Answer / ravikumar.g

If the transformer oil dielectric strength is low we do the
Oil Filtration. ofter the oil filtration we tested the oil
by using the testing unit it will show 80 KV. if the oil
was fulley Carbonised so we have to replace the oil.

Answer / alex

Transformer Dielectric oil is tested in a Test Cell, I have
a few of them at home that I inherited from the origional
designer of the test. They look like a thermos flask and you
fill them with a bit of the oil from the transformer and
insert a center section that sits 2mm away from the surface
of the inside of the flask all around (2mm dielectric gap
all round). It is held there with glass / Mica supports. 2KV
is then passed between the inner and outer surfaces (via the
oil) to test its dielectric strength. A high voltage bridge
is normally used to get accurate resistance readings. If
dielectric strenth is low due to contamination it is replaced.

in ONAN type transformer winding temperature is lower than oil temperature at evening time but morning winding temp is higher than oil temp what is the reason?

2 Answers   Areva,

---

what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

0 Answers  

---

will the power consumption remains the same when speed of the fan cnanges??if so y??

2 Answers  

---

what is the resistence of human body?

3 Answers   BBC, NTPC,

---

How to work definite,over pluxing,revers power,OSR relay

0 Answers   Ford,

---

why supervision relay is used in incoming feeders?

1 Answers  

---

Why nutral wir used thinner than phase wire

3 Answers  

---

how step up transformer step up the voltage and what is the reason behind it?

3 Answers  

---

If 22 KV HT line, Current transformer is 25/5 then how to calculate multiplying factor.

0 Answers  

---

what is the function of mccb?

6 Answers  

---

What is C2-M2-E2 class in circuit breaker. why and where it is to be used in circuit breaker

1 Answers  

---

hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?

0 Answers  

---