Automatic_Ratio_Tester
2Pages

Testing Applications The PATTR-3D ratio meter is a high precision instrument, designed to measure turn ratios, phase displacements, excitation currents of single phase and three phase power, distribution and instrument transformers in compliance with IEEE C57.12.90 and IEC 60076 standards. V Real 3-phase test voltage output V Up to 275 Volts output for high accuracy V Optional tertiary winding channel V Fully automatic tap changer test mode V Large color, sunlight readable, touch screen display V USB thumb drive and Ethernet ports V Easy cable management Convenience and Performance • Rugged design is perfectly suited to tackle the most challenging field or manufacturing environments. • Anti-induction mode strongly enhances the efficiency of the measurements by countering the unwanted effect of nearby induction interference. • Large, high contrast, color, touch screen display offers easy menu navigation, creation of test plans and viewing of test files. • Integrated LTC control terminal allows for manual or fully automatic testing sequence of On-Load Tap changers with configurable pulse duration and duty cycle. AUTOMATIC KATftl TESTER • Additional tertiary winding channel saves time, with one-time test connections to primary, secondary and tertiary windings. • Colored, graphical display of LTC test results becomes available for interpretation in seconds. With its real 3-phase test circuit, the PATTR-3D can address complex ratio measurements of Phase- Shifting/ Regulating or irregular vector group type transformers, otherwise impossible to achieve with conventional ratio meters. Zigzag type transformer testing is very easy and will not require the installation of jumpers or the use of relay matrix circuits. The single or real 3-phase voltage output up to 275 V contributes to higher magnetisation currents and therefore stronger flux for better signal reflection on secondary and/or tertiary windings allowing more accurate results. The PATTR-3D phase displacement measurements enables for simple detection of the transformer vector group. PORTABLE TRANSFORMER Specifications are subject to change without notice.

With PATTR-3D's intuitive menus, high contrast touch screen, convenient graphical test representation, highest test voltage on the market, long and flexible multipurpose test leads configuration, real 3-phase output, the widest range of applicable transformer types, it has never been so simple and easy to achieve high accuracy Transformer Turn Ratio measurements. Ratio range • Test Leads, 30' (9 m) • Test Lead Extension, 20' (6 m) • Tap Changer Cable • Ground Cable • Power Cable • PC Software for remote control • Calibration Certificate • Shipping Case (optional) Easily detach the cables...