How do we check transformer losses and what are the ways to
minimise it.
Answers were Sorted based on User's Feedback
Answer / guest
transformer losses can be found by doing open circuit test
and short circuit test
open circuit test gives the core losses
short circuit test gives the copper losses
note in open circuit test the lv side is given supply and
in short circuit test the hv side is given supply
the iron losses can be reduced by providing laminations of
thinner dimension and using c.r.g.o sheet for laminations
the copper losses depend on the winding resistance which
increases due to heat can be reduced by providing
sufficient cooling to the winding.
Is This Answer Correct ? | 36 Yes | 2 No |
Answer / manthesh.patil
we can check transformer losses by short ckt and open ckt test
,for checking cu loss we use short ckt test and for iron
loss we use open ckt test..to reduce copper loss we should
go for good cooling and for iron loss the core should be
perfectly laminated
Is This Answer Correct ? | 26 Yes | 4 No |
Answer / sumitgarg
we can check a trans losses by open circuit and short
sircuit test.
to minimise these losses we shuold have a good cooling
system. apart from that all other points are related with
the insulation of the core,permitivity etc.
Is This Answer Correct ? | 27 Yes | 10 No |
Answer / achala.g.s.
We can check like the following :
polarity, resistance and tap change operation tests should me made to check whether it has built correctly or not..
the ways to minimize it are:
*check of Oil quality.
*A check on the tap changer.
Is This Answer Correct ? | 3 Yes | 1 No |
Answer / saravanan
oc and sc test helps to find the total losses means .oc test
gives the core loss .sc test gives the copper loss.if the
transformer is oil cooled means you must check the
conduction or breakdown test on the transformer oil. that
time only we can suggest the winding insulation loss
Is This Answer Correct ? | 2 Yes | 7 No |
how make megger test for control cable like 12c x 1.5mm and what it apply voltage and test timing details.
IN SINGLE PH TRANSFORMER IF LEKAGE IMPEDANCE DROP IS NEGLECTED ,THE FLUX IN THE MAGNETIC CORE and the lekage flux linking a winding are a)proportional to the applied v to the winding i respectively.
This is reqd for a 1MW Solar power plant..We have 2DC outputs from the solar panels Connected to 2INVERTOR panels.. Output from invertor is 3ph,280v,500kva,50hz.These are connected to individual ACB.This has to be stepped up to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT BY USING a single two winding 3 ph transformer 11kv/1250kva. or (2)use the two outputs and connect to one three winding transformer of above rating..Pls suggestwith details.
How the cable size for a motor is decided
if we put a energy meter in 500 kvar capacitor bank ,then how much units show in energy meter per day.
what is load shedding
how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?
what are RCBO ?
What is the deffirant between EARTH, GROUND AND NUTRAL
what is the difference between ac and dc?
electricity bill multiplication factor 487.20xconsumption=total unit in kwh. what is 487.20 ?
how moving coil indicator works?