Basic Difference Between Current Transformer And Voltage Transformer

Basic Difference Between Current Transformer And Voltage Transformer. Current and voltage transformers (cts, vts) as an integral part of protection chain. One of the major difference between them is that the current transformer converts the high value of current into low value whereas the potential or voltage transformer converts the high value of voltages into low voltage.

Basic Transformer Differential Protection Calculation
Basic Transformer Differential Protection Calculation from musicaccoustic.com

Of turns become inversely proportional to current whereas in p.t no. The basic principle of the current transformer is the same as that of the power transformer. Current transformers are used for both metering and protection purposes.

The Current Transformers Usually Have More Copper And Bigger Than Voltage Transformers.


For example, if 150 amps flow through the 300 amp rated primary, the secondary current would be 2.5 amps. Cts that transform current isolate the high voltage The cts (current transformers) and vts (voltage transformers) are provided in the plants to reduce the voltage and current values of the plant to values such as to be able to be detected by measurement and protection devices.

This Is Important Since Countries Like America Utilize Different Voltages In Homes For Various Purposes (Like The 120 Volts Used By Appliances).


The basic principle of the current transformer is the same as that of the power transformer. There is no difference between a voltage and a current transformer. Current transformers are used for both metering and protection purposes.

The Current Is Transformed Because The Impedance Is Because The Voltage Is.


• potential transformers lower the voltage with an increase of current in the secondary, while current transformers lower the current with an increase in the voltage. The transformer is basically a voltage control device. The ratio of a current transformer is equivalent to the voltage ratio of potential transformers.

C.t Is Connected In Series With Ht Line Whereas P.t Is Connected In Parallel In Ht Line.


If turns become directly proportional to the voltage. They are constructed to supply a current in its secondary winding related to the current flowing in its. Potential transformers will measure and reduce high voltage values into lower.

If The Primary Current Changes, The Secondary Current Output Will Change Accordingly.


Potential transformers, or pts, also measure an aspect of power supply. Whereas, voltage transformer is used for measurement, as the power source and to operate a protective relay, etc. A transformer can be defined as a static device which helps in the transformation of electric power in one circuit to electric power of the same frequency in another circuit.

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