How the Transformer oil testing is done & Why oil dielectric
goes LOW & what is solution for that ??
- 3 Answers
- 11597 Views
- NTPC, I also Faced
- E-Mail Answers
Answer Posted / pillay
The sample oil to be tested for dielectric test is collected
and put into the tester and the average of 6 tests is
taken.The minimum withold voltage is as per local regulations.
causes of low dielectric results are usually exposure of the
insulating oil to moisture through the breather or there is an
exposed opening, poor quality oil being used. high acidic
content.The insulating oil should be replaced or dehydrated.
breathers silica gels should be maintained good all the time
and check for any leaks or any exposure to atmosphere must be
rectified.
| Is This Answer Correct ? | 15 Yes | 1 No |
Post New Answer View All Answers
Brief me about maintenance planning & sheduling of machine tool.
how to calculate singlephase motor efficiency?
Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.
Can the output voltage of a rectifier be greater than the input AC voltage without the use of any voltage multiplier in the circuit??please provide the explanation too..
what is DRP panels?
How calculated single phase induction motor req. Capacitor?
How does PLC work for sychronising of Two or more DG sets?
Why collecting electrode of ESP to be earthed
what is the use of vcb & isolator in substation?
What is the equivalent circuit of a transformer and its vector diagram?
Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box
There are a trformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?
UG cable sizes were specified in sqmm. But practically its not coming to mesure. What's the reason for that? And how they specify the size of the cable?
How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?
Dear sir, I have completed DECE in the year 1995. I have work experience in HT and LT LINE more than five years. Now i am doing BE in EEE from rajasthan university. After completion of BE,can i apply "C" Licence sir? Please reply.
