Instrument Transformers

Instrument Transformers

Instrument Transformers Instrument transformers are used for metering and protection in a power system. Electrical measurements and relaying decisions in a power system are made based on the current and voltage obtained from the system. Relays work with smaller magnitudes of these signals. Real life currents and voltages thus have to be scaled to lower […]

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Instrument Transformers

Instrument transformers are essential parts of many electrical metering and relaying systems. The quality of instrument transformers will affect directly the overall accuracy and performance of these systems. Instrument transformer performance is critical in protective relaying since the relays can only be as good as the instrument transformers. They serve two basic functions:  To change

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Instrument Transformer

For the measurement of large currents and high voltages in AC circuits, specially constructed accurate ratio transformers are used in conjunction with low range AC instruments. These specially constructed transformers are known as instrument transformers. Types of Instrument Transformer There are two types of instrument transformer. These are: Potential Transformers (PTs) Current Transformers (CTs) These instrument

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