Traceable electric current clamp meter calibration using current coil
Marcelo Costa
Abstract:
This paper presents a procedure for electric current clamp meters calibration in the range of 20 A to 1000 A, DC and low frequency, using a multifunction calibrator as working standard and a current coil for multiplication of the current generated by the calibrator. This procedure is an alternative for calibration techniques that employ high current sources and standard current transformers. Some calibration results are presented and analysed. Measurement uncertainty of about 2 × 10-3 at 200 A (60 Hz) for toroidal-wound clamp meter calibration can be obtained.
