10 kV passive electronic voltage transformer

Abstract

The invention discloses a 10 kV passive electronic voltage transformer which does not need an external adjusting circuit board and has stable electrical parameters. In an insulator, a high-voltage insulated conductor, a high-voltage section resistor, a phase-shifting capacitor, a thermistor and a trimmer resistor are connected with a low-voltage section resistor in series; the joint of the phase-shifting capacitor and the thermistor and the lower end of the low-voltage section resistor respectively lead out a signal line; the two ends of a piezoresistor are respectively connected with the low-voltage section resistor and to ground; the low-voltage section resistor and the high-voltage section resistor are manufactured on the same ceramic tube; and the low-voltage section resistor, the high-voltage section resistor, the phase-shifting capacitor, the thermistor, the piezoresistor and the trimmer resistor are arranged in an integral metal shielding looped network. The electronic voltage transformer is used for electric energy metering in the 10 kV power system, is used for safe and reliable basic electrical appliances for protecting user power equipment and has obvious energy saving effect.

Description

Technical field [0001] The invention relates to a voltage conversion device in a 10KV power system, that is, an electronic voltage transformer, especially a 10KV device capable of stabilizing the ratio difference and angle difference of electric parameters in the case of a passive circuit board that does not use electric parameters to adjust Passive electronic voltage transformers. Background technique [0002] At present, the main structure of the known 10KV resistance divider voltage transformer is to manufacture high-voltage segment resistors and low-voltage segment resistors separately and then assemble them together. As a result, the manufacturing process is many, the volume is large, and the consistency of the parameters of the two segment resistances is not easy to guarantee. ; The adjustment of the parameters of the traditional 10KV resistance divider voltage transformer is completed by a special electrical parameter adjustment circuit board. As a result, power must ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages that the existing 10KV resistance divider electronic voltage transformer must have an adjustment circuit board, the ratio difference and angle difference of electrical parameters are unstable, the shielding effect is poor, and the measurement accuracy is easily affected, the present invention provides a 10KV Passive electronic voltage transformer, the 10KV passive electronic voltage transformer not only abandons the adjustment circuit board with power supply, reduces the volume of the transformer, but also greatly improves the electrical parameter ratio difference and angle of the transformer. Poor stability, better shielding effect, and at the same time help to improve the accuracy of energy measurement

Images