Answer / jadhav padmakar

DGA Means Dissolved Gas Analysis. While in service
Transformer undergoes various termal,chemical,electrical
stresses due to that some gases generated these gases known
as Fault gases which r quantitified in extremely low level
in Parts Per Million (PPM), the test which is conducted to
analyse these fault gases known as DGA Test.

Answer / pundlik wanwe

Transformer oil is a mineral oil. It is either parafinic
based or napthaline based. Oil contains the hydrocarbons.
When the oil get heted depending upon the temperature rise
oil gets decomposed and gassed begins to evolve.
To analise the composition of the evolved gasses the method
used is called Dissloved Gas Analysis.
Evolved gasses involves Hydrogen, Carbon monoxide, carbon
dixoide, methane, ethane, ethelyene, acetylene etc.
The samples oil is used to pass through the gas
chromatography where as per the temerature rise gasses
evolved can be seen as a spectrum band.
This method is a nice tool to judge the condition of oil in
transformer subsequentely that of transforrmer winding
insulation.

Answer / anil kumar

DGA Means Dissolved Gas Analysis. While in service
Transformer undergoes various termal,chemical,electrical
stresses due to that some gases generated these gases known
as Fault gases which r quantitified in extremely low level
in Parts Per Million (PPM), the test which is conducted to
analyse these fault gases known as DGA Test.

why we use 3 phase in our country?..why no 4,5 or 2??

2 Answers   Siemens,

---

why CRGO material used in transformer?

2 Answers   Honda, Yazaki,

---

what is the maximum load in MDB,SMDB and DB

1 Answers  

---

Which motor has high Starting Torque and Staring current DC motor, Induction motor or Synchronous motor?

5 Answers   BSL, Elite, TTA,

---

What are the safety devices on Cumins Diesel Generators from 500 kva to 1500 kva.

1 Answers   Maruti Suzuki,

---

What would be the ratio of a Delta-Wye tranformer having 48000 volts phase to phase on the primary and 4160 volts phase to phase on the secondary?

5 Answers  

---

when we connect the capacitor banks in series with the circuit?

3 Answers   Cipla,

---

want happens when a dc is given to a commutator

2 Answers  

---

Iam deepthi.i completed my b.tech from electrical engineering.i want to prepare for civil services.i dont have much knowledge about these exams,but i have great zeal of cracking exams.plz provide me suggestions to which options i can select for optionals

7 Answers  

---

WHAT IS THE CONDITION FOR OPERATING DIFFERENTIAL RELAY IN POWER TRANSFORMER & WHERE IS NEUTRAL CT PLACED IN TRANSFORMER

2 Answers  

---

why dc motor is called constant flux motor?

1 Answers  

---

I have a table fan of Rallifan Make. When I overhauled it I found a stator winding and an aluminum die cast rotor. So it is supposed that it is a 1 phase induction motor. But there are only two terminals coming out and there is no capacitor. Can any one tell how this motor works? or which type of this motor is?

1 Answers  

---