General
Enclosure diameter	20 mm

The MN12 current clamp from Chauvin Arnoux is a measuring instrument 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 measuring small to medium currents. The device features a compact design and ergonomic shape, enabling safe handling even in hard-to-reach locations. The clamping diameter is 20 mm, allowing cables in installations up to CAT III 600 V and CAT IV 300 V to be enclosed without requiring direct contact measurement.

Applications

The MN12 is suitable for applications in industrial and office installations where precise alternating current measurements are required. It is particularly used where cables or conductors are not directly accessible, such as in enclosures or complex wiring systems. The safety categories CAT III 600 V and CAT IV 300 V make it suitable for use in low-voltage electrical installations, with the IEC 61010 standard defining the safety requirements for measuring instruments.

Functions and Equipment in Detail

The current clamp provides an output signal in the form of an alternating voltage, which can be tapped via a 4 mm insulated socket. This socket ensures a safe and reliable data transmission. The turns ratio is 1 A / 10 mV AC, meaning that each ampere at the input generates an output signal of 10 millivolts. This ratio is optimized for use with multimeters or power analysers that can further process the signal. The typical accuracy is ≤ 1 %, which is sufficient for precise measurements in technical and industrial applications.

Technology Explained Simply

A current clamp like the MN12 uses the principle of electromagnetic induction. When current flows through a conductor, it generates a magnetic field. The clamp encloses the conductor and induces a voltage in its core, proportional to the flowing current. This voltage is transmitted to a measuring device via the 4 mm socket. The socket's insulation protects against electrical hazards and enables a safe connection. The CAT III 600 V and CAT IV 300 V ratings refer to safety categories according to IEC 61010, defining the maximum permissible voltage and environmental conditions under which the device can be safely operated.

Compatibility and Accessories

The MN12 is designed for use with multimeters and power analysers that have an alternating voltage input with 4 mm contacts. The exact selection of the measuring device depends on the requirements of the measurement task, particularly regarding the required accuracy and maximum input voltage.

Mounting and Installation

Installation is performed by simply clamping the conductor to be measured with the clamp. The clamp mechanism is opened by pressing a lever, allowing the clamping diameter of 20 mm to be utilized. It is important to ensure that the conductor is fully enclosed within the clamp to guarantee accurate measurement. The clamp is not permanently installed, but used temporarily for measurement purposes.

Operational Advantages

The MN12 offers high measurement accuracy of ≤ 1 %, ensuring precise results. Its compact design and ergonomic shape facilitate handling, especially in confined spaces. The 4 mm insulated socket ensures a safe connection to the measuring device. The safety categories CAT III 600 V and CAT IV 300 V allow use in a wide range of electrical installations, with the IEC 61010 standard forming the basis for safety requirements. The device is therefore suitable for professional users in the fields of electrical engineering and measurement technology.

Scope of Delivery

The scope of delivery includes the MN12 current clamp and the operating instructions.