what is pilot wire? what is the use of pilot wires?

Answer Posted / naseer

when ever a transmission line orequipments is to be
protected by using distance realy or by differential realy
or merz price protection. A wire is connected between the
CT which is located in different ends of the protection
zone.
This wire provide the path for the circulating current
produce in abnormal condition, which is sensed by the realy
and therefore is tripped.

Is This Answer Correct ?    46 Yes 17 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is the function of the generator exciter?

921


what is a bus post insulator? explain its application in a substation.

11743


what is kondo syatem in eletrical traction

1670


why electron produce magnetic field when it is in motion?

1693


which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor

1488






What is the difference between diesel generator engine with and without turbo charger with the same capacity?

1197


why is control bus bi-directional?

1713


how to calculate differential current when we testing differential relay..suppose we have 1000kw generator,630amp VCB,what value we should put /inject so that relay trip the VCB? PLLZ justify ur comment

1166


What are the two types of compensation?

627


HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT-SWITCH BOARD,MLDB,ACB,BUSBAR,ETC,......?

1627


Why use in ht motore

1265


What is the working principle of servo motor? And explain it.

1408


HOW TO CALCULATE CAPACITOR BANK OR HARMONIC FILTER CALCULATION

1790


can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.

4463


Terminal blocks is used for segregate the connections... There is any principle for terminal block..?

1678