Design and Build the 100kV Capacitive Voltage Divider use for High Voltage Engineering Laboratory

Abstract

This paper presents how to design and build the small voltage divider with capacitors type to measure both of AC and DC high voltage which have the rated of voltage is 100 kVp. This thesis focuses on design the capacitor value which are divided to two parts as the main components. In term of high voltage as the first part, the metallized polypropylene film capacitors with 3,300 pF 630 Vdc speci􀅳cation %10 ± are usedfor􀀃series􀀃connection􀀃􀀃of 236 capacitors􀀃13.98 pF total capacitance ,Moreover, the low voltage as the second part, the metallized polyester film cap with 1,500 nF 630Vdc± %5 speci􀅳cation are used for parallel connection of 4 capacitors and 6.14 nF total capacitance. All capacitors are contained in oil as the insulator which has the electrical dielectric is 140 kV/cm. In addition, the ratio of high voltage and low voltage both of AC and DC input are designed in the similar value is 440:1. For the experimental results, this voltage divider can be measure with high accuracy of peak voltage range from 1 kVp - 120 kVp and error less than 3% following withstand test of IEC 60060-2 Standard