General
Measurement ranges	0,5 A…30 A | 0,5 A…300 A | 0,5 A…3000 A
Enclosure diameter	10 cm
Loop length	35 cm
Degree of protection measurement loop	IP67
Battery operating time	300 Stunden

The flexible current transformer MiniFlex® MA110 from Chauvin Arnoux is a compact measuring device for non-invasive acquisition of alternating currents in industrial, energy technology, and testing applications. It is particularly suitable for use in hard-to-reach areas where conventional current measuring devices cannot be used due to their shape or size. The measuring loop is highly flexible and allows encircling various conductor cross-sections, including cable bundles, busbars, or other conductor forms. The loop has a length of 35 cm and an encircling diameter of 10 cm, enabling flexible adaptation to different conductor diameters. The technology is based on the Rogowski coil principle, which does not require a magnetic circuit, thus avoiding saturation effects and heating. The device delivers an alternating voltage signal at the output, which can be connected to measuring instruments such as multimeters, wattmeters, or recorders via a two-wire cable with two straight, insulated banana plugs Ø 4 mm.

Applications
The MiniFlex® MA110 is used in various industries, including industry, energy generation and distribution, the transport sector, as well as research and testing laboratories. It is particularly suitable for maintenance and repair services where quick and safe current measurement at tight or confined locations is required. The bandwidth of 10 Hz to 20 kHz also makes it suitable for harmonic analysis and measurement of transient currents. The low and constant phase shift ensures precise power measurements, making it especially valuable for applications in energy efficiency and network analysis.

Functions and Equipment in Detail
The device features four measuring ranges: 0.5 A to 30 A, 0.5 A to 300 A, 0.5 A to 3000 A. The transformation ratios are 1 V/A, 100 mV/A, 10 mV/A, and 1 mV/A, with a typical accuracy of ≤ 1 %. Measurement is performed using the Rogowski coil principle, which enables high linearity and low phase shift. Power supply is either via two AA batteries (1.5 V) or externally via a µUSB Type-B connector with 5 V. The battery operating time is 3�00 hours. The housing is equipped with protection class IP54, while the measuring loop itself has protection class IP67, making it suitable for outdoor use and in damp conditions. The safety category is 600 V CAT IV, ensuring high safety during measurements in electrical networks.

Technology Explained Simply
The Rogowski coil operates without a magnetic core, making the measuring loop flexible and lightweight. The output signal is an alternating voltage proportional to the measured current. The transformation ratios allow adaptation to different measuring ranges, with the signal transmitted to the measuring device via the cable with banana plugs. The low phase shift is crucial for accurate power measurements, as it ensures that voltage and current are correctly aligned in time. The bandwidth of 10 Hz to 20 kHz enables capture of frequencies typical for industrial drives, frequency converters, or other electronic loads.

Compatibility and Accessories
The MiniFlex® MA110 can be directly connected to multimeters, wattmeters, recorders, or other measuring devices with banana plugs. Suitable accessories include a set of two adapters (BNC plug/4 mm socket), Velcro straps (5 pieces), and a USB power adapter, which facilitate application expansion and handling. The use of adapters enables connection to devices with BNC connectors, increasing the device's flexibility.

Mounting and Installation
Mounting is performed by simply encircling the conductor to be measured with the flexible measuring loop. The loop can be easily opened and closed, even with safety gloves, making field work safer and more efficient. Connection to the measuring device is made via the included cable with banana plugs. Power supply can be via batteries or externally via USB, with batteries included in the delivery scope.

Operational Advantages
The MiniFlex® MA110 offers high flexibility due to its flexible measuring loop, which can adapt to different conductor shapes. The high bandwidth and low phase shift enable precise measurements, even with complex loads. The long battery operating time of 300 hours reduces maintenance effort. The IP67 protection class of the measuring loop makes it suitable for outdoor use, while the housing with IP54 is sufficiently protected for indoor use. The safety category 600 V CAT IV ensures a high protection standard during measurements in electrical networks.

Delivery Contents
The delivery contents include the flexible current transformer MiniFlex® MA110, a connection cable with two straight, insulated safety banana plugs Ø 4 mm, a user manual, and two AA batteries.