SWITCHGEAR
The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. The switchgear equipment…
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INDUCTION REGULATORS
An induction regulator is essentially a constant voltage transformer, one winding of which can be moved w.r.t. the other, thereby…
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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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TAP CHANGING TRANSFORMERS
The excitation control method is satisfactory only for relatively short lines. However, it is not suitable for long lines as…
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EXCITATION CONTROL
When the load on the supply system changes, the terminal voltage of the alternator also varies due to the changed…
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BROWN BOVERI REGULATOR
In this type of regulator, exciter field rheostat is varied continuously or in small steps instead of being first completely…
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TIRRIL REGULATOR
In this type of regulator, a fixed resistance is cut in and cut out of the exciter field circuit of…
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VOLTAGE CONTROL
WHAT IS VOLTAGE CONTROL? In a modern power system, electrical energy from the generating station is delivered to the ultimate…
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GROUND DETECTORS
DC Ground detectors: are the devices that are used to detect/indicate the ground fault for ungrounded DC systems. When a…