Ageing of metal oxide varistors due to surges

Salles, C. de; Martinez, M.L.B.; Queiroz, Álvaro Antônio Alencar de

doi:10.1109/sipda.2011.6088462

Cited by 20 publications

(10 citation statements)

References 3 publications

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“…The avionics designers use mainly the TVS for surge protection. MOVs are avoided because their behavior changes with aging [18], while the GDT exploits electric arcing phenomena that can't be easily controlled on DC power lines . Unfortunately, TVSs disturbs the PLC signal due to the parasitic elements in these devices.…”

Section: Protectionmentioning

confidence: 99%

Optimised PLC power transfer on avionic DC Power Lines: Coupling circuit and lightning protection

Brison

Bensetti

Lacerda

et al. 2017

2017 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC)

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Abstract-Power Line Communication (PLC) systems are good candidates for next-generation aircraft communication channels. On-board power buses must meet stringent safety requirements that mandate the use of Transient Voltage suppressors (TVS) for lightning protection. These devices strongly degrade the performance of the communication channel. In this paper we analyze the impact of the lightning protection circuit used in aircraft power buses both theoretically and experimentally. It is shown that TVS devices are responsible for distortion and attenuation in the PLC signal band (1 MHz -100 MHz). We introduce a novel co-design strategy, matching PLC coupler to lightning protection conforming to air travel safety regulations. Our experimental results demonstrate that both constraints can be met using our proposed architecture.

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Section: Protectionmentioning

confidence: 99%

Optimised PLC power transfer on avionic DC Power Lines: Coupling circuit and lightning protection

Brison

Bensetti

Lacerda

et al. 2017

2017 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC)

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“…Thermal runaway tends to result in electrical hazards, such as short circuits or explosions. Thus, the MOV is designed with a thermal fuse spring or thermal fuse to prevent thermal runaway [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost Surge Current Detection Sensor with Predictive Lifetime Display Function for Maintenance of Surge Protective Devices

Lee

2020

Sensors

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In this study, a low-cost surge current detection sensor (SCDS) that can measure high current surges using a low-current toroidal coil is proposed for maintenance of a surge protective device (SPD). The proposed SCDS is designed to display the predicted lifetime of the SPD based on the magnitude of surge current and number of surges. In addition, a method for measuring high surge current using a toroidal coil that can usually measure only low current is proposed. A lightning strike counter consists of a microcontroller with a low-power liquid crystal display (LCD) driver, 3 VDC lithium battery, and signal conditioning circuit that converts amplitude information of the surge current into duration information of a negative pulse to facilitate processing in the microcontroller. In this paper, we propose a software algorithm that can calculate the remaining lifetime of SPD based on the amplitude and number of surge currents. There is also an option to select the capacity of the surge protective device and the number of phase lines, allowing it to assess the predicted lifetime for various types of Class II SPDs. The proposed SCDS is measured as 7.2 μA from the battery power consumption test, and the service life is calculated to be 11.1 years. It meets the International Standard IEC62561-6 test conditions of the lightning strike counter and is expected to be useful in the maintenance of SPDs and lightning protection systems.

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“…Currently, an 8/20 µs single pulse waveform had been adopted for such tests [3,4]. A host of studies have been presented regarding the performance changes that occur in ZnO varistors under single pulse lightning impulses [5][6][7][8]. However, modern lightning observations and artificially triggered lightning acquisition data have shown that two-thirds of the lightning events in natural settings are a multi-pulse process.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of the Failure Mode of ZnO Varistors Under Multiple Lightning Strokes

Zhang

Xing

et al. 2019

Electronics

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In this study, in order to explore the failure mode of ZnO varistors under multiple lightning strokes, a five-pulse 8/20 μs nominal lightning current with pulse intervals of 50 ms was applied to ZnO varistors. Scanning electron microscopy (SEM) and X-ray diffractometry (XRD) were used to analyze the microstructure of the material. The failure processes of ZnO varistors caused by multiple lightning impulse currents were described. The performance changes of ZnO varistors after multiple lightning impulses were analyzed from both macro and micro perspectives. According to the results of this study’s experiments, the macroscopic failure mode of ZnO varistors after multiple lightning impulses involved the rapid deterioration of the electrical parameters with the increase of the number of impulse groups, until destruction occurred by side-corner cracking. The microstructural examination indicated that, after the multiple lightning strokes, the proportion of Bi in the crystal phases was altered, the grain size of the ZnO varistors became smaller, and the white intergranular phase (Bi-rich grain boundary layer) increased significantly. The failure mechanism was thermal damage and grain boundary structure damage caused by temperature gradient thermal stress, generated by multiple lightning currents.

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Ageing of metal oxide varistors due to surges

Cited by 20 publications

References 3 publications

Optimised PLC power transfer on avionic DC Power Lines: Coupling circuit and lightning protection

Optimised PLC power transfer on avionic DC Power Lines: Coupling circuit and lightning protection

A Low-Cost Surge Current Detection Sensor with Predictive Lifetime Display Function for Maintenance of Surge Protective Devices

An Experimental Study of the Failure Mode of ZnO Varistors Under Multiple Lightning Strokes

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