General
Model	C122
Enclosure diameter	52 mm

The clamp current transformer model C122 from Chauvin Arnoux is a precise measuring device for capturing alternating currents in the range of 1 A to 1200 A. It is specifically designed for applications in industrial and commercial environments where high measurement accuracy and safety in current measurement are required. The device features a round clamp shape with an encircling diameter of 52 mm, allowing it to encircle conductors with a diameter up to 52 mm without requiring interruption of the power supply. The uniform coil winding ensures minimal phase shift and maximum accuracy during measurement. The device is designed for safety category CAT III 600 V, making it suitable for measurements in electrical installations with a rated voltage up to 600 V.

Clamp current transformer is the product type described here. It serves as a sensor to convert alternating current into a proportional output signal that can be processed by a measuring device, such as an ammeter or multimeter. The turns ratio is 1000/5, meaning that an input current of 1000 A generates an output signal of 5 A. This design enables precise measurement even at low currents, as the output signal is in the 5 A range, which is easy to process for many measuring devices. The accuracy of the device is ≤ 1 %, ensuring high reliability of the measured values.

Applications include particularly the monitoring and analysis of power consumption in industrial facilities, in energy distribution, as well as in the maintenance and servicing of electrical systems. The device is especially suitable for measurements on hard-to-reach conductors, as the pendulum hinge system and the patented support system ensure a progressive opening of the clamp jaws. This facilitates handling and reduces physical effort during operation. The clamp jaws open evenly and can be securely closed around the conductor even in tight spaces.

Functions and equipment in detail include the output of an alternating current signal via insulated sockets with a diameter of 4 mm. These sockets are equipped with overvoltage protection to protect the device and the connected measuring device from transient voltage spikes. Overvoltage protection is an important safety feature, especially in environments with high electrical loads or sudden voltage fluctuations. The insulated sockets enable a safe and reliable connection to external measuring devices.

Technology explained simply means that the clamp current transformer operates on the principle of electromagnetic induction. When a conductor carrying alternating current is passed through the clamp, the current generates a magnetic field that induces a voltage in the coil of the clamp current transformer. This induced voltage is proportional to the current in the conductor and is output as a signal via the sockets. The construction with round clamp jaws and uniform winding minimizes distortions and ensures stable and precise measurement.

Compatibility and accessories refers to use with measuring devices capable of receiving an alternating current signal in the 5 A range. The device does not come with crocodile clips or other accessories mentioned in other product descriptions.

Mounting and installation are performed by simply clamping the conductor to be measured with the clamp. No additional mounting or installation is required. The clamp is closed around the conductor, with the opening facilitated by the pendulum hinge system and support system. The connection to the measuring device is made via the insulated sockets, which are directly connected to the measuring device. No additional power supply or battery is required, as the clamp current transformer operates passively and draws its energy from the current being measured.

Operational advantages include high accuracy, easy handling, and safety. The minimal phase shift and high accuracy ensure reliable measurement results. The progressive opening of the clamp jaws facilitates work, especially during frequent measurements or in confined spaces. The overvoltage protection safeguards the device and the connected measuring device from damage due to electrical overvoltages. The device is designed for use in CAT III 600 V environments, meeting high safety standards.

The delivery scope includes exclusively the clamp current transformer model C122 with insulated sockets and overvoltage protection.