Capacitive-type external voltage sensor used for circuit breaker switch

Abstract

A capacitive-type external voltage sensor used for a circuit breaker switch is disclosed. A fixed pedestal is provided with three phase-zero-sequence integrated sensors. Each phase-zero-sequence integrated sensor comprises a shell. The upper end of the shell is provided with a high voltage end insert. A high voltage end phase sequence polypropylene capacitor, a high voltage end zero sequence polypropylene capacitor, a low voltage end phase sequence polypropylene capacitor, and a low voltage end zero sequence polypropylene capacitor arranged in the shell are encapsulated into an integral module, and form integral sealing with the shell through an epoxy mixture. A fixed insert is arranged below the low voltage end phase sequence polypropylene capacitor and the low voltage end zero sequence polypropylene capacitor. The shell is a silicone rubber material and an internal surface is coated with semi-flowing silicone rubber liquid. The sensor has complete functions, and voltage sampling, measurement, protection, a zero sequence, discharging and other functions are integrated into one body. The weight is light, the size is small, an installation space is saved, field wiring is reduced, the structure is concise and performance is excellent. And installation and replacing are simple, and work efficiency is increased.

Description

technical field [0001] The invention relates to the field of distribution network automation sampling control, in particular to a capacitive external voltage sensor for a circuit breaker switch. Background technique [0002] With the rapid development of electronic technology, microcomputer relay protection devices gradually occupy a dominant position. In relay protection and measurement, the energy flow and information flow of the control part are separated, so the monitoring equipment no longer needs high-power output sensors. Sampling; at the same time, due to the rapid development of the power industry and the more complex grid conditions, intelligent current and voltage transformers that improve power factor and grid quality are widely used; due to the particularity of the switch on the ZW32 circuit breaker column, the sensor of the prior art Single-phase zero-sequence voltage transformers with independent structures, single-phase voltage transformers, and single-phase ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of electronic technology, microcomputer relay protection devices gradually occupy a dominant position. In relay protection and measurement, the energy flow and information flow of the control part are separated, so the monitoring equipment no longer needs high-power output sensors. Sampling; at the same time, due to the rapid development of the power industry and the more complex grid conditions, smart current and voltage transformers that improve power factor and grid quality are widely used; Single-phase zero-sequence voltage transformers, single-phase voltage transformers, and single-phase voltage discharge coils with independent structures have general performance in resisting overvoltage shocks, overcurrent shocks, and harmonic shocks; Large, inconvenient installation and replacement; affect work efficiency; therefore, a capacitive external voltage sensor for circuit breaker switches for power distribution equipment is developed, which is suitable for outdoor environments and provides voltage acquisition signals for power distribution terminal FTU / DTU. A multi-functional integrated three-phase intelligent voltage sensor for voltage sampling, measurement, protection, zero sequence, and discharge is imminent

Images