Miniature breaker with novel current detection assembly

By using Hall magnetic field sensors and current detection wires in the circuit breaker, combined with difference processing technology, the problem of inaccurate detection of current transformers in the circuit breaker is solved, and accurate detection of current and accurate control of the circuit breaker are achieved.

CN108172476AActive Publication Date: 2018-06-15SHENZHEN MANTUNSCI TECH CO LTD
5 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN MANTUNSCI TECH CO LTD
Filing Date
2018-02-02
Publication Date
2018-06-15

AI Technical Summary

Technical Problem

The current transformer used in the existing circuit breaker cannot accurately detect the current size, resulting in the inability to accurately determine the closing and opening timing of the circuit breaker.

Method used

Using Hall magnetic field sensor, current detection wire and Hall magnetic field sensor detection circuit board, the magnetic core-free Hall magnetic field sensor detects the magnetic field generated by the current flowing through the current detection wire, and processes the difference between the detection and the environmental magnetic field to eliminate Background magnetic field interference, accurate detection of current size.

Benefits of technology

It achieves accurate detection of current, avoids current value attenuation caused by magnetic core saturation, and ensures more accurate control of the circuit breaker during opening and closing operations.

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Abstract

The invention provides a miniature breaker with a novel current detection assembly. The miniature breaker with a novel current detection assembly includes a breaker main body and a novel current detection assembly, wherein the novel current detection assembly includes a Hall magnetic field sensor, a current detection wire, and a Hall magnetic field sensor detection circuit board; a detection Hallmagnetic field sensor in the Hall magnetic field sensor without a magnetic core is used to detect a magnetic field which is generated from the current detection wire, and an environment Hall magneticfield sensor in the Hall magnetic field sensor is used to detect a background magnetic field in the environment; and the difference values detected by the detection Hall magnetic field sensor and theenvironment Hall magnetic field sensor are processed to obtain the magnitude of the current, so as to eliminate the interference of the background magnetic field and enable the detected current to bemore accurate. Therefore, the breaker with the novel current detection assembly can accurately perform opening and closing.
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Citation Information

Patent Citations

  • Measuring device for transient state magnetic field in miniature circuit breaker arc extinguish chamber

    CN103954919A

  • Current sensor and electric device mounted with said sensor

    CN1149723A

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    CN207834228U

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    US6628495B2

  • Circuit breaker

    WO2009010154A2

Cited By

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