General
Number of measurement loops	3
Enclosure diameter	25 cm
Operating time (battery)	500 Stunden

The Chauvin Arnoux A130 AmpFlex is a flexible three-phase current sensor used for non-invasive measurement of alternating currents in industrial, energy, and testing applications. The device features three independent measurement loops, enabling simultaneous current measurement in a three-phase system or up to three separate conductors. Due to their flexibility and low mass, the sensors can be easily clamped around cables, bars, or wires regardless of their shape or cross-section. Measurement is performed using the Rogowski coil principle, which does not require a magnetic core, thus avoiding saturation effects and heating. The output is provided via three coaxial cables with insulated BNC connectors, which can be directly connected to power analysers, recorders, or other measuring instruments with corresponding inputs.

Applications

The A130 AmpFlex is used in various industries, including industrial maintenance and repair, energy generation and distribution, public transport, and research and testing laboratories. It is particularly suitable for harmonic analysis and measurements in complex electrical installations where flexible and safe mounting is required. The IP67 protection rating of the sensors makes them suitable for outdoor use, while the housing with IP54 protection is safeguarded against dust and limited water ingress.

Features and Equipment in Detail

The device offers a measurement range from 0.5 A to 3 kA, with the three calibers enabling measurements across various current levels. The sensors have a length of 80 cm, with a clamping diameter of 25 cm. The output signals are alternating voltages delivered via the BNC connectors. Power supply is either via two 1.5 V AA batteries or an external power supply with a µUSB Type-B connector. The operating time on battery power is 500 hours. The devices feature an auto-shutdown function, which can be disabled for extended measurement campaigns. Three LEDs on the housing indicate the operating status: green LED for power supply, yellow LED for the auto-shutdown status, and red LED when the measurement range is exceeded.

Technology Explained Simply

The Rogowski coil used in the A130 AmpFlex operates without a magnetic core. This makes the device flexible, lightweight, and resistant to saturation. Measurement is performed inductively, with the voltage output proportional to the rate of change of current. The low phase shift and high linearity ensure precise power measurements. The bandwidth is suitable for industrial frequencies and harmonic analysis. The output via coaxial cables with BNC connectors ensures reliable signal transmission.

Compatibility and Accessories

The A130 AmpFlex is compatible with power analysers, recorders, and other measuring instruments that support AC voltage inputs (mV AC / V AC) with BNC or banana connectors. Suitable accessories include opening clamps for AmpFLEX (black, 10 pcs), coloured identification parts, a set of two adapters BNC female/4mm male, Velcro straps (5 pcs), and a USB power adapter. These components facilitate mounting, identification, and power supply.

Mounting and Installation

Installation is performed by clamping the sensors around the conductors to be measured. The loops can be easily opened and closed even when wearing safety gloves. The BNC connectors are directly connected to the measuring instrument. The devices are suitable for use in switch cabinets and distribution enclosures due to their lightweight and compact design. The IP67 protection rating of the sensors allows use in humid or dusty environments.

Operational Advantages

The A130 AmpFlex offers high flexibility in mounting, long operating time, and reliable measurement without saturation effects. The low phase shift and high linearity ensure accurate power measurements. The ability to disable the auto-shutdown function is beneficial for long-term measurement campaigns. Power supply via batteries or external power source provides application flexibility. The integrated LEDs simplify operation and status monitoring.

Batteries are not included in the delivery scope.