Free Online HT/LT Transformer Design/CT Design/Auxilliary Transformer Design Now use our free online transformer design data calculator and get the design parameters instantly. You can design any type of transformer now - be it HT transformer, LT transformer, dry type transformer, oil type transformer, step down transformer, step up transformer, furnance transformer, isolation transformer, control transformer, auxilliary transformer, current transformer, CT, servo transformer design, copper (Cu) winding transformer, aluminium (Al) winding transformer, high voltage transformer, special purpose transformer welding transformer. You get winding data, estimation, temperature rise in transfprmer windings, oil temperature rise, axial forces, radial forces, tank design data, oil quantity calculation, GTP, winding data sheets. So you get every thing online instantly.

Oil Filled & Dry HT Transformer Design Software
3 phase, 50/60 Hz, 5 KVA to 100000 KVA (100MVA) @ 132/66/33/22/11/6.6/3.3/0.433/0.250 kV

We also have:
1- HT Transformer Tank Design Software. Know more...
2- HT Transformer Core Design Software. Know more...

HT Distribution and Power Transformer Design Software (Online & Offline Version)
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.

Data Input Window: To make a new design just input basic parameters like KVA rating of transformer, HT voltage of transformer, LV voltage of transformer, impedance of transformer, load losses of transformer, no load losses of transformer, flux density of transformer and leave rest upon the software to take default values like various clearances, conductor insulation, LV turns, HV turns, stacking factor, space factor, parallel conductor etc., to make a design for you. The current density is calculated automatically depending upon the load losses you have entered but later on you can set your own value for current density. Run the software in auto-mode. Check the results and if you are not satisfied and the results are not matching with your specifications, change the default values as per your specifications to get the desired results. Its an open plateform software, you get results as per your requirements.

Optimize your design to get:

- Desired costing of transformer - Desired losses - no load losses and load losses in transformer - Desired outer (tank body) dimensions of transformer - Energy saving & energy efficient transformer

Core Lamination Chart: You can design the core in 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 steps. Design a rectangular core or round core transformer. The three phase transformer are stacked core type. Single phase can be designed in core type as well wound core type. The stack width & stack height is adjustable. The specific core losses are calculated through the specific core loss cure. Different core grades are available to choose from - M5, M4, M3, M2, M1. The software calculates the core weight stack wise, the total no of blades per stack, width of each blade and lenght of each blade.

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,

Core Yoke Design Options : Designer can choose the round yoke or flat yoke. The core core section may be round or rectangular as per your design requirements. The transformer may be core type stacked core or shel type wound core. In case of a rectangular core transformer the coils are also rectangular. The designer has the option to change the stacking factor and space factor. Designer can choose different thicknesses of core while designing a trnaformer. The thickness may be 0.36mm, 0.33mm, 0.30mm, 0.26mm, 0.18mm. The core weight changes accordingly. The core CRGO type.

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.

HV Cross Over Winding: The designer can choose to design a cross over HV coil. The number of coils per HV limb can vary from 1 to 36. The wire is round. You can put oil ducts in between layers of coils. The number of spacers between coil to coil can be put as per the design requirement. The software calculates the weight of copper with insulation and without insulation. The thickness of conductor insulation can be changed as per the design requirements depending upon dry type or oil type, voltage class, kva rating of transformer

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."
The transformer design software uses universal formulae and equations to do the calculations to design a transformer. The operational manual or handbook or book describe the complete operation to an engineer on how to use the transformer design software. The transformer design engineer can input the design parameters as per the required specifications. Its an engineer's calculator to design a transformer.

HV Disc Winding: You can also design disc type HV winding. Number of discs per limb depends upon the design requirements and the degigner's experience.

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.

Transformer Tank Design : You get the tank drawings automatically. the software also generates the fabrication drwaings for conservator tank, HV LV connection boxes, marshalling box, side. The radiator may be conventional elliptical tube type. PSR (pressed steel tube) and corrugated type. The software calculate the total heat to be dissipated and hence the total number of radiators required.

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. The transformer design software uses universal formulae and equations to do the calculations to design a transformer. The operational manual or handbook or book describe the complete operation to an engineer on how to use the transformer design software. The transformer design engineer can input the design parameters as per the required specifications. Its an engineer's calculator to design a transformer.

The transformer design software uses universal formulae and equations to do the calculations to design a transformer. The operational manual or handbook or book describe the complete operation to an engineer on how to use the transformer design software. The transformer design engineer can input the design parameters as per the required specifications. Its an engineer's calculator to design a transformer. Softbit has also tied up with two workshops in Haryana & New Delhi for repair, rewinding & trouble-shooting of HT Power Transformer. So please contact us regarding your query on transformer repair, rewinding and trouble shooting. .