Ceramic capacitor voltage division type phase zero sequence voltage sensor

Abstract

The invention provides a ceramic capacitor voltage division type phase zero sequence voltage sensor. The sensor comprises two high-voltage arm capacitors, a high-voltage terminal and a low-voltage arm capacitor; the high-voltage terminal comprises a wiring end and a copper column; the copper column is welded below the wiring terminal; the terminal is connected with a high-voltage line; the two high-voltage arm capacitors are respectively welded on two sides of the copper column; one ends of the high-voltage arm capacitors are welded on the copper column, and the other ends are connected with the positive end of the low-voltage arm capacitor through wires; the two high-voltage arm capacitors are respectively a phase sequence high-voltage arm capacitor and a zero sequence high-voltage arm capacitor; and the low-voltage arm capacitor is formed by connecting a plurality of chip capacitors in parallel. The phase-sequence high-voltage arm capacitor and the zero-sequence high-voltage arm capacitors, which are welded on the copper column, are respectively connected with the low-voltage arm capacitor, and the low-voltage arm adopts a plurality of chip capacitors which are connected in parallel, so that the capacitance and the dielectric loss are relatively stable and do not drift along with the change of positive and negative temperatures, and the product precision is improved; therefore, the requirement of phase voltage signal acquisition precision is met.

Description

technical field [0001] The invention relates to the field of monitoring, in particular to a ceramic capacitance voltage dividing type phase zero-sequence voltage sensor. Background technique [0002] At present, the ceramic capacitor voltage divider voltage sensor has the characteristics of simple manufacturing process, no capacitance attenuation, and small size. It is mainly used for the collection of zero-sequence voltage signals in the large-scale construction of distribution networks. On the one hand, it is inconsistent with the capacitance of the high-voltage arm, which makes it difficult for the ceramic capacitor voltage divider voltage sensor to meet the accuracy requirements in the temperature range, so that it cannot meet the accuracy requirements for collecting phase voltage signals. Contents of the invention [0003] The purpose of the present invention is to provide a phase zero-sequence voltage sensor of the ceramic capacitor voltage division type, which can m...

AI Technical Summary

Problems solved by technology

[0002] At present, the ceramic capacitor voltage divider voltage sensor has the characteristics of simple manufacturing process, no capacitance attenuation, and small size. It is mainly used for the collection of zero-sequence voltage signals in the large-scale construction of distribution networks. On the one hand, it is inconsistent with the capacitance of the high-voltage arm, which makes it difficult for the ceramic capacitor voltage divider voltage sensor to meet the accuracy requirements in the temperature range, so that it cannot meet the accuracy requirements for collecting phase voltage signals

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