Capacitive-type external voltage sensor used for circuit breaker switch

A circuit breaker switch and voltage sensor technology, applied in the direction of measuring current/voltage, only measuring voltage, instruments, etc., can solve the problem of general anti-overvoltage impact, anti-overcurrent impact and anti-harmonic impact performance, inconvenient installation and replacement, etc. Affect work efficiency and other issues, achieve the effect of less electromagnetic field interference, simple structure, and improve work efficiency
CN108802478APending Publication Date: 2018-11-13JIANGSU JINGJIANG INSTR TRANSFORMER FACTORY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU JINGJIANG INSTR TRANSFORMER FACTORY
Publication Date
2018-11-13

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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.
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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 ...

Claims

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