General
Rated current	200 A AC
Maximum cable diameter	20 mm

The MN14 clamp from Chauvin Arnoux is a current transformer for measuring alternating currents in electrical installations. It serves as accessory equipment for multimeters or power analysers and enables non-invasive current measurement without interrupting the circuit. The device is designed for use in installations up to category CAT III 600 V or CAT IV 300 V, making it suitable for measurements in industrial and commercial electrical systems.

Applications
The MN14 clamp is particularly suitable for measurements at hard-to-reach locations, where conventional current measurement by disconnecting the circuit would be impossible or too cumbersome. It is frequently used in electrical installations, during maintenance work on machines, or in power distribution to monitor the current consumption of individual circuits or devices. The maximum cable diameter of 20 mm allows measurement on medium-sized conductors, which are common in many installations.

Functions and Equipment in Detail
The current transformer operates on the principle of inductive current measurement. It detects the magnetic flux generated by an alternating current in a conductor and converts it into a proportional output signal. The output signal is an alternating voltage, which is tapped via sockets with a diameter of 4 mm. These sockets are insulated, enabling a safe connection to measuring instruments. The rated current is 200 A AC, with the clamp designed for measurements up to 240 A, providing a certain safety and overload margin.

Technology Explained Simply
The ratio between output signal and input current is 1 mV per ampere of alternating current (1 mV/A AC). This means that for a measured current of 100 A, an output signal of 100 mV is present at the sockets. This signal can be directly captured by a multimeter or power analyser and converted into current values. The clamp is compact and ergonomically designed to ensure comfortable handling, even during prolonged measurements. The insulation of the sockets protects against contact with conductive parts and increases safety during use.

Compatibility and Accessories
The MN14 clamp is designed for use with multimeters and power analysers that can receive an input voltage within the range of the generated alternating voltage (typically in the millivolt range). Exact compatibility depends on the input characteristics of the respective measuring instrument, particularly the input impedance and measurement range.

Mounting and Installation
Installation is performed by simply clamping the clamp around the conductor to be measured. No disconnection of the conductor is required. The clamp is positioned so that the conductor is fully within the measurement area, and the sockets are connected to the corresponding inputs of the measuring instrument. Measurement is carried out without additional tools or aids.

Advantages in Operation
The MN14 clamp offers a fast and safe method for current measurement without interrupting the circuit. Its compact design and ergonomic shape facilitate handling, especially in confined or hard-to-reach areas. The insulation of the sockets increases safety, and the clear signal transmission enables precise measurement values. Its use in installations up to CAT III 600 V or CAT IV 300 V makes it suitable for many industrial and commercial applications.