what is the function of buchhos rely in transformer
Answers were Sorted based on User's Feedback
Answer / ilononurb
Buchholz is a gas actuated relay which response if there is
any abnormality inside the transformer. Ex. If there a
incipient fault happens in transformer winding. arc causes
decomposition of oil that contains more hydrogen gas which
being light rise upward to bocholz relay. The gas is
collected to upper side of the relay. therby oil level drop
down in the B-relay that tilt the mercury switch that close
the alarm circuit.B-relay gives an alarm so that the
transformer can be disconected before the incipient fault
grows in to serious one.
Is This Answer Correct ? | 11 Yes | 0 No |
Answer / prashant
when there is any abnormal condition like
overloading,overcurrent,or any such things which increase
the tempreture of oil,,,then there will be gas bubble in
oil,,,,buchhos relay senses this abnormal condition,,,,
it will also give alarm signal if oil level is lower than
pre decide value,,,,,,,,,
Is This Answer Correct ? | 13 Yes | 4 No |
Answer / kjh
I agree with answer #2 .I want to add some, B-relay has two
stages one is connected in alarm circuit and the other is
connected wtih tripping circuit.It also tripping the
incomming C.B. of the transformer in case sewear fault.
Is This Answer Correct ? | 3 Yes | 1 No |
Answer / atti
Actually Ans # 04 option # B IS not the function of b-Rely.The
function of B-REly is the smoke detection not to check the
leakage.Allthough It has a oil leve detector .
Is This Answer Correct ? | 0 Yes | 0 No |
It is known as BUCHHOLZ relay.
A buchholz relay is operated by the accumulation of air bubbles within a transformer.
a) When a short circuit happens within the windings or within the contacts of the tap changer or any other shortings a localised heating takes place and gasses are liberated within the transformer.
b) When there is a leak in the transformer and the oil level drops or
c) The temp drops too low and the oil level falls below the required level.
These conditions trigger the float switch within the buchholz relay. The contacts are used for tripping the transformer or to on an alarm.
Is This Answer Correct ? | 0 Yes | 2 No |
can anyone plz tell me in 3 phase induction motor, whare we use STAR CONNECTED MOTOR and whare we use DELTA CONNECTED MOTOR
Between AC generator(alternator) and DC generator which can be designed for high voltage and why?
If we are importing real power & exporting reactive power then what will be the effect on our system
Why 3 phase induction motor getting supply in body if one of it's phase is cut
What is the mmf,rgt and ngt please brief completely
what are factors to be consider in electrical installation like load factor,diversity factor .....
When steam condenses and becomes water at the same temperature, the specific heat for the process in kJ/kg k is
how the B-H loop obtain under the static condition
(1)The demand for electricity , the amount of renewable generation available, the amount of fossil fuel generation available and the cost of the fossil fuel generation are shown in table below period(hrs) demand(MW) renewable (MW) fossil- fuel(MW) cost of fossil fuel(MW) 00.00 - 01.00 2000 1800 2000 30 01.00 - 02.00 2300 2500 2000 30 02.00 - 03.00 2500 2700 2100 45 03.00 - 04.00 2900 3100 2100 50 04.00 - 05.00 2700 2600 2500 45 05.00 - 06.00 2400 2000 2700 50 06.00 - 07.00 2200 1800 2000 36 07.00 - 08.00 2100 1600 2000 36 Assuming that the renewable generation incurs zero cost, determine an optimal generation schedule(specifying the amount of renewable generation and fossil fuel generation used in each period, the cost for each period and the overall cost for 8 hours.)
What is working Priniciple of TVSS ????
What is the basis for selecting Vk/2 or Vk/4 for REF and Differential protection of Transformer and What is the significance of magnetising current
what is the difference between LT & HT Motors