ACREL Mini Round Current Transformer for Electrical Power Monitoring

The ACREL Mini Round Current Transformer for Electrical Power Monitoring is a compact current transformer (CT) designed to sense and measure alternating current in electrical circuits. A current transformer works on the principle of electromagnetic induction, converting a higher primary current flowing through a conductor into a smaller secondary signal that can be safely measured by an electrical meter or monitoring device.

The mini round-type design is intended for applications where a compact current sensing component is required. The conductor carrying the primary current passes through the CT's central aperture, allowing the transformer to sense the current without requiring the high-current circuit to be directly connected to the measuring instrument.

This miniature round CT range includes models designed to provide a small-current output signal, such as the AKH-0.66W-9A/9B series, which has a 50A/50mA current ratio and is designed for use with multi-loop electrical meters such as the AMC16. Acrel documentation highlights the series' small size, high accuracy, strong load capacity, and easy installation.

How Does It Work?

• The primary conductor carrying AC current passes through the CT's round central opening.
• The magnetic field generated by the primary current induces a proportional current in the CT's secondary winding.
• The transformer reduces the measured current to a smaller signal suitable for connection to compatible monitoring or measuring equipment.
• The connected meter or monitoring device processes the secondary signal to determine the primary circuit current.
• The measured current can then be used for electrical monitoring, power measurement, energy management, or system control.

This indirect measurement method provides galvanic isolation between the high-current conductor and the connected measuring electronics, supporting safer and more practical current monitoring.

Why Choose This Product?

• Compact design – The miniature round construction is useful where installation space is limited.
• Convenient current measurement – The primary conductor passes through the CT aperture, simplifying installation.
• Suitable for multi-loop monitoring – Compact CTs can be paired with multi-channel or multi-loop monitoring equipment.
• Reliable current sensing – Provides a proportional output signal for compatible measurement equipment.
• Electrical isolation – Helps isolate measuring instruments from the higher-current primary circuit.
• Easy system integration – Can be used with compatible energy meters and power monitoring equipment.
• Space-saving solution – Particularly useful for compact distribution boards and control panels.
• Suitable for continuous monitoring – Supports ongoing observation of electrical current in monitored circuits.
• Practical for retrofit projects – The compact form factor can be advantageous when adding current monitoring to existing electrical installations.

Benefits

• Enables safe indirect AC current measurement
• Helps protect connected measuring equipment through electrical isolation
• Saves valuable installation space
• Simplifies integration into electrical monitoring systems
• Supports multi-circuit and multi-loop current monitoring
• Provides a proportional current signal for compatible meters
• Helps improve visibility of electrical system operating conditions
• Supports power and energy monitoring applications
• Suitable for industrial and electrical distribution equipment
• Can help reduce the complexity of current measurement installations
• Supports intelligent electrical monitoring and energy management systems
• Provides a practical solution for compact electrical panels