Title :
Grounding resistance measuring instrument controlled by a microcomputer and a bias magnetic regulator
Author_Institution :
Center for Space Sci. & Appl. Res., Acad. Sinica, Beijing, China
Abstract :
The author has successfully developed a grounding resistance measuring instrument controlled by a microcomputer. The instrument can regulate the measuring loop current precisely by the bias magnetic theory of double iron cores and adopt a flexible software to eliminate the error. Tests have shown that the measuring error is less than 0.5%. The instrument thus satisfies precisely the IEC stipulations for measuring grounding resistance of electrical equipment.
Keywords :
computerised instrumentation; controllers; earthing; electric current control; electric resistance measurement; magnetic devices; measurement errors; measurement standards; microcomputer applications; IEC stipulations; bias magnetic regulator; bias magnetic theory; double iron cores; electrical equipment; flexible software; grounding resistance measuring instrument; measuring error; measuring loop current; microcomputer; Current measurement; Electrical resistance measurement; Grounding; IEC; Instruments; Iron; Magnetic cores; Microcomputers; Software measurement; Testing;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.546535
