Influencing of Current Sensors by an External Magnetic Field of a Nearby Busbar
Based on several identified erroneous current measurements using clamping current measuring transformers, a methodology for detecting the influence of near busbar magnetic field to current sensors was designed and tested. With a 600 A current in the busbar, the ammeters and current sensors showed a current of up to 11 A, even if they did not cover any conductor. The error was dependent on the position of the current sensor and also the distance. Measurement errors were detected by some sensors even more than 50 cm from the busbar. To compare individual ammeters and current sensor a method was proposed to measure and calculate relative error value in percent of current range per kiloampere of interfering busbar current.
KeywordsCurrent measurement error Current sensor crosstalk error Disturbing magnetic field Busbar magnetic field Current sensor
This research was partially supported by the SGS grant from VSB - Technical University of Ostrava (No. SP2018/61) and by the project TUCENET (No. LO1404).
- 1.Chauvin Arnoux Metrix. http://www.chauvin-arnoux.com/en/produit/mn71.html. Accessed 31 Mar 2018
- 2.Bouakoura, M., Nait-Said, N., Nait-Said, M.S., Belbach, A.: Novel speed and current sensor FDI schemes with an improved AFTC for induction motor drives. Adv. Electr. Electron. Eng. 16(1), 1–14 (2018)Google Scholar
- 3.Chauvin Arnoux Metrix. http://www.chauvin-arnoux.com/en/produit/a110-ampflex-sup-reg-sup.html. Accessed 31 Mar 2018
- 4.Geng, G., Yang, X., Gao, Y., Hammond, W., Xu, W.: Non-invasive current sensor for multi-core cables. IEEE Trans. Power Delivery (Early access), 1–8 (2017). https://doi.org/10.1109/TPWRD.2018.2813540
- 7.Ripka, P., Chirtsov, A.: Busbar current transducer with suppression of external fields and gradients. IEEE Trans. Magn. 1–4 (2018)Google Scholar
- 8.RE9030, Range Digital Multimeter. http://www.range.com.hk/products/RE9030.html
- 9.Prova 23 Power Harmonics & Current Leakage Multifunction Clamp Meter. https://www.test-equipment.com.au/prova-23-power-harmonics-current-leakage-multifunction-clamp-meter/. Accessed 31 Mar 2018
- 10.Chauvin Arnoux Metrix. http://www.chauvin-arnoux.com/en/produit/f205.html. Accessed 31 Mar 2018
- 11.ENA330 (PQA) - Elcom, a.s. https://www.elcom.cz/en/product/test-and-measurement/electrical-network-analyzers/instruments/ena330. Accessed 31 Mar 2018