LOSS AND EFFICIENCY AND COSTING OF TRANSFORMER
Transformers reduce the voltage of the electricity supplied by the utility to a level suitable for use by the electric…
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LIFE CYCLE COST OF TRANSFORMERS
To perform the economical analysis of transformer, it is necessary to calculate its life cycle cost, sometimes called total cost…
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Auto Transformer - Electrical Machines - Instrument Transformer - Transformer - Types of Transformer
TYPES OF TRANSFORMERS
TRANSFORMER A transformer is an extended version of an inductor. The flux that is created inside the inductor is used…
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EMF EQUATION OF A TRANSFORMER
The magnetic flux ϕ set up in the core of a transformer when an alternating voltage is applied to its…
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AIR CORE TRANSFORMER
Some small transformers for low-power applications are constructed with air between the two coils. Such transformers are inefficient because the…
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BOOSTER TRANSFORMER
Sometimes it is desired to control the voltage of a transmission line at a point far away from the main…
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AUTO TRANSFORMER TAP CHANGING
Figure shows diagrammatically auto-transformer tap changing. Here, a mid-tapped auto-transformer or reactor is used. One of the lines is connected…
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TRANSFORMER EXTERNAL FAULTS
External faults are those faults or hazards that occur outside the transformer. These hazards present stresses on the transformer that…
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PROPERTIES OF TRANSFORMER OIL
Even though the basic functions of the oil used in transformers are (a) heat conduction and (b) electrical insulation, there…
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THERMAL AND VOLTAGE CONSIDERATIONS OF PRACTICAL TRANSFORMER
THERMAL CONSIDERATIONS The losses in the windings and the core cause temperature rises in the materials. This is another important…