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.

WHAT IS LIGHTNING,HOW TO CALCULATE LIGHTNING DESIGN CALCULATION?

2 Answers   L&T,

---

How to improve fuel cell in a distribution system?

0 Answers  

---

How to convert KW to KVA or KVAR OR kvar/kva to kw?

8 Answers  

---

ELCBs are installed for protecting humans from AC leakage current.Is there a device which protects humans from DC Leakage current??e.g.leakage from batteries...If not,then why so???

1 Answers  

---

sir can you operated Transformer on frequency from that for which is design?

1 Answers   Kirloskar,

---

what is the meaning of pi value?

1 Answers  

---

DEAR ALL I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm but new local pwer is 220v 60 hz requierd rpm should be 1000 pleas what the beast solution is used frequncy converter or rewinding all motos or chang all motors thanks

6 Answers   GE,

---

How could I get a certificate of competency as Electrical Supervisor? I have completed By BTech in Electrical this year(2012) for VJTI Mumbai Maharashtra. Is it compulsory to be produced while joining?

0 Answers   ONGC,

---

how can see the ac indoor or out door ac which Tr

0 Answers   Wipro,

---

difference between ac series and parallel circuit

0 Answers  

---

How do you maintain the earthing resistance?

13 Answers   Birla, Ford, JLL,

---

Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?

0 Answers  

---