| Title |
Fabrication and Its Characteristics of 7-dial Inductive Voltage Divider for Low Frequency |
| Keywords |
권선 ; 전압비 교정 IVD(Inductive Voltage Divider ; Totoidal core ; Inphase ; Quadrature error |
| Abstract |
The 7-dial inductive voltage divider(IVD) for application at low frequency range which can precisely divide the in put voltage up to resolution of 10^{-7} was fabricated by using the toroidal cores made by super-mumetal strips of 0.025 mm thick and special decade switches. The cores have the initial permeability of 200.000 and magnetic flux density of 0.5 T. The inphase and quadrature ratio errors for a fabricated 7-dial IVD are found to be less than pm4×10^{-7} and pm5×10^{-6} rad(k=2), respectively. by calibration using the IVD calibration system of KRISS. The fabrication techniques used and uncertainty evaluation are discussed in this paper. |