Answer / abishekmittal

In transmission lines, we can have different types of
protection like.
1. Distance protection
2. Back up distance
3. Cable differential protection
4. Line differential protection

Answer / er.s.ramkumar

Distance relay used for transmission line protection, this
relay operate when fault happend in the line.save the load
or other working equipments.

Answer / sindhu

in case any fault occurs in the transmission line, it is
used to isolate the healthy side from the faulty side i.e it
is used to protect the line from total damage.

Answer / karthi

in abnormal condition,fault current may be more, to isolate the fault current elemente from the system

WAT IS MEANT BY COLD AND HOT START OF A MOTOR?? HOW DOES IT AFFECT A MOTOR'S PERFORMANCE??

4 Answers  

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11kv = LT 440v , how many amp.supose 440v side 5000 amp curent drown

2 Answers   Motwane,

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I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

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what is servo motor principle? difference between induction motor & servo motor?

1 Answers  

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I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?

0 Answers  

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in an electronic tri vector meter when the current and voltage sequence changes ? what is the effect of phase sequence on recording of meter

0 Answers   L&T,

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what is the VA(Volt-amphere)? define with calculation?

0 Answers  

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No load test of induction motor is carried out to compute= A stator resistance B rotor resistance C magnetizing reactance D rotor reactance

1 Answers  

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How does a digital electronic meter work??????

0 Answers  

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Why are we not getting shock while touching a metal which is being welded?

1 Answers  

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True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)

0 Answers  

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what is power factor

5 Answers   Exide,

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