General
Enclosure diameter	16 mm

The MINI 103 current transformer from Chauvin Arnoux is a compact measuring accessory for precise alternating current measurement in applications with low to medium power in commercial and industrial environments. It serves as an add-on device for multimeters and enables non-invasive measurement of alternating currents by enclosing the conductor to be measured. The device features a compact design and a maximum encirclement diameter of 16 mm, making it particularly suitable for measurements in tight installation situations. The MINI 103 delivers an alternating voltage signal at the output, which is connected to a measuring device via an insulated cable with a 4 mm plug.

Applications

The MINI 103 is designed for use in electrical engineering and industrial environments where precise current measurements are required for alternating currents between 0.1 A and 200 A. It is suitable, for example, for monitoring consumers, testing circuits, or diagnosing current consumption in machines and systems. Due to its small dimensions, it is particularly useful when conductors are routed in tight enclosures or cable trays.

Functions and Equipment in Detail

The current transformer operates on the principle of a transformer, where the current to be measured flows through the jaw and generates a proportional output signal. The turns ratio is 1 A / 1 mV, meaning that each ampere at the input generates 1 millivolt at the output. The typical accuracy is ≤ 1.5 %, which is sufficiently precise for professional applications. An overvoltage protection is integrated at the output to protect the device if voltage is present on the enclosed conductors during disconnection.

Technology Explained Simply

Measurement is contactless: the jaw is closed around the conductor to be measured, generating a magnetic field that induces a proportional alternating voltage signal in the secondary winding of the transformer. This signal is transmitted via the cable with the 4 mm plug to a multimeter, which converts it into current values. The cable insulation and plug ensure electrical safety. The overvoltage protection at the output prevents damage to the device if work is accidentally performed on live conductors.

Compatibility and Accessories

The MINI 103 is designed as an add-on device for multimeters that have a corresponding input for alternating voltage signals. Exact compatibility depends on the input characteristics of the specific multimeter. The device is not suitable for direct current measurements. It is supplied as a single unit without additional accessories such as adapters or cable extensions.

Installation and Mounting

Installation is performed by simply enclosing the conductor to be measured with the jaw. The jaw is opened to insert the conductor and then closed, establishing the magnetic coupling. The cable is connected to the multimeter, which must be switched to the AC voltage input setting. The measurement is then displayed directly on the multimeter screen.

Advantages in Operation

The MINI 103 offers fast and safe measurement without cutting conductors. Its compact design and small encirclement diameter enable measurements in confined spaces. The integrated overvoltage protection increases safety during operation. The high accuracy of ≤ 1.5 % ensures reliable measurement results. The device is designed for use in industrial and commercial environments and requires no additional tools for installation.

Scope of Delivery

The scope of delivery includes the MINI 103 current transformer and the operating instructions.