Influence of Arc Discharge on the Surface of a Contact Wire

Hayasaka, Takamasa; Akagi, Hirofumi

doi:10.1541/ieejias.135.327

Cited by 5 publications

(8 citation statements)

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“…Adequacy of the simulations was examined by showing experimental results 5 obtained for 81 A at 1 ms in Figure 8. These experimental results agree in the order of magnitude with calculations for current of 75 A flowing from both sides and from one side, and for current of 100 A flowing from one side.…”

Section: Verification Of Simulationsmentioning

confidence: 99%

“…At pantograph bounce, contact wire, contact strip, and other parts melt because of Joule heat, and a molten bridge occurs. This molten metal bridge then breaks and evaporates to initiate arc discharge 5 . Besides, conditions of bridge breaking (melting, evaporation, scattering) depend on initial state immediately before arc ignition; the following arc state is related to contact wire's erosion and breakage 5 …”

Section: Introductionmentioning

confidence: 99%

“…4 For example, Hayasaka et al explored molten bridge as a physical phenomenon that occurs between contact strip and contact wire prior to disconnection arc discharge. 5 At pantograph bounce, contact wire, contact strip, and other parts melt because of Joule heat, and a molten bridge occurs. This molten metal bridge then breaks and evaporates to initiate arc discharge.…”

Section: Introductionmentioning

confidence: 99%

“…This molten metal bridge then breaks and evaporates to initiate arc discharge. 5 Besides, conditions of bridge breaking (melting, evaporation, scattering) depend on initial state immediately before arc ignition; the following arc state is related to contact wire's erosion and breakage. 5 Those studies deal with complex phenomena that involve solid and gaseous states.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of calculation method for melting amount mass of contact wire caused by melting and evaporation of molten metal bridge and arc generation

Morishita

Maeda

Ren

et al. 2022

Electrical Engineering Japan

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As the mileage of the electric railway increases, the unevenness of the contact wire may separate the contact wire and the contact strip. Simultaneously, a disconnection arc discharge is generated by the molten metal bridge. This causes the contact wire to melt and evaporate causing it to break. A few studies have conducted experiments to prevent the contact wire from disconnecting. Based on the results thus obtained, they presented their hypotheses considering conditions sch as the current and time required for melting and evaporation of molten metal bridge and arc generation. In this study, a calculation method for the melting and disconnection phenomenon of the contact wire. Its mass increased when the currents from both sides of the contact wire were taken into consideration. Therefore, we obtained that the convection and radiation play an improtant role for calculation of the melting amount mass of contact wire.

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Section: Verification Of Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of calculation method for melting amount mass of contact wire caused by melting and evaporation of molten metal bridge and arc generation

Morishita

Maeda

Ren

et al. 2022

Electrical Engineering Japan

Self Cite

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show abstract

“…The contact wire and contact strip are melted by the arc discharge . A decrease in equipment efficiency occurs because of the erosion of the electrode . As a countermeasure, Hayasaka et al .…”

Section: Re‐strike Phenomenon Analysis For DC Circuit Breaker and Elementioning

confidence: 99%

Review of Thermal Plasma Simulation Technique

Tanaka

Fujino

Iwao

2019

IEEJ Transactions Elec Engng

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The thermal plasma is widely used for power applications such as circuit breakers, welding, cutting, material processing, waste treatment, and recycling. Transient and three-dimensional simulations have recently been conducted, assisting in the understanding of physical phenomena through new developments in computers and calculation methods. In this review, a thermal plasma simulation technique is described. Specifically, the modeling of a new type of inductively coupled thermal plasma, a radiation transfer analysis of thermal plasma in a gas circuit breaker, and plasma movement of arc welding, DC circuit breakers, electric trains, vacuum circuit breakers, and surface treatment affected by an electromagnetic force are described.

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Numerical simulation of external magnetic field effect on arc plasma after molten metal bridge breaking under different electrode opening velocities

et al. 2022

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In this study, a three-dimensional electromagnetic thermal fluid simulation program was developed to simulate arc movement numerically while considering metal vapor generated from a molten metal bridge along with an electrode opening under external magnetic field application. The change in the physical properties of the arc and the increment rate of the arc voltage per unit length under different electrode opening velocities were analyzed by applying an external magnetic field with different intensities. It was found that the current path of the arc became dispersed when the electrode opening velocity was high because the metal vapor generated from the molten metal bridge remained dominant and highly concentrated. Before the completion of the electrode opening process, the difference in the increment rate of the arc voltage per unit length at different electrode opening velocities became more significant when an external magnetic field was applied. This was because under high and low electrode opening velocities, the cross-sectional area of the arc became narrow and broad, respectively.

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Influence of Arc Discharge on the Surface of a Contact Wire

Cited by 5 publications

References 0 publications

Development of calculation method for melting amount mass of contact wire caused by melting and evaporation of molten metal bridge and arc generation

Development of calculation method for melting amount mass of contact wire caused by melting and evaporation of molten metal bridge and arc generation

Review of Thermal Plasma Simulation Technique

Numerical simulation of external magnetic field effect on arc plasma after molten metal bridge breaking under different electrode opening velocities

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