Answer / pillay

It is transformer oil dielectric breakdown voltage.
A sample of the tx oil is collected and tested with a
special tester. In the tester is a pair of electrode spaced
as per BS
spec. A TEST VOLTAGE IS APPLIED ACROSS THE ELECTRODES , and
this voltage is gradually increased until a breakdown
happens resulting in sparks across the electrode, immeadetly
the test voltage is stoped and the RMS voltage is
calculated.A few test is carried over and the mean voltage
is taken as the breakdown voltage of the sample oil under
test.

It is flash point of oil.The flash point is at what temp the
oil would self ignite. This depends on the quality and type
of oil.

what is the generation action and motoring action?

3 Answers  

---

what is the safety of voltage power transformer(2250KVA0

0 Answers   Emerson, Jindal,

---

What is meant by TAN-DELTA test carried out in motors?

3 Answers  

---

Megar test tell sufficient resistant

1 Answers  

---

List of equipments required foe industrial repair lab.

0 Answers  

---

a power supply to be constructed from voltage cells is required to provide Max. 20A Current with a terminal voltage of 6v.Several voltage cells are available each of which has terminal voltage of 1.5V & each of which can supply a max current of 5A .the no of cells required will be ??

5 Answers  

---

Why inductors are installed in electrical circuits?

0 Answers  

---

why ups in kva ratings?

2 Answers  

---

Differentiate between low pass, high pass and band pass filter?

0 Answers  

---

how can we know cable size for a given current? if any one have catalogue plz mail to vijay_raju369@yahoo.co.in

5 Answers  

---

hot water tank,top element 240v across,the bottom 120v across,why?

1 Answers  

---

what is closing resistor in circuit breaker? why it used?

3 Answers  

---