General
Enclosure diameter	20 mm

The MN09 current clamp from Chauvin Arnoux is a precise measuring device for capturing alternating currents in the range of 0.5 A to 240 A. It belongs to the MN series and is specifically designed for use in industrial and commercial installations where accurate current measurement is required at tight or hard-to-reach locations. The device features a compact design and an ergonomic design that enables safe and comfortable handling. The clamping diameter of 20 mm allows it to encircle cables in installations up to safety category CAT III 600 V and CAT IV 300 V, enabling use in electrical systems with high voltage levels.

Applications
The MN09 is ideal for applications in electrical engineering, particularly in industrial and office installations, where precise measurement of small to medium alternating currents is required. It is frequently used for maintenance work, energy consumption analysis, or diagnosing current consumers. The safety categories CAT III 600 V and CAT IV 300 V make it suitable for measurements in electrical systems operating under these standards.

Functions and Features in Detail
The current clamp operates on the principle of a current transformer and delivers an alternating current signal at the output. The turns ratio is 1000/1, meaning that an input current of 240 A produces an output signal of 0.24 A. The typical accuracy of ≤ 1 % ensures reliable and reproducible measurement results. The output is provided via a permanently attached cable with a 4-mm-insulated plug, enabling a secure and interference-free connection to multimeters or power analyzers.

Technology Explained Simply
A current clamp like the MN09 uses the principle of electromagnetic induction to measure current in a conductor without direct electrical contact. The clamp encircles the cable, and the flowing current generates a magnetic field that induces a proportional alternating current signal in the secondary winding of the transformer. The accuracy of ≤ 1 % is sufficient for professional applications to detect deviations in current consumption. The safety standard IEC 61010, particularly the categories CAT III 600 V and CAT IV 300 V, ensures that the device can be safely used even at high voltages.

Compatibility and Accessories
The MN09 is designed for use with multimeters and power analyzers that feature a 4-mm connection. The connection is made via the permanently mounted cable with an insulated plug, ensuring a mechanically stable and electrically secure connection.

Mounting and Installation
Installation is achieved by simply clamping the cable to be measured. The ergonomic shape and small clamping diameter of 20 mm allow measurements in tight spaces, such as in enclosures or cable trays. No additional mounting or installation is required—the device is positioned directly on the cable and measurement can begin immediately.

Operational Advantages
The MN09 offers high measurement accuracy in a compact form, making it particularly suitable for use in confined spaces. The fixed connection via the cable with a 4-mm plug prevents loose contacts and ensures reliable data transmission. The safety certification according to IEC 61010 for CAT III 600 V and CAT IV 300 V allows use in demanding electrical systems without requiring additional protective measures. The instruction manual, included in the delivery scope, supports the user in correct operation.

Delivery Contents
The delivery includes the MN09 current clamp and the instruction manual.