Risk assessment of surge current generated by spark discharges on open contacts of small power relays

Chen, Chao-Rong; Chen, Mu-Cheng; Chen, Chun‐Chi

doi:10.1049/iet-gtd.2015.0374

Cited by 2 publications

(9 citation statements)

References 8 publications

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“…The power industry on economic grounds incorporates automation of small hydropower plants, and the same is managed through remote sensing and control application . During this, several small power relay arrangements are inevitably used for controlling purposes.…”

Section: Discharge Assessment In High‐voltage Accessoriesmentioning

confidence: 99%

“…During this, several small power relay arrangements are inevitably used for controlling purposes. In case of damage, exercising the usual inspections is very hard and practically unable to locate the fault . In a period of regular maintenance, if the functional tests of relay are normal, the status of relay contacts are taken for granted as they do not form the main equipment .…”

Section: Discharge Assessment In High‐voltage Accessoriesmentioning

confidence: 99%

“…Considering the material used, it is presumed that the device itself is practically suitable for the application. In particular, the imperfections in the structural design and the positioning of the high‐voltage conductor in a relay switch and micro‐discharges in the cavities of connecting cables cause stronger electrical discharges which in turn compromises the lifetime and reliability of the device itself . In other words, the discharges cause the relay switch and/or the connecting cable to suffer a premature failure.…”

Section: Introductionmentioning

confidence: 99%

“…In other words, the discharges cause the relay switch and/or the connecting cable to suffer a premature failure. It is reported that under practical conditions, it is very hard, if not practically difficult to locate the faulty relay switch in a control panel . Under such fault conditions, the pertinent electrical system is mistakenly considered faulty and brought offline .…”

Section: Introductionmentioning

confidence: 99%

“…It is reported that under practical conditions, it is very hard, if not practically difficult to locate the faulty relay switch in a control panel . Under such fault conditions, the pertinent electrical system is mistakenly considered faulty and brought offline . Naturally, it becomes equally important to ensure the reliability of the accessories such as the low‐power relays, connecting cables, and their collective arrangement as an electrical system, well before their underwater commissioning.…”

Section: Introductionmentioning

confidence: 99%

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Understanding partial discharges in low-power relay and silicone cable modified to suit high-voltage requirement of deep sea electrical system

Arumugam

Haba

Koerner³

et al. 2018

Int Trans Electr Energ Syst

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Modern trend in the ocean engineering sector focuses on improvising the existing technology and enhancing the cost-cutting measures to meet the economic constraints. In addition, the safety and reliability of the applied technique must be increased. A possible way to achieve this is by suitably modifying the existing low-cost devices to meet the requirements of underwater application. At any cost, the reliability of such modified devices has to be ensured well before their underwater deployment. Currently, the most attention is provided to the high-power apparatus such as submarine power cables, structural components, etc., while the reliability of the other supporting components, ie, high-voltage relay switches and connecting cables, is provided with scanty attention or at least, the sensitive data are not made available in the public domain. Considering this, an experimental investigation on understanding the reliability of a standard high-voltage relay switch and its high-voltage connecting cable, modified to suit the requirement of 20 kV deep-sea switching application, is initiated. The reliability of the chosen components is assessed through partial discharge measurements. First, a high-voltage relay and connecting cable are selected and suitably modified to meet the underwater condition. Later, the chosen samples are emulated at underwater conditions and subjected to conventional and non-conventional partial discharge test methods. Depending on the level of discharge, the modification made on the standard relay and connecting cable, is validated and subsequently deployed in an underwater application.

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Section: Discharge Assessment In High‐voltage Accessoriesmentioning

confidence: 99%

Section: Discharge Assessment In High‐voltage Accessoriesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Understanding partial discharges in low-power relay and silicone cable modified to suit high-voltage requirement of deep sea electrical system

Arumugam

Haba

Koerner³

et al. 2018

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

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Arcing failure analysis of miniature circuit breaker using nano-W–Cu material

XiongDezhi

ChenXiangqun

YangJie

et al. 2018

Emerging Materials Research

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In order to solve the problem of frequent failures of miniature circuit breakers and the resulting short arcing, research on nano-tungsten–copper (nano-W–Cu) material in arcing failure analysis of miniature circuit breakers was carried out by the authors. Ordinary pure copper material, which is widely used in electrical power distribution, exhibits major limitations such as low melting point and metal vapor, which causes frequent failure of the miniature circuit breaker. In this way, on the basis of analyzing the mechanism of miniature circuit breaker arcing and using nano-tungsten–copper material, this paper makes provisions for the 10 kA tolerance test process and conditions of short-circuit current and extracts the commonly used test for a certain type of miniature circuit breaker combined with nano-tungsten–copper material. The test results show that miniature circuit breaker arcing can be reduced by using nano-tungsten–copper material to replace the ordinary pure copper alloy. This could significantly enhance the performance of miniature breaker arcing and its breaking capacity and reduce the miniature circuit breaker arc time as well as the breaking time, which could effectively improve the reliability, security and stability of miniature circuit breakers and effectively solve the problem of miniature circuit breaker arcing failure.

show abstract

Risk assessment of surge current generated by spark discharges on open contacts of small power relays

Cited by 2 publications

References 8 publications

Understanding partial discharges in low-power relay and silicone cable modified to suit high-voltage requirement of deep sea electrical system

Understanding partial discharges in low-power relay and silicone cable modified to suit high-voltage requirement of deep sea electrical system

Arcing failure analysis of miniature circuit breaker using nano-W–Cu material

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