we have one ups its neutral is not earthed.its one
distribution MCB has a earth fault.but we can not put off
any MCB.so how to find out that in which circuit is earthed
without isolating the breaker.

Answers were Sorted based on User's Feedback



we have one ups its neutral is not earthed.its one distribution MCB has a earth fault.but we can n..

Answer / dudeblore

By using a megger meter you an find out the faulty circuit.
The faulty circuit will have a less resistance as it has
connected to earth somewhere.

Is This Answer Correct ?    4 Yes 2 No

we have one ups its neutral is not earthed.its one distribution MCB has a earth fault.but we can n..

Answer / guest

measure+ve to earth the earthed mcb will show low voltage
than other mcbs

Is This Answer Correct ?    2 Yes 1 No

we have one ups its neutral is not earthed.its one distribution MCB has a earth fault.but we can n..

Answer / sumitgarg

to aviode that probelem in furure you can use a ELCB or
RCCB that will help to find and earth the earth fault
current.
that shoud be of 1 Amp. rating.

Is This Answer Correct ?    0 Yes 3 No

Post New Answer

More Electrical Engineering Interview Questions

what is the minimum (Common factor) insulatin resistance of the following a, 4mm sq wire b, cable from 50 mm sq to 800mm sq

0 Answers  


if step down transformer step down the voltage,will current will also be proportional step up. If yes then how transformer handle such a large current?

4 Answers  


Define gain margin?

0 Answers  


how to determine capacitor bank capacity of one plant..

2 Answers   Dalkia, SPDC,


how to reduce earth resistance in sandy soil.

1 Answers  






What is tan delta point of transformer?

2 Answers  


why we can turn on the phase-A scr in 3 phase converter at 30 degrees

1 Answers   JSW,


How time response of the system is divided?

0 Answers  


I would like to install the largest KW alternator to a 200 amp aluminum bus box in my home. Is it possible to install a 250 KW 400v 251amp synchronous alternator to my home?

2 Answers  


sir can you operated Transformer on frequency from that for which is design?

1 Answers   Kirloskar,


How can we find out LT UG cable fault (size,from-4*25mm sqr to 4*300mm sqr)? How mani types UG cable faults?

0 Answers  


. The string effcy in AC sys is 80% Then for same power, the string effcy in dc sys is a) less than 80% b) 80% c) more than 80% d) zero

1 Answers   Engineers India Limited,


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)