In the following, we clarify What is a current transformer used for?, When do we use current transformers?, Why are transformers used?
What is a current transformer used for?
A current transformer is used to measure and monitor electrical currents in a circuit. It converts high currents to a lower, manageable level that can be safely measured by instruments or monitored by control systems. This allows precise monitoring and protection of electrical systems without exposing sensitive equipment to high current levels.
When do we use current transformers?
The purpose of using a current transformer is to provide accurate current measurements for monitoring, control and protection purposes. By lowering high current levels to a lower value, it allows the safe operation of measuring instruments and relays that would otherwise be damaged by direct exposure to high currents. This ensures the reliability and safety of electrical systems.
A current transformer is connected in series with the conductor whose current is to be measured. It has a primary winding, which is essentially the current-carrying conductor, and a secondary winding, which provides a reduced current output proportional to the primary current. This configuration allows for precise current measurement and monitoring.
Why are transformers used?
A current transformer measures current by electromagnetic induction. The primary conductor passes through the core of the current transformer, creating a magnetic field proportional to the current. This magnetic field induces a current in the secondary winding, which is proportional to the primary current and can be measured using standard instruments.
If a current transformer fails, it can result in inaccurate current measurements, which can lead to malfunction of protection systems and electrical equipment. This can lead to problems such as incorrect load readings, failure to trip protective devices in the event of a fault, and potential damage to the transformer and associated electrical systems. Regular maintenance and monitoring are essential to avoid such breakdowns.
We trust this guide to What is a current transformer used for? has been beneficial.
