General
Rated current	2400 A AC
Measurement range	1…3600 A AC
Enclosure dimensions	64 x 150 mm

The D30CN current transformer from Chauvin Arnoux is a measuring instrument for the precise detection of alternating currents in industrial and technical applications. It is particularly suitable for measuring medium and high alternating currents on thick cables and busbars, for which the rectangular shape of the jaw is optimised. The "D" model series is characterised by high measurement accuracy, achieved through the quality of the magnetic circuits and distributed windings. The device is designed for use in electrical installations with a voltage category of 600 V CAT III.

Applications

The D30CN current transformer is used in electrical engineering where non-invasive current measurement on existing conductors is required. Typical application fields include monitoring power consumption in production plants, diagnosing current flows in distribution systems, or testing electrical installations. The rectangular shape of the jaw allows it to encircle cables and busbars with cross-sections up to 64 mm × 150 mm, making it suitable for a wide range of applications in industry and the energy sector.

Functions and Equipment in Detail

The transformer measures alternating currents in the range of 1 A to 3600 A AC. The nominal current is 2400 A AC, with a turns ratio of 3000/1. Typical accuracy is ≤ 0.5 %, enabling reliable measurement even under high loads. The output signal is an alternating current delivered via a cable with an insulated connector (Ø 4 mm). This connector is designed for connection to measuring instruments such as ammeters, power meters, or data loggers. The output is equipped with overvoltage protection to safeguard the connected device from transient voltage spikes.

Technology Explained Simply

A current transformer operates on the principle of a transformer: the current to be measured flows through the jaw, generating a magnetic field that induces a proportional output signal in a secondary winding. The rectangular shape of the jaw allows it to encircle wide or flat conductors such as busbars, which would not be possible with round jaws. The distributed windings ensure even magnetic field distribution and minimise measurement errors. The low phase shift makes the device suitable for power measurements, where the phase relationship between voltage and current is relevant.

Compatibility and Accessories

The D30CN current transformer is compatible with measuring instruments that accept a 4-mm connector. As accessories, a set of two adapters (BNC socket/4 mm plug) is offered, enabling connection to devices with BNC connectors. These adapters expand application possibilities, especially for devices that do not work directly with the 4-mm connector.

Mounting and Installation

Installation is performed by simply encircling the conductor to be measured with the jaw. No additional mounting or fastening is required. The jaw can be placed directly onto the cable or busbar, taking into account the encircling dimensions of 64 mm × 150 mm. Connection to the measuring instrument is made via the supplied cable with the 4-mm connector.

Operational Advantages

The D30CN current transformer offers high measurement accuracy and reliability for detecting alternating currents. The rectangular shape of the jaw extends application possibilities to wide conductors, and the integrated overvoltage protection safeguards the connected device. The low phase shift also makes it suitable for power measurements. The combination of robust design and precise technology makes it a reliable tool in electrical engineering.

Protection Rating and Operating Conditions

The device is designed for use in electrical installations with a voltage category of 600 V CAT III, enabling use in industrial and commercial environments. The designation 600 V CAT III refers to the safety category for measuring instruments that may be used in electrical installations with a maximum operating voltage of 600 V.