Answer Posted / dinesh (techie.dinesh@gmail.co

generally mineral oil is used and the other name is "CANOLA"

For large power transformer, "Silicone oils" are used. but
generally they go with mineral oils.,

regards,
techie.dinesh@gmail.com

what is the common earth

1068

---

Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.

2174

---

we have a lot of model of rectifier but thyristor rectifier is the most rectifier that use in power system. Do you know why this rectifier is used?

1771

---

does any one know where we can purchase insulation oil for high voltage oil filled cables

2326

---

what is mean by restructuring power system?

2056

---

What is difference between YNyn0 and YNyn ??

2542

---

iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

2241

---

relation between power station capacity and voltage level?

2043

---

-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.

2078

---

How to Calculate The Neutral Earth flat design calculation for the Synchronised generator (Gen 1-650Kva, Gen 2-725Kva

1644

---

what is the maximim current drawn by 1 phase and three phase welding machine

1852

---

In between UPS out going changer over switch and ups raising main input, both side cable gland producing heat but the cable doesn't get heat,Why?

2258

---

how to find ratio of CT & PT in 66/11kv 12 mva supply system ? explain with calculation.

2398

---

Why reactors use before incoming of ac vvfd drive?

1847

---

why the frequency and voltage in india is 230v and 50HZ. when compared to USA say 110v and 60 HZ.

1437

---