Answer / mrudang

in DG

i am answering about transfdormer
PRD (pressure relief device) using also in transformer
the function remain same
when the fault occcures in transformer , the oil pressure ,
tank mechanichal preessure affect the transformer ,
when fault occurs the oil temperature is high , and ur oil
expands and pressure will be increase

so u use the PRD for relese the pressure of transformer

Answer / dinesh (techie.dinesh@gmail.co

whenever the pressure in the transformer tank increases, the
pressure is released by PRD. PRD reduces the pressure by
splashing the oil outside the tank, i.e the PRD has a preset
value, if the value exceeds beyond the preset value, the prd
comes in action.

and when the PRD reduces the pressure, the vertical
flap/flag mounted on the PRD raises. although the pressure
is reduced, the flap wont lowered, it is used to indicate
the supervisor/operator that the pressure value has
increased. once the operator get noticed, he will manually
lower that flap

Answer / sunil guru

elobrating the above answer..
pressure relief valve is used alonge with the BUCCHOLZ RELAY..
whenever there is an incipient fault in transformer due to
oxidation the gases are produced in the oil ... which expands
the oil so to auto relief that valve we use pressure relief
valve...

regards

for measuring current and etc.,why we use value of 1.732 in three phase calculation. not in single phase.why

3 Answers   Bhel,

---

how to define vector group of transformer

1 Answers   Engro, Reliance, TATA,

---

what will happen if multimeter(selector switch at DC voltage) and terminal at current is connected to DC supply?

0 Answers  

---

how can calculated the rating of the 11 KV transformer?

6 Answers   NBCC,

---

How to work to the x'mer as a induction motor?

1 Answers  

---

---

what is used root two in single phase line?

1 Answers   DVC,

---

what is transformer

5 Answers   Aegis,

---

what is a,b,c,d checks diesel generator?

1 Answers   AFMC,

---

what is the purpose of starter in tube light?what is it operation .

1 Answers  

---

We have 2 Nos. Transformer with the capacity of 2000KVA and 1250 KVA and currently using only one 2000KVA T/R during operational hours while non- operational hous 1250 KVA T/R also used to reduce T & D losses. Similarly, 2 capacitor bank of 500KVAR and 300 KVAR also installed to balance reactive power. Now problem is around 1000 KW load PF is not maintaning 0.99 as 350 KVAR capacitor is in healty condtion. Now the PF is maintain 0.95 to 0.96.

2 Answers  

---

why single induction motor is not self starter?

3 Answers  

---

what is the use of excitation transformer in LAVT PANEL?

2 Answers  

---