Current Transformer Errors
In CT there are two types of errors
- Ratio Error
- Phase angle Error
Ratio Error
As we know the current ratio and the turns ratio in CT should be equal but due to magnetization and loss of components of primary side and power factor in the secondary which cause the difference between current ratio and the turns ratio.Due to this the actual current ratio will vary and it will depend upon load current and power factor of the load and due to this actual current ratio cannot be calculated. Ratio error can be expressed in terms of percentage.
Phase angle Error
As we Know Phase Angle of Current Transformer() is the angle between the primary current and the secondary current.The deviation in lead to Phase angle Error.
The load of the CT is generally resistive so the power factor is unity () so now the equation for phase angle Error can be Written as
Degree
Degree
Current Transformers
In this article, we will discuss what is A current Transformer?, Construction of the Current Transformer, Its Working, Phasor Diagram, Errors in the current Transformer, and Its Types, and At last we will conclude this article With its advantages, disadvantages, Application, and FAQs.
Table of Content
- What is a Current Transformer?
- Construction of the Current Transformer
- Working of Current Transformer
- Phasor Diagram of Current Transformer
- Current Transformer Errors
- Reduction of Errors in Current Transformer
- Types of Current Transformers