General
Enclosure diameter	20 mm

The MN10 current clamp transformer from Chauvin Arnoux is a compact 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 precise current measurements are required at tight or hard-to-reach locations. The device enables measurement of alternating currents in installations up to safety category CAT III 600 V and CAT IV 300 V, making it suitable for use in electrical installations in operational environments. The compact design and ergonomic shape facilitate handling, especially in confined spaces.

Applications

The MN10 is suitable for alternating current measurements in industrial and commercial installations where precise current detection is required without direct contact with the conductor. It is frequently used in the maintenance, servicing, and diagnosis of electrical systems, particularly for checking loads, phases, or power consumption in electrical installations. The small jaw width of 20 mm allows measurement on thick cables or in tight cable runs where larger measuring clamps cannot fit.

Functions and Equipment in Detail

The current clamp transformer operates on the principle of a current transformer and transforms the primary alternating current in a ratio of 1000:1. The output signal is also alternating current and is delivered via 4 mm insulated sockets. These sockets are equipped with an integrated overvoltage protection to protect the connected measuring device from transient voltage spikes. The typical accuracy is ≤ 2 %, which is sufficient for reliable measurement in technical applications. The output sockets are robustly constructed to ensure a secure and durable connection to measuring devices such as multimeters or power analysers.

Technology Explained Simply

A current clamp transformer like the MN10 operates without physical contact with the conductor. It encloses the current-carrying conductor and induces a proportional output signal via a transformer. The transformation ratio of 1000:1 means that a current of 240 A in the primary circuit generates an output signal of 0.24 A in the secondary circuit. This signal can then be captured by a suitable measuring device that has a current measurement range for small currents. The safety categories CAT III 600 V and CAT IV 300 V refer to the maximum permissible voltage in the installation where the device may be used, ensuring safe operation under industrial conditions.

Compatibility and Accessories

The MN10 is designed for use with multimeters or power analysers that have a current measurement range in the milliampere or ampere range. The 4 mm sockets comply with the standard for measuring device connections and allow direct connection.

Mounting and Installation

Installation is carried out by simply opening the clamp, enclosing the conductor to be measured, and closing the clamp. No additional tools or mounting procedures are required. The clamp is placed directly on the conductor, with the jaw width of 20 mm limiting the maximum cable thickness. Measurement is performed without interrupting the current flow, which does not affect the operation of the installation.

Operational Advantages

The MN10 offers high safety due to the integrated overvoltage protection at the output and compliance with the IEC 61010 standard. The compact design and ergonomic handle facilitate handling, especially in confined spaces. The accuracy of ≤ 2 % and the transformation ratio of 1000:1 enable precise current measurement, which is sufficient for the diagnosis and maintenance of electrical systems. Use in installations up to CAT III 600 V and CAT IV 300 V makes the device suitable for industrial and commercial applications.

Scope of Delivery

The scope of delivery includes the MN10 current clamp transformer and the operating instructions. The operating instructions contain the necessary information for correct handling and safety instructions.