Answer / ankamsreekar

Transformer oil, or insulating oil, is usually a highly-refined
mineral oil that is stable at high temperatures and has
excellent electrical insulating properties. It is used in oil
filled transformers, some types of high voltage capacitors,
fluorescent lamp ballasts, and some types of high voltage
switches and circuit breakers. Its functions are to insulate,
suppress corona and arcing, and to serve as a coolant.

Well into the 1970s, polychlorinated biphenyls (PCB)s were
often used as a dielectric fluid since they are not
flammable. They are toxic, and under incomplete combustion,
can form highly toxic products such as furan. Starting in
the early 1970s, concerns about the toxicity of PCBs have
led to their banning in many countries.

Today, non-toxic, stable silicon-based or fluorinated
hydrocarbons are used, where the added expense of a
fire-resistant liquid offsets additional building cost for a
transformer vault. Combustion-resistant vegetable oil-based
dielectric coolants and synthetic pentaerythritol tetra
fatty acid (C7, C8) esters are also becoming increasingly
common as alternatives to naphthenic mineral oil. Esters are
non-toxic to aquatic life, readily biodegradable, and have a
lower volatility and a higher flash points than mineral oil.

Answer / guest

phyro chlore

Answer / babu

phyro chlore

what may the reason for vector shift in a generator?

0 Answers  

---

IF WE SELECT THE 60H FREQUENCY IN INDIA WHAT WILL THE GOOD AND BAD EFFECT ?

3 Answers  

---

What products have you designed which have entered high volume production?

0 Answers   Intel,

---

what is difference between 9kv 5ka surge arrester and 9kv 10ka surge arrester.

0 Answers   Voltamp,

---

what is the function of conservater in transformer

3 Answers  

---

can i use the six sigma method which is used in management area, in state estimation of power systems?

0 Answers  

---

how to mesure the earth pit value and what is the minimum value of single earth pit?

3 Answers  

---

what is the instrument used for measuring insulator RESISTANCE

5 Answers   TATA, Transco,

---

I have lowered a submersible pump having 100 LPM discharge & 130 Mts. Head, 15 HP rating on borewell. After lowering 108 Meters, It is taking 39 amps & blowing the fuse. Can someone put light what is the cause behind it ?

1 Answers  

---

what is the maximum load sutiable from earth to phase and what is the max voltage earth to phase suitable

1 Answers  

---

whta is difference between contactor and breaker.

6 Answers  

---

what is the voltage between the earth & neutral 2 is there any continuity TO BE between earth & NEUTRAL

3 Answers   Suzuki,

---