General
Enclosure diameter	10 mm

The MINI 01 current transformer from Chauvin Arnoux is a compact current transformer designed for AC current measurements, specifically conceived for use in commercial and industrial applications with low power. It enables precise measurement of AC currents in the range of 2 A to 150 A and is particularly suitable for applications where space is limited, such as in control panels, control boxes, or enclosures. The device features a clamping diameter of 10 mm, making it ideal for thin conductors or cables installed in confined spaces. The output signals are transmitted as AC current via a cable with insulated connectors (Ø 4 mm), and an integrated overvoltage protection safeguards the device against damage if disconnected from the measuring instrument during operation.

Applications

The MINI 01 is suitable for a wide range of applications in the field of electrical measurement technology, particularly where small to medium currents need to be accurately measured. It is frequently used in the maintenance, servicing, and diagnostics of electrical systems, for example, when checking controls, small motors, lighting systems, or consumers in electrical installations. Its compact size and minimal space requirement make it especially useful in tight installation areas where larger current clamps cannot fit.

Functions and Equipment in Detail

The current transformer operates on the principle of a current transformer, where the primary current (in the measurement range of 2 A to 150 A AC) induces a secondary current through a coil in the clamp body. The turns ratio is 1000/1, meaning that a current of 150 A in the primary circuit generates an output current of 150 mA in the secondary circuit. The typical accuracy is ≤ 2.5 %, which is sufficient for reliable measurement in practical applications. The output cable is fitted with two insulated, bent connectors (Ø 4 mm) that can be directly connected to multimeters or other measuring instruments with current measurement capability. The integrated overvoltage protection safeguards both the device and the connected measuring instrument against transient voltage surges that may occur during disconnection.

Technology Explained Simply

The MINI 01 is a passive current transformer that does not require its own power supply. It uses the magnetic field generated by the current in the conductor to induce a proportional current in the secondary circuit. Measurement is therefore contactless, without interrupting the current circuit. The frequency bandwidth ranges from 48 Hz to 500 Hz, enabling use with standard mains frequencies (50/60 Hz) as well as in higher-frequency applications. The maximum output voltage is 30 V with an open secondary circuit, ensuring safety during handling. The mechanical construction is robust, with a housing made of black, self-extinguishing plastic (UL94 V2), protected against mechanical stresses such as shocks (100 g / 6 ms) and vibrations (5–55 Hz).

Compatibility and Accessories

The MINI 01 is primarily designed for use with multimeters that have a current measurement function (in mA). The output connectors (Ø 4 mm) are compatible with standard multimeter test probes. The safety category CAT III 300 V and CAT IV 300 V (according to EN 61010-1) makes it suitable for measurements in electrical systems with up to 300 V voltage. The maximum operating temperature is +50 °C, and the storage temperature can reach up to +80 °C. The relative humidity during operation must not exceed 85 % RH, with a linear decrease permitted from 35 °C. The protection rating IP40 means the device is protected against solid foreign objects (minimum 1 mm) and splashing water, but is not suitable for outdoor use or in damp environments.

Installation and Mounting

Installation is contactless: the clamp is simply closed around the conductor to be measured, with the conductor positioned as centrally as possible within the clamp body to minimize measurement errors. The output cable is connected to the measuring instrument. The maximum conductor thickness is 10 mm, making the clamp suitable for thin cables and conductors. The operating temperature range of -10 °C to +50 °C allows use in a variety of environments, including industrial facilities and indoor spaces.

Operational Advantages

The MINI 01 offers a combination of compactness, reliability, and safety. The integrated overvoltage protection enhances safety during handling, especially when disconnecting from the measuring instrument. The high accuracy of ≤ 2.5 % and the wide frequency bandwidth (48 Hz to 500 Hz) enable precise measurements in various applications. The robust construction and IP40 protection rating ensure long service life and reliable operation in industrial environments. The compact design facilitates handling in tight installation areas and reduces the risk of incorrect operation.

Scope of Delivery

The scope of delivery includes the MINI 01 current transformer with cable and insulated connectors (Ø 4 mm) as well as integrated overvoltage protection.