When conducting a grid analysis, choosing the right grid analyser is critical to gaining accurate and comprehensive insights into the quality and performance of the power grid. Grid analysers, also known as grid analysis meters, are specialised instruments that can measure a variety of parameters such as voltage, current, power, frequency, harmonics and transients. These devices are available in both mobile and stationary versions to meet different application requirements. Important aspects when differentiating between grid analysers: Measuring accuracy and sampling rate: High measurement accuracy and a sufficient sampling rate are crucial in order to be able to detect even fast and short disturbances in the grid. Detection range of parameters: Good power system analysers should be able to measure a wide range of parameters, including voltage, current, power, frequency, harmonics, flicker and transients. Mobility and flexibility of use: Handy, mobile devices are particularly suitable for service calls or temporary measurements at different locations. Stationary devices are intended for permanent installations and continuous monitoring tasks. Data storage and transmission: An integrated logger function for data storage and the ability to transfer data to PCs or via networks are essential for carrying out long-term analyses and saving data for later evaluation. User-friendliness and software support: Intuitive operation and powerful, user-friendly software for data evaluation facilitate handling and analysis. Different versions of measuring devices for analysing the grid: Mobile power grid analysers: The mobile power grid analysers from A. Eberle are extremely robust, powerful & user-friendly portable power quality analysis measuring devices, frequency analysers, power meters and transient recorders all in one. These power analysers have been developed with a particular focus on simple and intuitive operation. This makes them ideal for field technicians and for general diagnostics at various measuring points when measuring deep in the grid. The »PQ-Box family« has an autonomous power supply and a large display (from »PQ-Box 150«). The extensive catalogue of accessories consists of components such as current clamps and Rogowski coils, which enable the measured values to be recorded without direct intervention in the cabling and make the measurement experience convenient and efficient. Permanently installed / stationary power quality analysers: Designed for permanent installation in switchgear or on top-hat rails, these devices offer continuous monitoring of the power quality and are often designed for connection to central control systems. The permanently installed fault recorders and power quality network analysers »PQI-DA smart«, »PQI-DE« and »PQI-D« are the central components in a system that can be used to solve all measurement tasks in a low, medium and high-voltage grid. The analysers can be used as fault recorders with a sampling rate of up to 41 kHz, as power quality measuring devices in accordance with EN50160 / IEC 61000-2-2/4 or as power analysers. Measurement technology for grid analysis by A. Eberle: A. Eberle GmbH & Co. KG is active in the field of measurement and control technology for the energy sector and medium-sized and large industrial companies. Our products and services secure and improve the availability of energy supply and help to integrate renewable energy sources into the grids. We not only offer you power quality services, but are also an internationally active and renowned manufacturer of solutions in the following fields:  »REGSys« - automatic voltage regulation for transformers with tap-changer  »LVRSys« - low-voltage regulation as an economical & efficient alternative to line expansion  »PQSys« - fixed installed power quality-analysers with fault recorder function  »PQMobil« - mobile power quality-analysers & data logger  »EORSys« - short-circuit and earth fault detection  »EORSys« - earth fault compensation & current injection  SCADA: secure communication Our customers are: TSOs (transmission system operators) DSOs (distribution system operators) Energy supply companies that are active at all voltage levels Large and medium-sized industrial companies from all sectors of the economy that have their own power supply