General
Enclosure dimensions	30 x 63 mm

The Y7N current transformer from Chauvin Arnoux is an isolated AC current transformer specifically designed for use with oscilloscopes. It enables the measurement of small and medium alternating currents on larger cables or busbars, with the jaw supporting an encirclement diameter of up to 30 mm for cables and 63 mm for busbars (62×5 mm). The probe is suitable for installations up to category CAT III 600 V or CAT IV 300 V, making it safe for use in industrial and electrical installations. The current transformer delivers an output signal in the form of alternating voltage and features a turns ratio of 1 mV per ampere of alternating current (1 mV/A AC), allowing the current strength to be measured directly proportional to the output voltage. Typical accuracy is ≤ 2 %, ensuring reliable measurement in technical applications.

Applications

The Y7N is designed for measuring alternating currents in the range of 1 A to 600 A (peak up to 1200 A). It is particularly suitable for applications where current measurement on inaccessible or large conductors is required, such as in the maintenance of electrical installations, diagnosing power consumers, or analyzing network fluctuations. Use with an oscilloscope enables the display of current waveforms with a bandwidth of up to 10 kHz, which is important for evaluating transient events or harmonic distortions.

Features and Equipment in Detail

The current transformer features a robust jaw construction, allowing the probe to be clamped around the cable or busbar to be measured without interrupting the circuit. The output interface is via a coaxial cable with an insulated BNC connector, which can be connected directly to an oscilloscope. The insulation of the BNC connector protects against electrical hazards and prevents short circuits. The probe is designed for use in high-voltage environments, with categories CAT III 600 V and CAT IV 300 V defining the maximum permissible voltages for measurement.

Technology Explained Simply

The Y7N operates on the principle of an inductive current transformer. When alternating current flows through the cable, it generates a magnetic field that is detected by the jaw. This field induces a voltage in the secondary winding of the probe, proportional to the current. The output voltage is transmitted via the coaxial cable to the oscilloscope, where it is displayed as a voltage curve. The turns ratio of 1 mV/A means that a current of 1 A generates an output voltage of 1 mV. The bandwidth of 10 kHz allows for the representation of rapid current changes, which is important for analyzing electrical signals in modern installations.

Compatibility and Accessories

The Y7N is specifically designed for use with oscilloscopes. Connection is made via the insulated BNC connector, which is plugged into the input socket of an oscilloscope.

Mounting and Installation

Installation is performed by simply clamping the jaw around the cable or busbar to be measured. No additional mounting or installation is required. The probe can be connected directly to the oscilloscope, with the insulation of the BNC connector ensuring no electrical hazards occur. Measurement is performed without interrupting the circuit, enabling use in live installations.

Operational Advantages

The Y7N provides safe and reliable measurement of alternating currents in electrical installations. The insulation and categories CAT III 600 V and CAT IV 300 V protect the user from electrical hazards. The high bandwidth of 10 kHz enables analysis of fast current waveforms, and the turns ratio of 1 mV/A ensures direct and precise representation of the current waveform on the oscilloscope. The robust construction and easy handling make the probe a practical tool for electricians and technicians.