Current transformer CT 250/5 A diameter 21 / 16x12.5 412107

Current transformer for precise measurements

This current transformer, designated CT 250/5 A, is a reliable tool for measuring current in electrical installations. It is designed to work with ammeters, energy meters and network analyzers, providing accurate and safe readings. The transformer's design allows it to be mounted on TH35 rails or directly on the base, making it easy to integrate with existing infrastructure.

Characteristics and application

The current transformer from the LM300 series by Legrand is an element used for safe and precise current measurement in electrical circuits. Its main task is to transform high primary currents (up to 250 A) into lower, safe secondary values (5 A), which can be measured by standard measuring instruments. This makes it possible to monitor the load of the installation, detect overloads and protect devices from damage. This transformer is used in both industrial, commercial and residential installations where precision and reliability of measurements are required.

Key features and benefits

• Accuracy class 0.5: ensures reliable measurement results, which is crucial for the proper operation of monitoring and protection systems.
• Transformation ratio 250/5 A: allows measuring large currents using standard measuring devices with a 5 A input.
• Rated secondary apparent power 5 VA: guarantees stable operation of the transformer under secondary load.
• Overcurrent factor FS 5: allows short-term loading of the transformer with currents much higher than the rated current without damaging the device – useful when starting motors or other devices with high starting current.
• Legalization: confirms compliance with applicable metrological standards and regulations – important in billing and control applications.
• Protection against touch: increases safety of use, minimizing the risk of electric shock.
• Core diameter 21 mm and possibility of mounting on conductors with dimensions 16x12.5 mm: ensures wide compatibility with various types of conductors and busbars.
• Secondary circuit connection using screw connection: facilitates installation and provides a secure electrical connection.
• Power consumption 5 W: indicates low energy consumption by the transformer during operation.

Thanks to these features, this transformer is a reliable solution for professionals involved in electrical installations and for end-users looking for precise tools to monitor energy consumption.