Answer / jyotirmaya

Normally test are done before installation and commissioning
of the transformer. The following test are done;
1. Visual Inspection
2. Insulation Resistance Test
3. Ratio Test
4. Vector Group Test
5. Magnetizing Current Test
6. Core Balance Test
7. Winding Resistance Test

Answer / p m tamhane

Polarity Test also an important before loading

Answer / rajan singh tanwar(j.k. cement

For Power
Transformers the
following Pre
Commisioning tests
are done:-

1.Visual Inspection
2.Measurement of IR
Value
3.Measurement of P
I Value
4.Measurement of
Winding
Resistance
5.Short Circuit Test
6.Oprn Circuit Test
7.Magnetic Core
balance Test
8.Voltage Radio Test
9.Oil BDV & Acidity
Test
10.Checking the
function of
OTI, WTI, OSR, MOG,
PRV
Relays
Last one for the
relay's testing but
it also comes under
transformer testing.

Thanks

How can we measure and monitor critical performance parameters of Diesel Generator Sets, both electrical and engine ?

3 Answers   Cologicx Systems,

---

Why is reating of t/f in kva but for inverter in kw ?

3 Answers   UPPCL,

---

Can a transformer designed for a particular voltage and frequency rating be used for different set of mentioned ratings? Assume that the winding does not get burnt because of overheating at higher voltage. If yes, then under which constraint it is possible?

1 Answers  

---

For 300MW and over a distance 250 km, what voltage be selected? and no. of circuit?

5 Answers   DPL, NTPC,

---

If Ac supply is given to the DC motor then what will happen? clear explanation

2 Answers  

---

How colour picturetube works & how many year it will works.

0 Answers  

---

why transmiision rating in kva?

4 Answers  

---

What type interview questions ask in Electrical technicians

0 Answers  

---

What is Partial Discharge test .Please specify that this test can be test on 11/0.433 KV,630 KVA Transformer.

1 Answers   NBCC,

---

How to do maintenance of transformer feeder.

0 Answers   KSEB, L&T, Siemens,

---

Pls tell me whether we can use EN3A material for shafts of Permanent magnet alternator.What will be the effect of magnetic and nonmagnetic material for shafts on magnetic properties of PM rotor .

0 Answers  

---

definition of transformer

10 Answers  

---