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 (3070)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3287)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13321)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2362)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (416)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (79)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (163)
 Instrumentation interview questions  Instrumentation Interview Questions (2374)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (106)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (43)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (75)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1195)
Question
define IDMT relay?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
It is an inverse definite minumum time relay. In IDMT relay
its operating is inversely proportional to fault current
and also a characteristic of minumum time after which this
relay definately operates.
 
Is This Answer Correct ?    210 Yes 18 No
Nimish
 
Answer
# 2
Inverse definite minimum time relay 
Is This Answer Correct ?    188 Yes 24 No
Niranajn
 
 
 
Answer
# 3
It is inverse in the sense , the tripping time will decrease as the magnitude of fault current increase.
simply saying,
"for a fault current of 25KA-the time delay may be 2s.
& for a fault current of 30KA the tme delay may be 1.5s.thus as the fault current increases the time delay decreases.
 
Is This Answer Correct ?    141 Yes 4 No
Klm
 
Answer
# 4
It is Inverse Definite Minimum Time Relay. This will work
inversly proportional to Fault current and our time delay
settings in the relay.
 
Is This Answer Correct ?    78 Yes 16 No
Suthan Prabhu
 
Answer
# 5
IDMT - Inverse Definite Minimum Time lag

Inverse - Operating time is inverse with fault current magnitude
Definite - Time characteristics is definite (Near constant) irrespective of current magnitude

Minimum time lag - time taken to operate is less when compared to other protection relays
 
Is This Answer Correct ?    47 Yes 5 No
Prasanna
 
Answer
# 6
IDMT relay means inverse definite minimum time relay.That
means when fault current increases then operating time
decreases.
 
Is This Answer Correct ?    36 Yes 3 No
Md.moazzem Hosen
 
Answer
# 7
it is a type of inverse current relay but with minimum time
delay
 
Is This Answer Correct ?    35 Yes 12 No
Shyam
 
Answer
# 8
is an inverse definite minimum time relay
there are 2 precautions to be considered when using this these precautions are the time setting and the current tap setting
these are to be considered since the relay is dependent on the inverse of time
 
Is This Answer Correct ?    19 Yes 4 No
Adesh
 
Answer
# 9
The IDMT Inverse definite minimum time relay is one such
type of relay where the delay time of the relay is
inversely proportional to the magnitude of the fault
current. For ex. If the fault current is of the magnitude
of 8KA the delay taken by the relay to tripp the ckt may be
3 sec likewise if a fault current of 16KA persists in the
system the IDMT delay time will automatically reduce to 1.5
sec and so on. It is used in applications of overcurrent
relays and earth fault relays.
 
Is This Answer Correct ?    10 Yes 0 No
Er. Mohammed Yusuf Fahad
 
Answer
# 10
it is inverse definite time relay.and in the name it self
inverse means when fault current is more then its operating
time is less.because if it takes more time the equipment
may damage.so to avoid this the relay is made with inverse
characteristics.
 
Is This Answer Correct ?    10 Yes 3 No
N.ravi Teja
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
How much allowable difference current between on three phases Dear sir, We have a 1870 KW HT motor, 11 Kv supply,FLA-120A,2870 rpm,2-pole squirrel cage induction Motor.And stator is connected in star connection with Liquid resistance stater to limit the starting current.It has coupled with Centrifugal air compressor.My question is it is loading 73% of FLA taking R-phase 86.7 A, Y-phase-85.4A,B-phase- 78.3A.why the B phase current is that much of difference.Is it allowable, or any one tell me how much allowable current.If any method to calculate.   1
what is the difference SCR & TRIAC? Tcs 9
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
how LT meggar works Essar 1
How many input terminal of single phase transformer.which is use for rural power distribution. RMSI 1
How open delta used for protection?   4
if 50hz transformer is required to be run on 50% frequency what needs to be done??????????? century 6
what is the working principle of tube light?   2
how calculation to be done of cable size/o.h. conductor size of 11kv h.t.for the load of 2175 kw Shell 1
why transformer rating in kva?   7
WHAT IS THE FULL FORM OF CABLE TYPE-AYWY,AYWAY,YWY ? Polycab 6
what is the difference single phase and 3phase starter   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