CT Analyzer Approved for Calibration

March 3, 2009

2 min read

The German National Metrology Institute (Physikalisch-Technische Bundesanstalt/PTB) located in Braunschweig and Berlin has approved the Omicron's CT Analyzer for on-site measurements of current transformers with an accuracy class of >= 0.2 which are in line with the legal calibration standards.

The CT Analyzer is a lightweight instrument designed to meet high standards for performing excitation, ratio, polarity and winding resistance tests on current transformers (CTs) as well as burden-impedance measurement.

The instrument offers fast, comprehensive testing and calibration of current transformers, for protection and metering engineers as well as CT and switchgear manufacturers.

Features include:

Reduced commissioning time due to fully automatic testing.
Allows testing and result assessment according to IEC 60044-1, IEC 60044-6 or IEEE C57.13 (ANSI standard).
Accuracy level (0.02 %/1 min.) enables field calibration and verification of class 0.1 CTs for metering.
Testing and automated assessment of specialized CTs such as TPS, TPX, TPY and TPZ.
Allows testing of CTs for power frequencies from 16,7 to 400 Hz.
Automatic analysis of CTs with unknown data ("name plate guesser" function).
Recalculation of test results after tests with different burden and different primary current (no further on-site measurements).
High level of safety - all tests utilize low voltages (120V)
European Patent EP 1 398 644 A1.
Almost unlimited in: Ratio (50 000 : 1), Primary current (999 000A max.),
Knee point voltage (15kV max.).
Automatic demagnetization of the CT after the test.
Data storage on a removable Compact Flash (CF) card, which can be read by any standard memory card reader.
Remote interface to integrate CT Analyzer into an automatic production process.
Customizable reporting within Microsoft Excel^.
Easy importing and editing into MS Office standard software.