General
Enclosure diameter	39 mm

The PAC25 current clamp from Chauvin Arnoux is a measuring instrument from the PAC model series, designed for the precise measurement of small to medium direct and alternating currents in industrial and commercial applications. The device uses Hall-effect technology to accurately measure currents in the range of 0.5 A to 1000 A alternating current (AC) and 0.5 A to 1400 A direct current (DC). Measurement is contactless, achieved by closing the clamp around the conductor to be measured, thereby detecting the magnetic field strength of the current and converting it into an electrical output signal. This technology enables measurement of both direct and alternating currents, expanding its use in various electrical systems.

Applications

The PAC25 is suitable for measuring in installations with different cable and busbar cross-sections. It can measure a single conductor with an encircling diameter of 39 mm, or alternatively two smaller current busbars each 25 mm wide, or two busbars with dimensions 50×5 mm. This flexibility makes the device particularly useful in electrical engineering, where different conductor geometries occur, for example in enclosures, distributors, or during machine commissioning.

Functions and Equipment in Detail

The device provides an output signal in the form of direct and alternating voltage, with a turns ratio of 1 A/1 mV. This means that each ampere of current at the input generates one millivolt at the output, enabling linear and easily interpretable signal transmission. Typical accuracy is ≤ 4 %, which is sufficient for reliable measurement in technical applications. The output is via a cable with 4-mm-insulated connectors, enabling secure and easy connection to measuring instruments or control systems. The insulation of the connectors protects against short circuits and increases safety during handling.

Technology Explained Simply

Hall-effect technology is based on the physical principle that an electric current in a semiconductor material generates an electric field when placed in a magnetic field. In the PAC25, the magnetic field generated by the current to be measured is detected by a Hall element, which converts it into a proportional electrical signal. This signal is then transmitted via the cable with 4-mm connectors. The technology enables contactless measurement, allowing the device to be used in operating installations without requiring interruption of the power supply.

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Compatibility and Accessories

The PAC25 is designed for use with measuring instruments capable of receiving an input signal in the millivolt range. The 4-mm connectors are a standard in electrical engineering and fit many measuring instruments, multimeters, and data loggers.

Mounting and Installation

Installation is performed by simply clamping the conductor or current busbar to be measured with the clamp. No additional mounting or fastening is required. The clamp can be used while the system is operating, as it works contactlessly. Handling is simple, as the clamp can be mechanically opened and closed to insert the conductor.

Advantages in Operation

The PAC25 offers reliable and precise measurement of direct and alternating currents over a wide range. The versatility in encircling allows use in different installations. The output via 4-mm connectors ensures a secure and standardized connection. Hall-effect technology enables measurement without interrupting the circuit, increasing work safety and allowing measurement in running systems. The device is suitable for use in industrial and commercial applications where precise current measurement is required.

Scope of Delivery

The scope of delivery includes the PAC25 current clamp and the operating instructions.