GROUND DETECTORS

GROUND DETECTORS

GROUND DETECTORS DC Ground detectors are the devices that are used to detect/indicate the ground fault for ungrounded DC systems. When …

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TRANSFORMER EXTERNAL FAULTS

TRANSFORMER EXTERNAL FAULTS External faults are those faults or hazards that occur outside the transformer. These hazards present stresses on …

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SWITCHGEAR

SWITCHGEAR The apparatus used for switching, controlling, and protecting the electrical circuits and equipment is known as switchgear. The switchgear …

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BOOSTER TRANSFORMER

BOOSTER TRANSFORMER Sometimes it is desired to control the voltage of a transmission line at a point far away from …

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AUTO TRANSFORMER TAP CHANGING

AUTO TRANSFORMER TAP CHANGING The figure shows diagrammatically auto-transformer tap changing. Here, a mid-tapped auto-transformer or reactor is used. One …

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TAP CHANGING TRANSFORMERS

TAP CHANGING TRANSFORMERS The excitation control method is satisfactory only for relatively short lines. However, it is not suitable for …

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SUBSYNCHRONOUS RESONANCE

SUBSYNCHRONOUS RESONANCE Subsynchronous resonance is a condition that can exist in a power system where the network has natural frequencies …

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