Electronic Three-Phase Four-Wire Power-Frequency Converter With High Accuracy Over a Wide Range of Use
- 1 November 1971
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. IM-20 (4) , 308-312
- https://doi.org/10.1109/TIM.1971.5570659
Abstract
This paper describes a new type of power-frequency converter with an electronic measuring device. It is of the three-phase four-wire type and was developed in the Physikalisch-Technische Bundesanstalt (PTB) especially for the precision measuring of electrical energy in high-voltage circuits. It has an accuracy of 10-3 over a current range of 1: 100. The measuring elements use the time-division principle. The wide current range is achieved by commutating the charging current for the integrating circuit. The running (indication) of the instrument with no load is eliminated. The specifications are much better than those of a high-precision rotor-type meter of class 0.5 (Recommendations of the International Electrotechnical Commission-IEC).Keywords
This publication has 1 reference indexed in Scilit:
- Precision Measuring Equipment for Electrical Power in the Range of Audio FrequenciesIEEE Transactions on Instrumentation and Measurement, 1966