General
Enclosure dimensions	64 x 150 mm
Measurement range	1 A…1200 A | 1 A…2400 A | 1 A…3600 A

The Chauvin Arnoux D35N clamp is a clamp current transformer for precise measurement of alternating currents in industrial and technical installations. The device is specifically designed for use with thick cables and busbars, where the rectangular shape of the clamp jaws enables secure encirclement of large conductor cross-sections. The "D" model series is characterised by high measurement accuracy and a robust construction suitable for demanding environments.

Applications
The clamp current transformer D35N is used in electrical engineering and mechanical engineering, where precise measurement of medium to high alternating currents is required. Typical applications include monitoring power consumption in production plants, diagnosing current flows in distribution systems, or commissioning electrical installations. The encirclement dimensions of 64 x 150 mm allow measurement on cables and busbars with corresponding cross-sections.

Functions and equipment in detail
The device features three measurement ranges with a measurement range of 1 A to 1200 A, 1 A to 2400 A, and 1 A to 3600 A. The respective turns ratios are 1000/5, 2000/5, and 3000/5, with typical accuracies of ≤ 1 %, 0.5 %, and 0.5 %. The output signals are available as alternating current and are delivered via insulated sockets with a diameter of 4 mm. These output sockets are designed for safe and reliable connection to measuring instruments or control systems.

Technology explained simply
The clamp operates on the principle of a current transformer: the current to be measured flows through the clamp jaws, generating a magnetic field that induces a proportional current in the secondary winding. The distributed windings and the quality of the magnetic circuits ensure high measurement accuracy, especially at high currents. The overvoltage protection at the output protects connected measuring instruments from transient voltage spikes that may occur during sudden load changes or short circuits.

Compatibility and accessories
To adapt to various measuring instruments or plug connections, adapters can be used. Suitable accessories include a set of two adapters with BNC socket and 4 mm plug, enabling connection to devices with BNC connectors. The clamp is designed for an operating voltage of 600 V CAT III, making it suitable for use in industrial networks.

Mounting and installation
The clamp is simply placed around the conductor to be measured, with the rectangular shape ensuring secure encirclement even for irregular cross-sections. No additional mounting elements or tools are required. Installation is performed without interrupting the current flow, allowing plant operation to continue during measurement.

Advantages in operation
The D35N offers high measurement accuracy combined with great flexibility due to the three measurement ranges. The insulated output sockets and overvoltage protection increase safety during use. The robust construction and suitability for 600 V CAT III make the device a reliable tool in industrial electrical engineering. The rectangular shape of the clamp enables easy handling on large cables and busbars, allowing measurements to be performed quickly and safely.