ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3119)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3299)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13431)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2385)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (420)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (80)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (165)
 Instrumentation interview questions  Instrumentation Interview Questions (2394)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (107)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (45)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (78)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1203)
Question
how to measure earth pit resistance
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Earth pit resistance is measured by Earth tester, Earth
tester have four terminals P1,P2,C1,C2 i.e. Two potential &
Two Current terminals. while earth pit testing, P2 & C2 are
shorted and C1 connected to current spike(Conductive rod)
which should be drived into soil at around 30 meter
distance from earth pit and P1 is connected to potential
spike(Conductive rod) drived at around 15 mtr away from
earth pit in the direction of current spikes.By rotating
the handle of meter(in old meters) or by pressing test
button (in new type meter) one can get earth resistance.Now
Potential spikes are drived at different locations toward
earth pit and current spike side and a curve between
distance and resistance is plotted. Earth resistance will
be platue of the graph.In this meter current is passed
between earth pit and current spike and potential is
measured between potential spike and earth pit. Ratio
between Voltage measured and current passed thrugh the
earth is the resitance of earth pit.
 
Is This Answer Correct ?    62 Yes 9 No
Bhatt
 
Answer
# 2
The earth pit resistance is measured by Megger meter. This
measurement will be done on every two months once in the site.
 
Is This Answer Correct ?    41 Yes 28 No
Karthik.j
 
 
 
Answer
# 3
Earth pit resistance is measured by Earth tester, Earth
tester have four terminals P1,P2,C1,C2 i.e. Two potential &
Two Current terminals. while earth pit testing, P2 & C2 are
shorted and C1 connected to current spike(Conductive rod)
which should be drived into soil at around 30 meter
distance from earth pit and P1 is connected to potential
spike(Conductive rod) drived at around 15 mtr away from
earth pit in the opposite direction of current spikes.By
rotating
the handle of meter(in old meters) or by pressing test
button (in new type meter) one can get earth resistance.Now
Potential spikes are drived at different locations toward
earth pit and current spike side and a curve between
distance and resistance is plotted. Earth resistance will
be platue of the graph.In this meter current is passed
between earth pit and current spike and potential is
measured between potential spike and earth pit. Ratio
between Voltage measured and current passed thrugh the
earth is the resitance of earth pit.
 
Is This Answer Correct ?    9 Yes 2 No
Satya Narayan Padhy
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
what is a panel board?   1
what is isolation Transformer? HP 8
what modulation is used in landline telephone signals?   1
why transformer capacity is called KVA and motor capacity is called HP/KW? Why transformer capacity cant call HP/KVA?   5
i asked a funny question in Electrical ohms law V=IR in const temp voltage is directly proportional to current Power p=VI cos@ in that formula Voltage is indirectly proportional to current Try to give me the fact what is happening in Electrical.. contact Thanigai_1984@yahoo.co.in   3
what is difference between mccb,mcb,elcb,pccb   7
sir what is the purpose of SF6 in HT breaker and what is the pressure should be maintain in the breaker? Kirloskar 2
What is OT in a transformer, specify its function.   2
For the same power rating,which motor is bigger in size,AC or DC?   8
What is the importance of RESONANCE   2
what is balanced network and unbalanced network Nalco 1
What is the difference between class0.1 and class 0.1s accuracy of current transformers   1
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com