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Oil
Filled & Dry Transformer Design
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HT Distribution and Power Transformer
Design Software
This transformer
design software can get you the design parameters
along with CAD developed images of different transformer
& core assembly parts dynamically. This CAD feature
helps you to confirm and check the authenticity of computer
generated design parameters. Design oil filled &
dry type
transformers with one software. More over this software
can also be customized as per your requirements.
Version -
1072 
If you have already
purchased any of our transformer design package
then send full package downloading request
to - Softbit
- Support. Please mention your
bill no., date of bill and package purchased.
In case you already
have version - 1072 then please download the
updates from the following link. |
| Transformer Update:
Download
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Updation Date: 04 April,
2008
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| Transformer Operational Manual:
Download
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| Download
Free sample files (*.tdr), 11/0.433
kV & 33/0.433 kV |
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10kva.tdr
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63kva.tdr
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250kva.tdr
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500kva.tdr
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1250kva.tdr
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2000kva.tdr
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Version -
1065
| Transformer
Update: Download
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Updation Date: 10 Nov,
2007
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| Transformer Operational Manual:
Download
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Optimize
your design to get -
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Desired costing of transformer |
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Desired
losses - no load losses and load losses
in transformer |
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Desired
outer (tank body) dimensions of transformer
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Energy
saving & energy efficient transformer
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Free
Download - Data Sheets for a 11/0.433
KV, 1000 KVA Distribution Transformer*
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How does transformer design
software work?
1 - Just
enter the KVA rating, Impedance, NLL (No Load Losses),
LS (Load Losses), select the flux density and press
the "Auto mode".
Within seconds you get various design outputs just showing
you the core and copper weights depending upon the entered
impedance value. Select any set of values as per your
preferred tolerance and you get the complete design
data of the distribution or power transformer (clearances
and certain other values are added as default values
but you can change as per your requirements),
2 - Still
you have the "Manual" mode to change and fine
tune your design as per your requirement (if desired),
3 - Change
no. of HV coils/discs per limb, size of HV/LV conductor(s)
- both round conductor and strip size, no. of parallel
LV conductors,
4 - You
can reset various clearances, change current density,
conductor insulation as per your requirement and client
specifications,
5 - Select
HV winding type - Cross Over to Disc winding and vice
-a - versa,
6 - Tapping
details for OLTC and Off Load Tap Changer upto 25 steps.
Enter any + step value through - step @ any % step value,
7 - You
get values of Axial and radial forces developed in the
windings during short circuits, temp gradients for HV
and LV, Thermal Time Constant and ability to withstand
shortcircuits with winding temperature rise,
8 - Pressed
Steel Radiator (PSR) data calculation added you get
automatic fixing dimensions of radiators - section width,
CD and no. of fins. Options to select 226, 300 and 560
width sections. Tank drawing details are generated automatically.
9 - Feature
added to get winding data for an old transformer
10 - GTP
(Guaranteed Technical Particulars), Core details, core
& winding assembly details, estimation and costing
sheets are generated in the 'Word Format' for easy access,
printing and sending the same via email to clients for
approval, in house departments like design, QC, purchase,
estimation, production, despatch. So this distribution
and power transformer design software saves time, energy
and revenue. A must key tool for transformer design
and training professionals and engineering students.
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Free
Download - Data Sheets for a 11/0.433
KV, 1000 KVA Distribution Transformer*
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| *
These
data sheets are for study only and just to give
you an idea that how you get the design parameters
in word formate. Please do not use this data to
manufacture a distribution transformer as we do
not stand any guarantee. |
Factors controlling and affecting
the design of a transformer
Principle
of operation of a transformer
"A transformer is a static machine which works on
the principle of mutual induction. When a coil is placed
in the vicinity of an other coil, an emf if generated
in the coil with the change in rate of magnetic flux associated
around the other coil."
So all the transformer whether a HT transformer, a distribution
transformer, power transformer, stepup transformer, stepdown
transformer, auto transformer, furnance transformer, induction
transformer, rectifier transformer, power supply transformer,
auxillary transformer, control transformer, audio transformer,
frequency transformer, EHT transformer, oil filled transformer,
dry type transformer, current transformer, potential transformer,
copper transformer, aluminium transformer, off load transformer
and on load transformer all work upon the above said principle
of operation of a transformer. The magnetizing core is
a very essential part of a transformer. To get the preliminary
dimensions of transformer core we first need to know the
specifications of a transformer like - type of transformer (a number of transformer types are mentioned above), rating
of transformer in KVA, number of phases of transformer,
rated voltage for primary winding of transformer and secondary
winding of transformer, the operating frequency of transformer,
the vector group of transformer, short circuit impedence
of transformer, no load losses of transformer, load losses
of transformer, tapping requirements for transformer.
The dimensions of the core of transformer are closely
connected with the dimensions of other transformer parts
like winding of transformer. The emf per turn of a transformer
is one of the most important values defining not only
the dimensions of a transformer, but the number of transformer
winding turns too. This also influences the value of transformer
short circuit impedence, the transformer weight and transformer
losses etc.,. The transformer design flux density in a
transformer leg depends upon the grade of CRGO core laminations
that would be used in the transformer manufacture. For
transformer core grades M2 to M6, the transformer design
flux density is taken between 1.5 Tesla to 1.7 Tesla.
Proper cooling methods must be adopted in higher rating
distribution and power transformer. In HT transformer
and EHT transformer, the insulation type and value should
be calculated and choosen carefully. Total losses in a
transformer are no load losses and load losses. As transformer is a static machine so no windage and frictional losses
occure in a transformer. The temperature rise in a transformer
is due to load conditions of transformer, surrounding
environment of transformer, purity and cleaniness of transformer
oil. The cooling surface of transformer tank must be calculated
care fully to avoid over heating of transformer windings
and transformer oil resulting in rise in transformer body
temperature. The operational frequency of transformer
also affects the temperature variations in transformer.
So the transformer must be operated close to its designed
frequency. The transformer temperature can also be reduced
by care fully designing the transformer LT winding as
to use many parallel insulated conductors instead of a
single solid conductor. The HT winding transformer coils
and LT winding transformer coils should have oil ducts
in between layers to transfer heat generated in the HT
winding transformer coils and LT winding transformer coils.
The core laminations of a transformer are varnished and
insulated from each other to reduce eddy current loss
in a transformer. This also attributes in reduction of
transformer temperature. The no. of transformer radiators
are also calculated carefully. Forced air is also used
to lower down the transformer temperature in case of large
capacity power transformer. A transformer is provided
with a temperature gause to measure and indicate the transformer
oil temperature. In case of an abnormal condition a transformer
protection relay called buchloze relay is provided in
between the transformer tank and transformer conservator.
All above design calculations are done by the transformer
design software which also takes in consideration the
tolerances, makes validations if some transformer design part goes wrong.
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