Answer / nikitha

Used in transmission lines;
near alternators and substations- non directional
else - directional

Answer / sheikh

Different kinds of over current relay are available.
on HT side over current relay is a part of protective relays.
and LT side over current relay are using in motor starter,
ACB. There are 2 type of over current relays used in motor
circuit one is thermal over load relay second one is EOCR
electronic over current relay etc.

What is the physical significant of power factor?

0 Answers   Cooper,

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Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?

0 Answers   AVT Natural Products, EMC,

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why single core HT cable need only one side earthing?

2 Answers  

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Can u explain : how capacitor act when the supply is given is a.c and d.c. I know that when d.c supply is given then the capacitor charges and becomes open circuited. But please say about when a.c is given. I have seen that when a.c supply is given ,it charges and discharges, But when we plug in capacitor to our daily supply and take it out ,then we join those wires spark will appear,which seems charge is present ,but when a.c is given it should charge and discharge

3 Answers  

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What happen to generator if i have unbalanced load?

0 Answers   Reliance Energy, Sail, TCS,

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why humming sound occured in HT transmission lines.

9 Answers   GE,

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What will be the voltage regulation of a full load and 0.80 power factor lagging load transformer when a two winding single phase transformer has a voltage regulation of 4.5% at full load and unity power factor?

0 Answers   HPCL,

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it is difficult to interrupt a capacitive current because (a)it has a leading power factor (b)current magnitude is very small (c)the restriking voltage can be high (d)stored energy in the capacitor is high

2 Answers   DGVCL Dakshin Gujarat Vij Company, MGVCL, UGVCL Uttar Gujarat Vij Company Ltd,

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what is the difference between Power and Distribution transformers ?

0 Answers  

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what is ht breaker

8 Answers  

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What is the difference between line drop and percentage line drop?

0 Answers   Suzlon,

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what is the working of air drayar

1 Answers  

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