Automatic Ratio Testers The ART-3D series of ratio meters are high precision instruments, designed to measure turn ratios, phase displacements, excitation currents of single phase and three phase power, distribution and instrument transformers in conformity to the IEEE C57.12.90 & IEC 60076. COMPETITIVE ADVANTAGES Real 3 phase test voltage output Up to 275 volts output for high accuracy Optional tertiary winding channel Fully automatic tap changer test mode Large color, sunlight readable, touch screen display USB thumb drive & Ethernet ports Easy cable management ART-3D Automatic Ratio Tester With its real 3-phase test circuit, the ART-3D can address complex ratio measurements of PhaseShifting/ Regulating or irregular vector group type transformers, otherwise impossible to achieve with conventional ratio meters. Zigzag type transformers 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 275V contributes to higher magnetisation currents and therefore stronger flux for better signal reflection on secondary and/or tertiary windings allowing more accurate results. The ART-3D phase displacement measurements enables for simple detection of the transformer vector group. CONVENIENCE & PERFORMANCE The instrument’s rugged design is perfectly suited to tackle the most challenging field or manufacturing environments. The anti-induction mode strongly enhances the efficiency of the measurements by countering the unwanted effect of nearby induction interference. The large, high contrast, color, touch screen display offers easy menu navigation, creation of test plans and viewing of test files. The integrated LTC control terminal allows for manual or fully automatic testing sequence of On-Load Tap changers with configurable pulse duration and duty cycle. The additional tertiary winding channel of the ART-3Dx will save a great deal of time, with onetime test connections to primary, secondary and tertiary windings. One of the ART-3D’s key features is the colored and graphical way of displaying LTC test results for interpretation in seconds! Easy to read test results ndb Technologies inc. • 1405 St-Jean-Baptiste, office 111 • Quebec (QC) G2E 5K2 - Canada • Tel: 1(418)877-7701 Fax: 1(418)877-7787 Email: [email protected]

TECHNICAL SPECIFICATIONS ART-3D's intuitive menus, high contrast touch screen, convenient graphical test representation, highest test voltage on the market, long and flex- ible 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. T«lPto» « SHrlTol >w RrauHs File Man aoer Configuration Secondary: LTC.AiitoDisptatenient Test Lead Extension (6m/ 20ft) Ground Cable Power Cable PC Software for remote control Calibration Certificate Shipping Case...

ART-3D Enhanced Test Lead Design It is a fact cables will tangle after usage which creates frustration and downtime for the user. Anybody who ever worked with a multi-cable instrument can relate. With the goal to always improve our products in mind, the test leads were redesigned to solve this issue once and for all. The original version had all clamp’s cable attached to a common connector, which goes on the ART-3D instrument. The new L2 design allows the user to detach the cables from the common connector. ART-3D Automatic Transformer Turn Ratio Instrument Less downtime, less frustration, same...