# Difference Between Current Transformer (CT) And Potential Transformer (PT)

Hello guys, welcome back to my blog. In this article, I will discuss the difference between the current transformer and the potential transformer.

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## Difference Between Current Transformer (CT) And Potential Transformer (PT)

01. The current transformer is used to measure the current so it is called a current transformer whereas the potential transformer is used to measure voltage so it is called a potential transformer.

02. In the current transformer, the primary winding is connected in series of the load whereas, in the potential transformer, the primary winding is connected in parallel of the voltage to be measured.

03. In the case of the current transformer, the current is step down whereas in the potential transformer, the voltage is step down.

04. In the current transformer, the primary winding turn is less than the secondary winding whereas, in the potential transformer, the primary winding turn is more than the secondary winding.

05. The bar-type current transformer will not have a primary winding. In the case of a potential transformer, the primary winding is a must.

06. The voltage across the primary winding will be low in the case of the current transformer whereas, in the case of the potential transformer, the full input voltage will come across the primary winding.

07. In the case of the current transformer, the output can not be kept open. However, the output of a winding may be kept open in the rare case. Whereas in the potential transformer, the output can be kept open.

08. In the case of the current transformer, high resistance load is not safe but low resistance load is safe whereas in the potential transformer, high resistance load is safe but low resistance load is not safe.

09. In the case of the current transformer, the impedance of the transformer is not so important whereas, in the case of a potential transformer, an impedance of the transformer is more important.

10. In the case of the current transformer, it has only one output whereas in the potential transformer many outputs may be provided.

11. The current transformer is designed for the wide variation of current at input whereas the potential transformer is designed for limited variation in the input voltage.

Well, guys, these are some main differences between the current transformer and potential transformer. Thank you for reading the article.
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