When alarm is activated in buccholz relay in transformer
Answer / spl
Depending on the model, the relay has multiple methods to detect a failing transformer. On a slow accumulation of gas, due perhaps to slight overload, gas produced by decomposition of insulating oil accumulates in the top of the relay and forces the oil level down. A float switch in the relay is used to initiate an alarm signal. Depending on design, a second float may also serve to detect slow oil leaks.
If an arc forms, gas accumulation is rapid, and oil flows rapidly into the conservator. This flow of oil operates a switch attached to a vane located in the path of the moving oil. This switch normally will operate a circuit breaker to isolate the apparatus before the fault causes additional damage. Buchholz relays have a test port to allow the accumulated gas to be withdrawn for testing. Flammable gas found in the relay indicates some internal fault such as overheating or arcing, whereas air found in the relay may only indicate low oil level or a leak.
Is This Answer Correct ? | 3 Yes | 0 No |
whether Transformer is singly excited or doubly excited machine?
What should be the conservator minimum oil level required in 2 mva transformer
How the over load setting for HT Motors calculated-provided in Numerical Relay
0 Answers Damodar Valley Corporation,
what will be fault level of 11 KV , 2000 A ELECTRICAL SYSTEM?
What Is HO factor in power selection
What is IPXX?
what is unbalanced rotating magnetic field?
how do find power factor in practically and what it means?
please give me solution to rectify the emi(electromagnetic interference)
how can I calculate charging current of cable/overhead conductor? what is roll of voltage in it ?
A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.
Why the earth terminal pin is larger than phase and neutral in three pin plug top>