Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / rahul sharma
BDV tests is used to test the dielectric strength of the
transformer.
A new transformer oil shol\uld have at least dielectric
strength of 39 KV as per british standards.
Transformer oil used are normally tested using ASTM D877-82
with the KV strength testing,using 1" electrode spaces 0.1"
apart & test voltage increased at 3000 volts\min until it
breaks down. The avg KV obtained after 8 trails is
considered the oil dielectric strength.
Using this test dielectric strength at 30KV & above is
considered good. Dielectric strength between 23 to 29 KV is
considered usable ,but requires filtering, below 23 KV
transformer oil should be replaced.
| Is This Answer Correct ? | 41 Yes | 8 No |
Post New Answer View All Answers
lamination figures
Ratings of power transformer,Distribution transformer.
what is diff btw electric,magnetic & eletromagnetic field
Why insulation level follows this order? transformer < bus bar < circuit breaker & Isolator < transmission line.
best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?
how to calculate fault level?
what is the mechanism of operation of brushless dc motor why is it more wexpensive then ordinary permanent magnet motors
How a band pass filter is constructed?
dc supply given to dc generator winding.how is possible? my knowledge is saying the winding will burn. please reply.
Pls explan the OLR setting in VCB at HT yard
How can we calculate the KVA rating of a Distribution transformer from its core details?
In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.
High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?
How to calculate multiplication factor in kva example 500kva ans pls ?
How to check 11000/1.732 to 110/1.732 Potentila transformer (PT)?
