Answer / j

What is nitrogen hydrogen method of cooling!
Outrageous answer!

100mva transformer is cooled by ofaf. Oil forced,
air forced. You have pumps for circulating the oil
from the main tank to the radiators, and then fans
to cool the radiator banks. There is no such method
of nitrogen+hydrogen cooling of transformers.

Answer / baswaraj

By ONAF(Oil natural air forced) Method or by
nitrogen+hydrogen mixtutre.

Answer / rvg

Yes there r such methods of liquid nitrogen and Hydrogen
cooling of transformer. These methods are costlier and
efficient, and requires sofisticated instruments.
This is the only method for high capacity transformers,
alternators engines etc.

Answer / khalidshaikh

100 MVA POWER TRANSFORMER COULKD BE EFFECTIVELY COOLED AS
UNDER WITH.

OFAF ( TANK OIL FORCELY MOVED TOWARDS RADIATOR AND NATURAL
AIR FORCELY COOL THE RADIATORS WITH SERIES OF FANS/ BLOWERS.

Answer / maharajan

ofaf

Answer / aruna devi

ONAN-OIL NATURAL AIR NATURAL,AFAN -AIR FORCED AIR NATURAL

Answer / khalid hussain shaikh

THIS TYPE OF HEAVY POWER TRANSFORMER COOLED BY THE FOLLWING
PROCESS.
1. ACTUALLY OIL IS THE MAIN INSULATION MEDIUM BETWEEN CORE
AND TRANSFORMER BODY.
2. OIL CONDUCTS HEAT FROM CORE/ WINDING TO BODY AND
RADIATORS.
3. BY METHOD OF ONAF, HEAT OF TRANSFORMER RADIATED BY
COOLING FANS.
4. IN ADDITION TO THIS WITH OFAF, PROCESS HEAVY PUMPS
CIRCULATES TRANSFORMER OIL TO RADIATORS AND FROM RADIATORS,
HEAT FURTHER , RADIATES AND COOLED FROM AMBIENT
TEMPERATURE.

Answer / d b pathak

BY ONAF

Answer / jagjeet singh solanki

100 MVA TRANSFORMER OF AREVA AND ABB AND EMCO COOLED BY ONAN AT 80 MVA AND ABOVE THIS ONAF METHOD.

what is different between earthing and grounding for a electrical eqipment ?

2 Answers   BARC, Omega Maritime,

how do u get less voltage in star connection

4 Answers   BARC,

How can we get a Neutral from a three phase suply? If we meet all three phases at a point to take neutral then why dont thay get sparked?

1 Answers  

which level of transformer oil has got low dielectric strength ?why?

2 Answers  

What is the meaning of dsl line in eot crane , and why it is Called down shop lead ? Pls tell exact answer.

3 Answers  

Why LVDT have secondary windings connected in differential 1. Higher out put 2. Based on the out put voltage-/+, helps to identify the direction of displacement 3. To establish a null/ reference point

1 Answers   GATE, PSPCL,

what is Over current, earth fault (O/C+E/F) ?

2 Answers  

is it possible to convert electrical energy to light energy for transmission purposes?

7 Answers  

Even motor protection, why motor burn out ?

1 Answers   Indorama,

why can't we increase the voltage by increasing the field voltage in order to get higher voltage.so that we can eliminate step up transformer

4 Answers   Bhel,

In order that work may be done:(a) Two wires are necessary(b) The circuit must have a switch(c) Coal must be burnt(d) A supply of energy is required

1 Answers  

How to calculate the phase to phase clearness of HT /// LT bus bar?????

0 Answers