We in my plant one of the transformer showing neutral to
earth voltage is 22V how to solve it
Answers were Sorted based on User's Feedback
Answer / k.prakashchandra
Disconnect earth and measure voltages between phases and
neutral on some load.If the voltages are not equal there is
a loose connection in the star point.Before doing
this ,check the earth connection at neutral bushing.
Is This Answer Correct ? | 7 Yes | 0 No |
Answer / wasim
Check resistance of earth pit/mesh connected with Start
point (Neutral of Transformer). If reisitance is more than
5 Ohms your Neutral to earth voltage will be increased
accordingly. So you have to improve the resitance of your
earthing network to less than 1 Ohm
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / aditya199307@gmail.com
Such types of problem occur due to increased in value of earth pit.
So 1st you checked the all earth pit values individually by opening all the grounded connections.
As per standard the values of earthing in HT yard should be less than 5volt.
If the value is greater than 5 volt then apply the procedure to reduce the value, which is different as per type of earthing (Normal or Chemical).
If the values should be comes as per rated value your problem is short outed.
If you talking theoretical part then voltage between N & E is zero.
But practically 2 volt is permissible but i.e. also not good for the system
It will affected on electronics system.
Such types of problem occur in the hilly areas or in rocky soil.
( If the value will not coming as per standard then add n....number of earth pits in series otherwise use counterpoise method.)
Is This Answer Correct ? | 0 Yes | 0 No |
How much no load current of synchronous motor
0 Answers Nirma, Sulphur Mills,
Is there any Institution for giving M-tech in Electrical engineering for those who r in service? Give the details please.
what is the maximum temperature rating of a thhn insulated conductor?
what is diffence between synchronus and asynchronus AC motor.?
what is PDU in transformer?? which company manufacture??
hi frnds can any one help me ? plz send me placement paper of IOCL of Electrical streem .... plz send ....its urgent....
how to determine Sq.mm size of finolex power cables.
Why secondary of a CT in a power system acts as an open circuit after core saturation?
how to calculate the capacity of CT operated LT trivector meters on a particular distribution transformer.
what is JE exam?
Why Power generation in India is at 50Hz while in America its 60Hz so is there any advantage/Disadvantage of this ??
38 Answers Australia Visa, College School Exams Tests, Fiat, InfoPlus, L&T, NTPC, TCS,
minimum ohm for lighting minimum ohm for Earthing