Transformer

The weight of conductor for any winding depends upon two parameters:Current carried by the windingNumber of turns required in the windingThus we can say that weight of conductor in a winding is directly proportional to its Ampere Turns i.e. MMF.Now, we will focus our attention on the weight of conductor ...
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All Day Efficiency is defined as the ratio of total energy output for 24 hrs i.e. for the whole day to the total energy input for the same day. All Day Efficiency is basically Energy Efficiency of Transformer calculated for a period of 24 hrs. Mathematically we can write, All ...
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A Transformer, in which a part of the winding is common to both the Primary and Secondary circuit is called an Auto Transformer. It shall be noted that in Two Winding Transformer, Primary and Secondary windings are electrically isolated but in Auto Transformer, the two windings are not electrically isolated.A ...
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BDV test means Breakdown Voltage Test. It is done for checking the dielectric strength of the oil of the Transformer. Dielectric strength means the maximum capacity to withstand voltage of insulating oil. This test shows the dielectric strength of Transformer oil.In transformer oil has mainly two purposes, first for insulation, ...
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Buchholz relay is a gas actuated protection relay which is generally used in large oil immersed transformers of rating more than 500 kVA. It is used for the protection of a Transformer from the faults occurring inside the transformer. A typical Buchhloz Relay is shown below.The gas actuated protective relay ...
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The modern loads are designed to operate at satisfactorily at one voltage level. It is therefore of great importance to keep the consumers terminal voltage within a prescribed limits. The Transformers output voltage and hence the terminal voltage of the consumer can be controlled by using tap either on primary ...
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Faraday’s Law of Electromagnetic Induction states that whenever there is a change in the flux linking through a coil, an emf is developed in the coil. Thus for production of emf, flux linking through the coil must change but for the flow of current through the coil, the circuit must ...
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Before going to the mark difference between Dry Type Transformer and Oil Filled Transformer, it is worth to have some discussion on Dry Type Transformer.Dry Type Transformer:Dry Type Transformers find use in locations where the use oil Filled Transformers increases the fire hazard such as shopping malls, Hospitals, residential complexes ...
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There are two types of Losses in an Electrical Machine. They are Core Loss or Iron LossOhmic Loss or Copper LossIn this post we will discuss about Core Loss. Core Loss is again classified into two types:Hysteresis LossEddy Current LossFirst we will have a look at how the core of ...
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