All day efficiency of transformer ppt

The steel should have high permeability and low hysteresis loss. For this to happen, the steel should be made of . The transformers are tested at full -load conditions. Transformer efficiency may be defined as the ratio between Output and Input.

All day efficiency of the transformer means the power consumed by it throughout the day or over hours.

The step down transformers used for electric power distribution purpose are referred as distribution transformer.

There are several types of transformer used in the distribution system.

Such as single phase transformer , three phase transformer , pole mounted transformer , pad mounted transformer , . The above equation is efficiency of any transformer. But for some special types of transformers such as distribution transformers power efficiency is not the true measure of the performance. For that purpose distribution transformer we calculate all day efficiency. Calculate transformer losses and efficiency using test 4. Distribution transformer serve residential and commercial loads. Transformers used on residence-lighting circuits (and distribution circuits generally) are either idle or only lightly loaded during much of hour period.

Condition for Maximum Regulation. Hence the concept of energy based efficiency is defined for such transformers. Under what condition does the transformer operate at maximum efficiency? What is regulation and its importance?

But, their secondaries supply little load all no-load most of the time during day (as residential use of electricity is observed mostly during evening till midnight). It transfers electrical energy from one electrical circuit to other with desired change in voltage and current, without changing the frequency(f=50Hz) and power. Constant flux device Magnetically coupled and electrically isolated Electro magnetic conversion device.

Transfers electric power from one circuit to another 2. It accomplishes this by electromagnetic induction 4. Hence the all - day - efficiency comes into picture while designing it. It depends on the typical load cycle for which it has to supply. Definitely Core design will be done to take care of peak load and as well as all - day - efficiency. But higher flux density increase iron losses resulting high temperature rise.

The value of flux density also depends upon service conditions of transformer. A distribution transformer design with low value of flux density to keep down the iron losses and increase in all day efficiency. Copper loss occurs only when they are loaded and hence is less important.