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Question
how could we findout the lightning arrester failed or not in
live circuit? Is there any instrument to measure the high
voltage at the time of sky lighting?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
If the L.A. is intact ,you have to assume that it in working
condition.There is no need to test it with high voltage ,as
it is already subjected to working voltage .Only physical
examination may help you.In case of E.H.T,LA ,it is usually
provided with stay-put pointer ammeter to measure leakage
current.You have to replace the L.A. when the pointer enters
the red region.
 
Is This Answer Correct ?    0 Yes 1 No
K.prakashchandra
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
a. void main() { char a[6] = "INDIA"; while(*a) { printf("%c",*a); a++; } } 1. india 2. I N D I A 3. no output 4. error 5.Null   1
WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?   1
what is the ka rating of mccb. and how it is decided . Napino 2
what is the differnce between vector and phasor? are both same or there is difference between two term.?   5
why the carbon brushes are used heat created rotating parts in eiectricity   1
how many test is necessary for 27mva transformer. HEG 3
What is the function of an Auto reclosure relay. How does it work?? KSEB 3
What is Electrical Engineering? L&T 13
sir, plz tell me how much kvar capacitor required for 1000 amp or 500 Kw load ? what is the formula ?   12
Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?   1
What will be the resultant out put voltage when two different voltage rating batteries are vconnected in parallel? pls. answer with example if available.   1
What is difinition of HIGH RESISTANCE FAULT and LOW RESISTANCE FAULT?   3
 
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