ART-3D - Automatic Ratio Tester (TTR)0 pages

TECHNOLOGIES INC.

ART-3D

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
t Real 3 phase test voltage output
t Up to 275 volts output for high accuracy
t Optional tertiary winding channel
t Fully automatic tap changer test mode
t

t Large color, sunlight readable,tt
touch screen display
t USB thumb drive & Ethernet ports
t Easy cable management

FEATURES

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: mkt@ndbtech.com

www.ndbtech.com