what is threshold voltage for a relay???what does it exactly means ?whats its value in our indian transmission system say 11kv feeder RMU relay

3 Answers  

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How to calculate the 2500 Kva Transformer losses Primary 11KV Secondary 415volts

1 Answers   Laurus,

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on a three-winding transformer relationship delta-delta-star, on third winding why the relationship is a star? what are the advantages and disadvantages? Thank you and please help

0 Answers  

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what are the protection for DG set and why?

2 Answers  

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If ROC does not lies inside unit circle,then ? a) Fourier transform converges b) Z transform converges c) Hatly transform converges d) Colpit Transform converges.

0 Answers   CCP,

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why ac supply neutral should earth not in dc (-)

2 Answers  

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What is d diff. btw MCB & MCCB???

1 Answers   Emerson,

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what is the function of choke in the flourcent tube lights and why the colour is in white mostly in flourcent tube lights

0 Answers  

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Why earthing is required, and what effect in earthing result is more than 5 ohm and less than 5 or equal to 0 ohm

2 Answers  

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If Dg set load increase 25%, How much increase fuel Consumption (15 kva 2 cylinder DG set)

0 Answers   TATA,

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what should be the ideal gauge of wire (In sq mm) for different loads in Ampere?

0 Answers  

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I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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