General
External charger
Optical USB cable
Operating instructions

This product is a complete package for grounding measurements on high-voltage poles with earth wire, developed by Chauvin Arnoux. It is intended for testing and maintenance of grounding and lightning protection systems in high-voltage networks. The set enables measurements during operation without interrupting power supply and provides comprehensive data on the electrical quality of grounding installations. The central component is the grounding and earth resistance meter C.A 6472, used in combination with the Pylon Box C.A 6474 to perform precise measurements on poles. The measurement is carried out via four flexible AmpFLEX current transformers attached to the pole feet, allowing for quick and adaptable installation on various pole designs.

Applications
This set is specifically designed for testing high-voltage poles, particularly those equipped with an earth wire. It is used to determine the total impedance of the line, the grounding resistance of the entire pole, the resistance of individual pole feet, and the chain ladder impedance via the earth wire. These parameters are crucial for assessing the safety and efficiency of grounding installations, especially regarding lightning protection and transient voltage behavior. Measurements can also be performed to analyze grounding loop behavior during lightning strikes, for which the C.A 6472 offers a wide frequency measurement range from 41 Hz to 5078 Hz.

Functions and Equipment in Detail
The grounding meter C.A 6472 supports various measurement methods, including 3-pole measurements up to 10 kΩ, selective 3- and 4-pole measurements, and loop measurements with two clamps in the range of 0.01 Ω to 500 Ω. Additional functions include earth coupling measurements, soil resistance measurements using Wenner or Schlumberger methods, earth potential measurements, continuity and grounding resistance measurements, as well as special grounding measurements for line poles. The Pylon Box C.A 6474 serves as an interface between the measuring device and the pole feet, enabling measurement without physically interrupting the grounding. The four AmpFLEX current transformers, each with a 5 m loop length, allow flexible attachment to different pole constructions.

Technology Explained Simply
The technology is based on measuring current and voltage in the grounding system to determine resistance and impedance. The AmpFLEX current transformers capture the current flowing through the pole feet, while the C.A 6472 measures the voltage. The combination of current and voltage measurement enables the calculation of grounding resistance. The frequency dependence of the measurement (41 Hz to 5078 Hz) allows detailed analysis of grounding behavior under various conditions, especially during transient events such as lightning strikes. The optical USB interface enables data transfer to a PC, where the software PC Ground Tester Transfer is used for evaluation and documentation of measurement results.

Compatibility and Accessories
The set is specifically designed for use with the grounding meter C.A 6472 and extends its functionality for measurements on high-voltage poles. The Pylon Box C.A 6474 is directly compatible with the C.A 6472 and enables measurement without interrupting grounding. The comprehensive grounding accessory set with 100 m length supports detailed analysis of grounding and lightning protection installations. The software PC Ground Tester Transfer is intended for data evaluation on a PC and connects to the device via the optical USB interface.

Installation and Mounting
Installation is performed by attaching the four AmpFLEX current transformers to the pole feet. The flexible design of the transformers allows adaptation to various pole diameters and shapes. The Pylon Box is connected to the pole and linked to the C.A 6472. Measurements can then be carried out without interrupting power supply. The external charger provides power for the NiMH battery in the measuring device, ensuring mobile use. The carrying case offers protection and transport options for all components.

Operational Advantages
The set enables comprehensive analysis of grounding installations on high-voltage poles in a single measurement process. Measurements are performed without interrupting operations, maintaining system availability. The flexible mounting of the AmpFLEX transformers and the broad functionality of the C.A 6472 ensure high adaptability to different pole types and measurement tasks. Data storage for up to 512 measurements and the ability to evaluate results on a PC increase the efficiency of documentation and analysis. The IP53 protection rating safeguards the device against dust and splashing water, making it suitable for outdoor use.