Instrument Transformer and its application

Instrument Transformer: An instrument transformer is an electrical transformer that is used to measure electrical quantities such as voltage, current, and power. It is designed to isolate the measuring instruments and other protective devices from high voltage power circuits.

Application of Instrument Transformer: Instrument transformers are used in various electrical applications such as power generation, transmission, and distribution systems. They are used to extend the range of measuring instruments and to protect them from high voltage and high current circuits.

Extension of Range: The instrument transformer is used to extend the range of induction instruments. Induction instruments are used to measure AC voltage and current. However, their range is limited to a few volts or amperes. The instrument transformer is used to step down the high voltage or high current circuits to a level that can be measured by induction instruments.

Types of Instrument Transformers: There are two types of instrument transformers: Current Transformer (CT) and Potential Transformer (PT). CT is used to measure high currents, and PT is used to measure high voltages.

Working of Instrument Transformer: The working principle of an instrument transformer is similar to a regular transformer. It consists of a primary winding and a secondary winding. The primary winding is connected to the high voltage or high current circuit, and the secondary winding is connected to the measuring instruments. The ratio of the number of turns in the primary and secondary winding determines the voltage or current transformation ratio.

Advantages of Instrument Transformer: The advantages of instrument transformers are:

- They provide electrical isolation between the measuring instruments and the power circuits.
- They extend the range of measuring instruments.
- They protect the measuring instruments from high voltage and high current circuits.
- They are cost-effective compared to using high range measuring instruments.

Therefore, the correct answer is option 'A' - An instrument transformer is used to extend the range of induction instruments.

An instrumentation transformer means CT and PT both have winding(coils) whenever current flows in that windings flux will be produced that will energised beside of the windings nothing but induction simply the transformer principle so the answer is induction type insyrument