12 meter above.which motor having HP rating is suitable for pumping??

1 Answers   ABB, Anchor, Havells, Keltron, KSEB, L&T, vguard,

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what is the procedure for erection of a transformer

1 Answers   TCE,

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What is the maximum percentage voltage drop (vd%)for a motor control center

0 Answers  

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how LVDT works?

2 Answers  

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Define pole pitch?

0 Answers  

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What are the neccessary safety arrangements before commissioning of HV substation?

1 Answers  

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how to select a air/vacuum circuit breaker.is there any thumb rule???

1 Answers  

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what is the diff b/w HP and KW

10 Answers  

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