Interested to Buy Any Domain ? << Click Here >> for more details...
Dear Sirs,
I am a technical persons.In one of our Electrical Sub-
Station, We have installed three numbers of
1250KVA ,11KV/0.415KV Transformer to feed the Factory load.
We have found some abnormality. In one of our Transformers
the leakeage current from transformer body to earth through
earth continuity wire is almost 86 Amp but in other
transformer it is (5-10)Amp. where the load current on
three phase and neutral are respectively
1360Amp,1400Amp,1370 Amp & 176Amp. So please any technical
person help me about the reasons of this situation and how
I can rectify the fault. Moreover,I have measured the earth
resistance of the Earth continuity wire which is less than
1 Ohm.
Thanks
Tapas Barua
- 3 Answers
- 6015 Views
- I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
Check the insulation resistance of No. 1.Connect a voltmeter
between body and the earth and measure the leakage voltage
which is expected to be more 86V.Unbalanced currents are
also due to contact resistance .
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
What is big transformer parts and their function ? Ty
why any centrifugal blower draw more current in starting. consider id fan and fd fan?
why do we have spikes enough to burn electronic boards, when generators are not grounded
can you plz send l&t aptitude questions if available its urgent plz plz plz
Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?
Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.
how many safety really of DG sets.
What is the numerical quantity of sqcm?
what is interpose? where it is used and why it is used?
High speed earth switch operation with diagram
Give atleast 20 alternating current apparatus and devices.
please send me the previous year's question papers of jindal GET exams
A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.
what happens to the supply voltage if there is any change in frequency?
we use capister for power factor. when we use capaciter in dg circuit than defect dg. can we use capaciter bank for dg circuit
