Answer / pradhyumn

OTI stands for Oil Temperature Indicator and WTI stands for
Winding Temperature Indicator. They are used for
Transformer protection.The temperature of winding increases
as the load increases. Oil is used as coolant for the
winding so as winding heats up oil temp. rises as well.
The life of transformer depends on insulating material
between the windings so it is important to check and
control the temp. OTI and WTI are thus used for alarm or
tripping of the transformers.

Answer / rizwan

A basic or Avg Difference in OTI & WTI are, :- WTI needs a
CT to function , While OTI does not need a CT. WTI has both
Alarm & Trip , Though OTI also has both ALarm & Trip , there
is also a OTI without Alarm & Trip . Its not the cas of WTI.

Answer / kolhe g j

10 Degree Centigrade

Answer / c.d.elkunchwar

There is no fix differnce as such.Itdepends upon the
transformer tempareture gradiant at that current, specified
by the manufacturer.the difference between ot&wt varies as
per load and gradient.Normally it can be from 12 to 16
degrees at full load.

Answer / k.prakashchandra

The above answer given by me is not true in all cases.Those
were the readings recorded on 220/110 KV auto
transformer.The WT is higher than OT as WTI is close to the
source of heat.The difference between WT and OT depends on
cooling and oil circulation.More the difference worse the
cooling efficiency.The difference is about 20 %(220 KV) to
40% (110KV) of temperature rise in WT ,as observed in case
of the above Tr.But WT of tertiary was found to be less than
the OT

Answer / k.prakashchandra

3-15 degree C

Answer / boss

it was correct answar, but ct current rating has been deppond on trasformer manufacture.

which type of winding is used for high voltage & low current?

1 Answers   GEB,

what is the safety of voltage power transformer(2250KVA0

0 Answers   Emerson, Jindal,

what s a servo motor? how to control the servo motor? and its application, purpose of using?

2 Answers   Arabian Pipes,

I WANT HOW CALCULATE TO CABLE FOR WELDING PLANT ?

0 Answers  

What is Plank's Law?

0 Answers   Godrej,

in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

0 Answers  

I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.

0 Answers  

A motor works on 30 killo watts.how much ampers will be required if it works on 440volts?

5 Answers  

Difference between ac parallel circuit and ac series circuit?

0 Answers  

Synchrounous motor is three phase motor,but its not self starting .why?

23 Answers   Delta Beverages, KI, L&T, NTC, TVS, Wipro,

What voltage is used in Directional earth fault relay? and why?

5 Answers   L&T,

Why is copper a better conductor of electricity than aluminium?

5 Answers   AES,