FRANEO 800 The next generation for a reliable core and winding diagnosis of power transformers

The next generation of power transfor Mechanical or electrical problems in power transformer windings, contacts or cores are the result of: >> extraordinarily high mechanical forces, >> shocks due to transportation and seismic activities, or >> mains power failures such as high short-circuit currents. Problems such as these will not necessarily lead to a breakdown, but a power transformer‘s ability to withstand further mechanical loads will be drastically reduced. These problems can be identified with our new FRANEO 800, the successor to the well-established FRAnalyzer, by using the Sweep Frequency...

mer core and winding diagnosis With FRANEO 800 and the SFRA being used you can detect defects as well as faults in the magnetic core, the winding assembly, and the clamping structures of power transformers, such as: >> Axial and radial winding deformation >> Displacements between high- and low-voltage windings >> Partial winding collapse >> Shorted or open turns Deformed core >> Faulty grounding of core or screens Displaced internal connections >> Core movement >> Broken clamping structures >> Problematic internal connections As a result you can improve the reliability of your transformers, reduce...

Sweep Frequency Response Analysis (SFRA) Measuring principle FRANEO 800 injects a sinusoidal excitation voltage with a continuously increasing frequency into one end of the transformer winding and measures the signal returning from the other end. Due to a direct measurement in the frequency domain, no additional data processing is required. The comparison of input and output signals generates a unique frequency response, which can be compared with reference data. Thereby, deviations can indicate changes of internal components. These deviations can be directly related to different sections of...

SFRA as basis for further measurements The SFRA measurement technique is the most sensitive diagnostic method for the detection of mechanical deformations. As the SFRA covers a wide frequency range, electrical defects and faults can also be indicated. SFRA combines different advantages: Based on the SFRA results you can reliably assess the integrity of your power transformer and, if required, derive further diagnostic measurement techniques, such as leakage reactance, exciting current, or winding resistance measurements. These measurements can be performed with our multifunctional CPC 100 + CP...

FRANEO 800 – our new solution for a reliable frequency response Innovative connection technique for the highest level of reproducibility Since SFRA is a comparative method, it is vital that measurements become reproducible. This is the only way to guarantee that deviations between an actual measurement and its fingerprint can be related to defects within the observed transformer. The improved bushing clamps can easily be mounted to transformer bushings, achieving a reliable electrical contact. They provide a high level of cable relief, which increases the longevity of the required accessories....

analysis Powerful features that give you the best measurement support possible Highest dynamic range and accuracy Intelligent sweep settings Due to the innovative measurement concept, high precision measurements can be performed with an accuracy of ± 0.5 dB down to -100 dB. The intelligent sweep settings shorten the measurement duration significantly. The implemented algorithm first performs a broadband measurement and then focusses on the critical frequency areas, achieving more precise measurement results. The low noise floor ensures that even strong attentuated measurement traces can be measured...

Step by step through the test procedure with Primary Test ManagerTM Management of location, asset and test data The Primary Test ManagerTM (PTM) is the ideal software tool for the diagnostic testing and condition assessment of your power transformers. PTM provides a well-structured database for managing SFRA and additional transformer test results to get a comprehensive overview of your asset’s condition. You can define and manage locations, assets, jobs and reports in an easy and fast way. Operating FRANEO 800 with PTM means being compliant with applicable international IEC and IEEE standards...

Execution of diagnostic tests Result analysis and reporting You can select between several predefined test templates. These templates fully comply with current standards and guidelines and always consider the nameplate values that have already been entered. You can also create your own test templates for your individual needs. After the measurement a reference test of the same transformer will be selected automatically. FRANEO 800 provides you with a mathematical solution for comparing the traces based on the Chinese standards DLT 911/2004 or NCPRI. This is a powerful tool for assessing the mechanical...

Technical data and ordering information Technical data FRANEO 800 General Mechanical data Dimensions (w x h x d) 1.8 kg / 4 lb (without measuring cables) Frequency range Environmental Temperature Operating: Storage: Relative humidity Guaranteed accuracy System requirements1 for PTM Operating system Hard disk minimum 5 GB of available space Storage device DVD-ROM drive Graphics adapter Multicore system with 2 GHz or faster Single core system with 2GHz or faster Recommended system requirements marked in bold Graphics adapter supporting Microsoft® DirectX 9.0 or later is recommended. 3 USB 2.0 is...

FRANEO 800 packages Description FRANEO 800 Standard Package Package for performing sweep frequency response analysis (SFRA) on power transfromers, featuring the FRANEO 800 device, dedicated bushing and flange clamps, the aluminium braids as well as the Primary Test ManagerTM (PTM) software for easy operation. FRANEO 800 Standard Package FRANEO 800 accessories and upgrades Description Clamp Set for Short Bushings 2 x Short aluminum braids (1.5 m / 5 ft), 2 x Clamps in a carry bag