Effects of magnetic core geometry on false detection in residual current sensor

Colin, Bruno; Chillet, Christian; Kedous‐Lebouc, Afef; Mas, Patrick

doi:10.1016/j.jmmm.2006.02.273

Cited by 5 publications

(5 citation statements)

References 1 publication

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“…But the analytical relationship of f(dj) is hard to obtain. [5] IV. RCT SIMULA nON AND ANALYSIS As above mentioned, eccentricity /) of conductors in the primary winding and spiral angle <p of the magnetic core have great effect on the transformer.…”

Section: V5-27mentioning

confidence: 99%

Development of a residual current device based on analytical and numerical analysis of the sensitivity and unbalance of current transformer

Guanying

Yang

Wang

et al. 2010

2010 International Conference on Computer Application and System Modeling (ICCASM 2010)

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Based on the analysis of the principle of residual current device (ReO), the impact of sensitivity and unbalance response on the characteristics of residual current transformer (ReT) are discussed in detail. And a kind of ReT is designed by using analytical calculation and numerical simulation methods. Finally, a kind of ReD is developed in this paper.Experimental results show that the designed ReO is of good performance, thus the feasibility of the design is verified.

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Section: V5-27mentioning

confidence: 99%

Development of a residual current device based on analytical and numerical analysis of the sensitivity and unbalance of current transformer

Guanying

Yang

Wang

et al. 2010

2010 International Conference on Computer Application and System Modeling (ICCASM 2010)

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“…They may cause concentration of the flux to the first layer, which can be saturated. These errors are not only of concern in the case of precise sensors, such as current comparators -they may cause abnormal tripping of ordinary current breakers [Colin 2006]. Wide bandwidth: a large frequency range from DC to several MHz is required for applications in switching power converters.…”

Section: Current Sensor Parametersmentioning

confidence: 99%

“…They may cause concentration of the flux to the first layer, which can be saturated. These errors are not only of concern in the case of precise sensors such as current comparators, but they may also cause abnormal tripping of ordinary current breakers (Colin et al 2006).…”

Section: Current Sensor Parametersmentioning

confidence: 99%

Electric current sensors: a review

Ripka

2010

Meas. Sci. Technol.

222

125

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The paper makes a brief overview of traditional methods of measuremet of electric current and shows in more detail relatively new types of current sensors. These include Hall sensors with field concentrators, AMR current sensors, magnetooptical and superconducting current sensors. The influence of the magnetic core properties on the error of the current transformer shows why nanocrystalline materials are so advantageous for this application. Built-in CMOS current sensor are important tools for monitoring of the health of integrated circuits. Of special industrial value are current clamps which can be installed without breaking the measured conductor. Parameters of current sensors are also discussed, including geometrical selectivity. This parameter specific for current sensors means the ability to suppress the influence of currents external to the sensor (including the position of return conductor) and also suppress the influence on the position of the measured conductor with respect to the current.

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“…The ribbon is wound in a spiral manner that has an influence on FRCs. Paper (Colin et al , 2006) shows that the effect of the spiral shape can be separated of others FRC sources. Thus, in this paper, the real spiral shape was replaced by concentric layers.…”

Section: 2d Simulation Of a Multilayer Magnetic Corementioning

confidence: 99%

“…It is strongly suspected that the geometry of the core has a notable impact on the FRC. It has been previously shown that the position of the ribbon ends had an influence on FRC (Colin et al , 2006). This paper concentrates on the multilayer core modelling and its effects.…”

Section: Introductionmentioning

confidence: 99%

Wound magnetic core consequences on false residual currents

Colin

Kedous‐Lebouc

Chillet

et al. 2008

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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PurposeGeometric or magnetic anomalies in the wound magnetic core of a residual current circuit breaker can be responsible of its abnormal tripping. The purpose of this paper is to analyse the core shape contribution to false residual currents (FRCs).Design/methodology/approachTo study precisely the core shape contribution, FEM simulations are investigated. First a 2D multilayer geometry is described thanks to linear regions. Then an apparent anisotropic bulk core is developed and validated in 2D and in 3D.FindingsThe air gaps between the magnetic layers develop a shielding effect responsible of the core high sensibility to primary conductors eccentricity. This effect can be easily represented using an anisotropic bulk core model.Research limitations/implicationsThe anisotropic material model is basic and has known limitations. Future research should see the development of a new model.Originality/valueFRCs can considerably disturb operation of residual current device. This paper provides new hypothesis on the origin of theses currents and proposes an anisotropic magnetic material model that simplifies FRC study.

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Effects of magnetic core geometry on false detection in residual current sensor

Cited by 5 publications

References 1 publication

Development of a residual current device based on analytical and numerical analysis of the sensitivity and unbalance of current transformer

Development of a residual current device based on analytical and numerical analysis of the sensitivity and unbalance of current transformer

Electric current sensors: a review

Wound magnetic core consequences on false residual currents

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