WHY HUMMING SOUND OCCURED IN HT TRANSMMISSION LINES ?
Answer Posted / nitin narwal
it is due to d magneisation n dmgntsn of d condutor due 2
wch lngth inc n decr.
study diff bw hmmng n hssng sound 1st
Is This Answer Correct ? | 6 Yes | 5 No |
Post New Answer View All Answers
An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?
what are the different methods for the starting of a synchronous motor.
who can measure the size of power cable?
66kv under ground cable how to layaing in ground any special case two ckt r runing
plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.
What is the difference between the transmission line and distribution line?
If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?
what is the purpose of silicon dropper used in battery charger?
why does connected a indutor with mnsformeretering core of current transformer ?
how to define tell me about self
What is the different types of cable & current capacity of cable
Whether power factor should be high or low? Why?
sir pls tell me . our ct specifications are 120/5 ,2 core , 0.2 and 5p10 class , 30va and 30va buden. insted of 30 va i want use 15 va. can i use?
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation