Electrical endurance and reliability of circuit-breakers-common experience and practice of two utilities

Pons, A.; Sabot, A.; Babusci, G.

doi:10.1109/61.180333

Cited by 29 publications

(5 citation statements)

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“…The calculation accumulates the corresponding electrical abrasion suffered at each breaking current by means of the equivalent abrasion curves under the different breaking currents of circuit breakers. The curves are similar to ones referred as the article [3]. The permissible total amount of electrical abrasion of each circuit breaker is determined according to its rated short-circuit breaking current and the permissible breaking times under full capacity.…”

Section: Electrical Life Of Contactorsmentioning

confidence: 92%

Research on an Online Monitoring and Diagnosis System of High-Voltage Circuit Breaker

Wang

2014

AMM

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The principle of an online monitoring and diagnosis system suitable for various kinds of High-voltage Circuit Breakers (HVCB) is presented in the paper. The system consists of distributed data acquisition devices, a communication system based on field bus, and a host based on B/S structure. The research presents the methods to select the main monitoring signals of high-voltage circuit breakers, to acquire data, and to calculate operational feature values, as well as realizes high-speed process to monitoring signals, valid online monitor to high-voltage circuit breakers, and fault diagnosis.

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Section: Electrical Life Of Contactorsmentioning

confidence: 92%

Research on an Online Monitoring and Diagnosis System of High-Voltage Circuit Breaker

Wang

2014

AMM

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“…Determination of the electrical endurance of circuit breakers has been constantly under consideration in the existing literature. An ongoing attempt has been made to determine the remaining lifetime of interruption chambers by defining thermal stress indices like peak short-circuit current [16], transferred electric charge [17], and arc energy [18]. The results of this paper show how dependent the contact mass loss is on the microstructural characterization of contacts.…”

Section: Introductionmentioning

confidence: 97%

Impact of Surface Morphology on Arcing Induced Erosion of CuW Contacts in Gas Circuit Breakers

Mohammadhosein

Niayesh

Akmal

et al. 2018

2018 IEEE Holm Conference on Electrical Contacts

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In this paper, the impact of surface morphology of contacts, in particular different microstructural parameters like size and distribution of contact ingredients, on contact erosion in high voltage gas circuit breaker is investigated. It is demonstrated that the size and contiguity of copper and tungsten zones play a key role in contact erosion so that the mass loss in one specific contact after interruption of the rated short-circuit current is 2.5 times higher than that of another one, with the same dimensions and material composition. It is shown that the arc roots tend to be formed on larger copper zones and if the zones are not confined by tungsten area, the arc cross section expands resulting in a higher evaporation rate of copper areas. In addition, it is emphasized that ejection of tungsten particles after evaporation of surrounding copper areas is another mechanism leading to more contact erosion, which has to be taken into consideration in contact erosion modeling along with molten contact splash and vaporization. Index Terms-arc contacts, contact erosion, contact morphology, microstructural image of contact surface.

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“…Among different methods of condition monitoring, non-invasive online procedures having the opportunity to become integrated into power the system operations, take the highest priority to estimate circuit breaker remaining life and to monitor its ageing. Those methods are able to provide the data required for making the decision of when and how the circuit breaker is supposed to be maintained in condition-based maintenance (CBM) and reliability-centred maintenance (RCM) methods [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, the determination of an easy-to-measure parameter indicating the mass loss after every interruption has been under consideration in the existing literature. The number of interruptions, the current amplitude [1], transferred electric charge [22], and arc energy [23] have been proposed as thermal stress indices to evaluate contact mass loss. The proposed methods using current instantaneous amplitude take advantage of simple availability of measured current by protective relays.…”

Section: Introductionmentioning

confidence: 99%

Online non‐invasive evaluation of arcing time for condition assessment of high‐voltage gas circuit breakers

Mohammadhosein

Niayesh

Akmal

et al. 2021

IET Generation Trans & Dist

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Online non‐invasive methods to assess circuit breaker condition have been under consideration in recent years. The combination of the arcing time and the short‐circuit current recorded by protective relays can be utilized to assess the degrading impact of current interruption on arcing contacts. In many previous investigations, an integral over arcing time of different functions of current and voltage has been proposed to predict the erosion rate of arcing contacts. Although the arcing time is a crucial parameter for these indices, no easily adaptable method to online condition assessment is available. This paper proposes a method for online determination of arcing time based on the measurement of the switching time of the auxiliary contacts. Several experiments have been performed under no‐load conditions as well as during short‐circuit current interruption, on two circuit breakers with different trip coil excitations (AC and DC). The results show that the delay time between the contact separation instant of the arcing contacts and the switching time of the auxiliary contacts has a very low jitter. This enables precise determination of the arcing time by measurement of the switching time of the auxiliary contacts, which is accessible during the online operation of circuit breakers.

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Electrical endurance and reliability of circuit-breakers-common experience and practice of two utilities

Cited by 29 publications

References 0 publications

Research on an Online Monitoring and Diagnosis System of High-Voltage Circuit Breaker

Research on an Online Monitoring and Diagnosis System of High-Voltage Circuit Breaker

Impact of Surface Morphology on Arcing Induced Erosion of CuW Contacts in Gas Circuit Breakers

Online non‐invasive evaluation of arcing time for condition assessment of high‐voltage gas circuit breakers

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