Characterization of contacts degradation in circuit breakers through the dynamic contact resistance

Souza, Ronimack Trajano de; Costa, Edson G. da; Oliveira, Adriano Costa de; Sousa, W. de V.; Morais, Tiago

doi:10.1109/tdc-la.2014.6955259

Cited by 14 publications

(8 citation statements)

References 2 publications

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“…The dynamic contact resistance is measured during the breaking tests. In paper [4,5], a dynamic contact resistance measuring device based on Arduino software and hardware platform was developed. The device is used to measure the dynamic contact resistance of the low-voltage circuit breaker, and it is more effective to evaluate the state of the arc extinguishing chamber of the circuit breaker.…”

Section: Introductionmentioning

confidence: 99%

Study of Ablation of Arc Contacts and Dynamic Contact Resistance in High Current Breaker

Xing

Zhang

Tong

et al. 2020

J. Electr. Eng. Technol.

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The fault of power circuit breaker (PCB) can lead very serious problems, especially in high voltage-power grid. The structure of contacts may be composed of main contacts and arc contacts, and this structure can avoid ablation of main contacts efficiently. It is necessary to study the eroded state of the arc contacts and the dynamic contact resistance of arc contacts to estimate the operating state of the PCB. The wear of contacts contains arc ablation and mechanical wear through the characteristics of contacts. The arc ablation is caused by the high temperature of the arc and the mechanical wear is caused by the mechanical friction of static and movable contacts. Some experiments have been done under different size of contacts and different current through them. The results show that the mechanical wear increases, sometimes heavier, with the increase of the size of fixed contacts and the decrease of the size of movable ones because the force between fixed and movable contacts becomes larger. The results also show that the ablation of arc contacts increases with the increase of current, especially when the current is up to 20 kA. With the high temperature of arc reaching the hardness point of copper, the arc ablation and mechanical erosion are increasing obviously since the contacts become soft and easy to wear. Another result of the study shows it is important to choose the material of contacts and the force between movable and fixed contacts. The harder and less resistance the material of contacts, the better the operating situation. To monitor the operating situation of the breaker, the dynamic contact resistance was measured 25 times. As a result, the dynamic contact resistance is sensitive to the current and increasing with the increase of continuous experiment time because of the increasing of metal ions. Furthermore, if the SF 6 in the PCB is changes, the dynamic contact resistance would be changed. The dynamic contact resistance in this experiment varies substantially within the range of 80-250 μΩ at the current of 20 kA.

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Section: Introductionmentioning

confidence: 99%

Study of Ablation of Arc Contacts and Dynamic Contact Resistance in High Current Breaker

Xing

Zhang

Tong

et al. 2020

J. Electr. Eng. Technol.

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“…Nonetheless, in [13] it is reported that the method presented by [12] can damage some breaker mechanism when restoring it back into service since it requires the substitution of the standard operating mechanism by an auxiliary mechanical device. However, in [14] it is presented that the DRM can be used at the nominal speed since the injection system has a value of 300 A as applied DC current. In addition, [14] reinforces the use of the area under the DRM curve as a valid evaluating parameter for contact degradation.…”

Section: Introductionmentioning

confidence: 99%

“…However, in [14] it is presented that the DRM can be used at the nominal speed since the injection system has a value of 300 A as applied DC current. In addition, [14] reinforces the use of the area under the DRM curve as a valid evaluating parameter for contact degradation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of alternative parameters of dynamic resistance measurement in high voltage circuit breakers

et al. 2019

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Throughout its lifetime, high-voltage circuit breaker (HVCB) contacts suffer from inevitable degradation processes, especially during the formation of electric arcs. Highly degraded contacts can reduce the current interruption capacity and increase the chances of operational faults, which might lead to considerable financial losses. Therefore, the use of efficient evaluating techniques is a key factor to achieve systems reliability. The dynamic resistance measurement (DRM) is a technique that can be used to evaluate the degradation level of HVCB' contacts. It stands out from the usual technique, static resistance measurement, by allowing the assessment of both the main contacts and the arcing contacts (ACs). Usually, the mean resistance or the area under the DRM curve is used to estimate the AC degradation. However, DRM is a non-standardised technique and there are no specified parameters to evaluate the real wear conditions. Therefore, an analysis of alternative parameters extractible from the DRM technique is presented in this study, such as amplitude and variance of the DRM curve. The results attest the possible use of more than one parameter for the continuous evaluation of HVCB ACs, characterising the DRM as a more complete and precise diagnosis tool.

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“…The arcing contacts get eroded and become shorter after each opening operation due to arc energy. Severely eroded arcing contacts may directly reflect the considerable decrease in the breaking capacity of CBs [1–3]. Therefore, the erosion of arcing contacts is a critical parameter for the condition assessment of contact sets.…”

Section: Introductionmentioning

confidence: 99%

“…Dynamic contact RM (DRM) is proved to be an effective method to diagnose the extinguishing chamber [1–3, 6–12]. Four‐line method and high DC amperages are usually applied in DRM to assure high accuracy of the test results [9–11].…”

Section: Introductionmentioning

confidence: 99%

Electrical erosion test and condition assessment of SF ₆ CB contact sets

Chen

Lan

Pan

et al. 2017

IET Generation, Transmission & Distribution

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Characterization of contacts degradation in circuit breakers through the dynamic contact resistance

Cited by 14 publications

References 2 publications

Study of Ablation of Arc Contacts and Dynamic Contact Resistance in High Current Breaker

Study of Ablation of Arc Contacts and Dynamic Contact Resistance in High Current Breaker

Analysis of alternative parameters of dynamic resistance measurement in high voltage circuit breakers

Electrical erosion test and condition assessment of SF ₆ CB contact sets

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Characterization of contacts degradation in circuit breakers through the dynamic contact resistance

Cited by 14 publications

References 2 publications

Study of Ablation of Arc Contacts and Dynamic Contact Resistance in High Current Breaker

Study of Ablation of Arc Contacts and Dynamic Contact Resistance in High Current Breaker

Analysis of alternative parameters of dynamic resistance measurement in high voltage circuit breakers

Electrical erosion test and condition assessment of SF 6 CB contact sets

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Product

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Electrical erosion test and condition assessment of SF ₆ CB contact sets