How to choose a current transformer

FAQ | Mar 02,2023

Choosing a current transformer involves several factors that need to be considered. Here are some important steps to follow:

  1. Determine the type of current to be measured: AC or DC. Most current transformers are designed for AC current, so if you need to measure DC current, you will need to select a specific DC current transformer.
  2. Determine the current rating: Determine the maximum current that needs to be measured. Current transformers are designed to measure a specific range of currents, and selecting the correct range is essential for accurate measurements.
  3. Determine the accuracy requirement: Different applications require different levels of accuracy. For example, power generation and transmission typically require higher accuracy than some industrial applications. Determine the level of accuracy required for your application and select a current transformer that meets that requirement.
  4. Determine the burden requirement: The burden is the maximum load that the current transformer can drive, and it is usually expressed in VA (volt-amperes). Choose a transformer with a burden that is sufficient for your application.
  5. Consider the type of output required: Determine the type of output required, whether it is a voltage or current output, and select a transformer with the appropriate output.
  6. Consider the physical size and mounting requirements: Choose a transformer that is suitable for the physical size and mounting requirements of your application.
  7. Verify compatibility: Make sure the current transformer is compatible with your measurement equipment and that it meets any relevant safety standards.

By following these steps, you can choose a current transformer that is appropriate for your application and meets your accuracy and measurement requirements.


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