The Zero-Flux DC Current Transformer a High Precision Bipolar Wide-Band Measuring Device
- 1 June 1977
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 24 (3), 1810-1811
- https://doi.org/10.1109/tns.1977.4329095
Abstract
A current-carrying conductor is surrounded by a pair of ring cores. A sense winding on one core provides flux rate feedback to a power amplifier which drives the ampere-turn compensating current through a common compensating winding. The other core serves as a second-harmonic modulator to establish zero-flux operation and thus to ensure a perfect, temperature-independent current balance. A specially-developed burden resistor converts the compensating current into a voltage signal, which is amplified to give a 10 V output signal at the nominal value of the current to be measured. A substantial number of devices, ranging from 50 to 25000 Amperes is now operational in the beam transfer and extraction power supplies for the CERN SPS.Keywords
This publication has 1 reference indexed in Scilit:
- Accurate measurement of d.c. and a.c. by transformerElectronics & Power, 1977