what is buchholz relay?what is it used for?
Answer Posted / humayun khan
Buchholz relay is a safety device mounted on oil-filled
power transformers and reactors, equipped with an external
overhead oil reservoir called a conservator. In case of
internal fault such as overheating, arcing or decomposition
of insulating oil gas gets accumulated on the top of the
relay and forces the oil level down. A float switch in the
relay is used to initiate an alarm signal.
Buchholz relays have a test port to allow the accumulated
gas to be withdrawn for testing. Whereas air found in the
relay may only indicate low oil level or a leak.
Is This Answer Correct ? | 11 Yes | 0 No |
Post New Answer View All Answers
what is cathodic protaction?
Can we Co-ordinate relay in Load Break switch?
What happen if we apply square wave or traiangular waveform voltage to the transformer primary winding instead of sinusoidal wave?
Explain the operation of variable frequency transformer?
if an insulated power and control cables of a running gas diesel gensets laid direct in an open trench i.e, trench bed is not rcc of a power house in which rain water, spillage water alwas exists and all power control cables remains submerged even when gas gensets of 480 kw each runningin on load. These power &control cables runs from power house to switchgear room through these trenches in which water remains most of the time. pl explain its merit & de-merit
where can the transformer having vector group Yny0 be used??
how can i apilly for electrical c licencese.sir,i completed B.Tech in electrical & electronics engineering in 201onot working any company
A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
what are the disadvantages in GIS over AIS
Where voltage are high and current to be interrupted is low the breaker preferred is:
Determine a suitable number of slors and conductors per slot for the starter 1 winding of a 3 phase, 3300 V. SO Hz 300 rpm alternator. The diameter is 2.3 m
How to Calculate Current Rating of SDFU (Switch Disconnector Fuse unit) for Protectionof Capacitor Bank connected to Busbar of 800Amp,in LV side of 11/0.433KV, 250KVA Transformer?
Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,
What is the disadventage of gland earthing(power cable) if any. ?
What is the difference between a Root Locus plot and a Bode plot?