Voltage transformers are occasionally used to adapt voltage protective relays and instruments with nominal voltage of main circuit in low voltage switchgears.

A power transformer manufacturer which was located in economical boycotted country met some problems in material provision.

A power transformer manufacturer decided to decrease their production budget by reduction of material amount used in transformer construction.

Regarding to physical size of national power systems, rate of power exchange and transmission lines capacity are increased by using of high voltage technology.

As you know, because the B/H curve of the magnetic material forming the transformer Core is not linear.

Our utility specifications calls for VTs of burden 100VA. As the connected burden is low and due to switchgear compact designs (for indoor applications), manufacturers are offering VT of burden 30VA or less.

In an industrial project, the customer decided to change first order for new power transformer.

we face a problem that our generator output terminal has a phase sequence U-V-W (clockwise) but the transformer terminals arrangement is W-V-U (anticlockwise) with a vector group Dy-11.

A 3-core cable was installed to supply a DC UPS system and it was realised they actually needed a 4-core cable , 3 phase & neutral.

Transformer No1 is having Primary tapping for 11275V and at secondary 445V v getting. Similarly  Transformer No 2  tapping position is at 10725V and at Secondary 415V v getting.

I was carrying out a fault current distribution for an earthing design for a primary or zone substation when I found the transformer to be used was Yyn0 (33/11 kV). Apparently the lines company here have many substations with these transformers.

R core transformers are very popular in control circuits due to the advantage of negligible leakage of flux.

Hi I was hoping someone can assist me with some information regarding methods for detecting partial discharge in transformers and power cables.

please help!!!!!!! i need to to know the advantages and disadvantages of an air gap on a ferrite core, of a transformer.

Can i used step down transfprmer 6.6KV/415V as a 415V/6.6KV application area?

Which kinds of factor affected for this job?

How the electrical energy flows from one side of transformer to other side?

Is there any special recommendation for converter transformers sizing?

How can we do power transformer insulation resistance test as an acceptance test?

How do the transformer vector group influence on permissible neutral loading and level of system ground fault currents?

For making of a current injection source with 2000 A rating current, can we use an ordinary current transformer with ratio 2000/1 A, and connect 1 A side to one ordinary low current injection source ( 1 A) for obtaining of 2000 A in other CT side?

What parameters shall be checked in power transformers parallel operation?

2700kVA 33000/1050 volt
Dd0 and Dy5 configeration cyclo convertor transformers generating large amounts of hydrogen gas. Various modificationd to the clamp config have been done the Dd0 as proven to be a succes but this hasnt worked on the Dy5.

Optimum pulse in Rectifier transformer
In a erectifier transforemr it is preferred to go for more and more no of pulse operation . For example in a Bridge configuration 48 pulse operartion is adequate .

Whether a Tertiary winding is essential in  a 3 phase 3 leg power  transformer and not in 5 leg configuration ?

Is there any link between Odd Harmonics causing Partial Discharge in Medium/High Voltage ( in this case 15 KV ) Cast Resin Current Transfomers , Voltage Transfomers or Power Transformers.

I got the below of the Internet, what I want to know is the following, will the noise being measured be different in auto than in manual, will the noise also be different if the tap changer is in different settings in manual i.e. 3,5 or 6

Why cannot we use whole of parallel power transformer bank capacity for power transfer in practice?

Can somebody share the  experince of a 100 MVA 220 kV class transforemr working at a continuous  oil pressure of 4 kg.

Can a tertiary winding on a power transformer be used for station supplies? if so how is its connection to the auxillary transformer. what other use does it have other than 3rd harmonic suppression and compensation for unbalanced loads.

On a substation 3 phases tranformer 34500 V / 480-277 V, I would to know what is better or recomended.

A 20 MVA transformer can be change to 25 MVA is possible without change in the winding?

I have created a model of a transformer comprising a figure 8 core with face 1 of the primary and face 1 of the secondary coils in the first 'hole' of the figure 8 and ...

i want to know how we detrmine (ngr)value in power transformer protection.

How to design a choke/reactor for 3phase 18amps 1.1mh

How to design a three phase to single phase transformer for 10kva 415v/230v it is possible?

I know basic equation for Arc furnace trafo cal Q= m C . delta T
Can anybody explain what the major consideration for Arc furnace trafo calculation is?

Are there any recommendations for power transformer reactive compensation?

Is the megger test necessary for new power transformer and are there any accepted values for measured megohm in insulation resistance test?

Load calculation for t/f and cable capacity determination of /cable size for any load.

How do u choice a Transformer Being a Client?

How we can calculate the total power transformers capacity which are installed in parallel?

How do you model a single coil of a Power transformer?

In Oil or Dry Type Transformers, Why do they lay 7×1Core Single Core 800 or 630 Sq.mm Cables Instead of 3×Core cables like the Primary Side of the Tx.

I need to harvest power from a high voltage line using the Faraday's law. i.e. whenever current flows in a conductor, magnetic field is produced around the conductor.

Which side of a loaded transformer contains the magnetizing current?

During magnetic balance test in auto transformers, It is experienced that ...

Paralleling of two tramnsformer with various secondary group vector, is it possible?

Anyone can teach how to calculate the temperature rise of the transformer,especially for up to 20kVA?