What is ONAN/ONAF1/ONAF2 for transformer cooling

Answer Posted / gowhar

The above answer is true.Moreover ,there is a two stage
forced cooling in some of the transformer
(ONAN/ONAF1/ONAF2.on First stage forced cooling(ONAF1) the
MVA rating increses 33% of the actual rating and on second
stage cooling(ONAF1) MVA rating increases to 66% of the
actual rating.

Is This Answer Correct ?    98 Yes 34 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)

1529


Define norton equivalent circuit?

607


What is current divider rule (cdr)?

821


1.why are not using acb 33kv ht side? is there any problem 2.what is difference between acb,vcb,sf6 breackers? 3.what is the function of invertor and convertor in ups?

1683


What is the difference between rated and per unit in transformer?

1696






how to remover corona effect and hysteresis losses from contactor

1557


how to calculate the magnetizing current of ct ( 800A/1A) for Relay 64

1036


Why use in ht motore

1250


WHY THE RATINGS OF THE TRANSFORMER IS 33KV WHY NOT OTHER???

1918


Explain the propagation of harmonics in the network and influence of phase angle of harmonics.

1493


how can we say that stator magnetic field rotates with synchronous speed?can we derive?

1294


How to work E.L.C.B and how to connect in circuit.

1520


ACB & VCB how do work and saftes and how can maintenance in this and parts name show with picture

1629


How to determine alternating current frequency?

685


how many synchronous motor are there in any power plant

1473