Answer / pradhyumn

Buchholz relay is installed between the pipe connecting the
main tank & conservator. It indicates about the incipient
(initial) faults like insulation failure, core heating, and
fall in oil level due to leakage joints.
During initial faults when oil in the main tank decompose,
hydrogen gas is produced as result whose volume is more
than 70%, so this gas as result of being lighter tries to
escape to the conservator which is at the top, but gets
caught in the buchholz relay, where when determined amt. of
gas is accumulated, it gives the alarm of gas surge.

During major faults when enormous amount of gas is
released, this causes the oil surge which enters the
buchholz relay & thus due to this oil surge the causes the
circuit to trip as this being the major fault.

* Used in oil and gas surge protection.(plz. forgive
spelling mistakes.)

What are the advantages of nichols chart?

0 Answers  

---

What is the difference between earthed & unearthed system?

2 Answers   HCL,

---

wath is this mining of bts

1 Answers   Nokia, TATA,

---

How to operate a ac chilar plant?

0 Answers  

---

how the 3phase induction motor is running in 2phase supply with help of capacitor?

1 Answers  

---

types of motor starter

5 Answers  

---

what happen if one of 3-phase line has a much higher load when we are using delta to star transformer? how we can over-come from that?

2 Answers   Getco,

---

How conventional fire alarm system works?

1 Answers  

---

why indicated sypply only by 440V in 3-phase system.

2 Answers  

---

what is diffential relay? testing proceure?and transformer reach Over load thet time differencilal relay operate or not ?

5 Answers  

---

what is the ideal earth resistance

11 Answers   Amit Enterprises, Enercon,

---

What the reson for frequant instantaneous ground over current fault in our sync. Generator... 15 triping in 24 hr...

1 Answers   HCPL, Jhunjhunwala Vanaspati Jhoola, Regen Powertech,

---