An experimental approach to melting of aluminum-alloy string at an arc spot formed by surging current.

Kito, Yukio; Mizuno, Tamotu

doi:10.1541/ieejpes1972.108.577

Cited by 9 publications

(9 citation statements)

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“…: changes depending on the electrode polarity are as follows [9] • In the case of a cathode • In the case of an anode (4) where and are the cathode-fall and the anode-fall voltages, respectively;…”

Section: ) Heat Due To Electronsmentioning

confidence: 99%

“…is given by the following equation, in which Bolzmann's constant and the value of electronic charge are considered [9] (5)…”

Section: ) Heat Due To Electronsmentioning

confidence: 99%

“…In this case, Nu varies depending on gap length and the diameter of the counter electrode, and is expressed as the following equation [16] using the Prandtl number (Pr) and the Reynolds number (Re). In the case of (9) where C is as follows.…”

Section: ) Heat Due To Electronsmentioning

confidence: 99%

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Development of a Method of Calculating the Melting Characteristics of OPGW Strands Due to DC Arc Simulating Lightning Strike

Iwata

Ohtaka

Kuzuma

et al. 2013

IEEE Trans. Power Delivery

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Some strands of composite fiber-optic ground wire (OPGW) are sometimes melted and broken by high-energy lightning strikes. DC arc tests simulating lightning strikes have been performed to obtain the melting and breaking characteristics of OPGW strands. The tests have to be performed under many conditions concerning the arc (e.g., current, duration, polarity, gap length) and the OPGW (e.g., size, type, and number of strands) to clarify the melting and breaking characteristics of the strands. In this paper, the calculations regarding the melting characteristics of strands are performed considering the transferred heat and its area from the arc to the strands under the aforementioned conditions. The melting characteristics of strands are calculated with an arc current of 1-100 kA considering the measured current of actual lightning. The calculation results of the strand melting duration depending on arc current show good agreement with the experimental values obtained in dc arc tests.

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Section: ) Heat Due To Electronsmentioning

confidence: 99%

“…is given by the following equation, in which Bolzmann's constant and the value of electronic charge are considered [9] (5)…”

Section: ) Heat Due To Electronsmentioning

confidence: 99%

See 1 more Smart Citation

Development of a Method of Calculating the Melting Characteristics of OPGW Strands Due to DC Arc Simulating Lightning Strike

Iwata

Ohtaka

Kuzuma

et al. 2013

IEEE Trans. Power Delivery

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“…These T agreed well with those for the long arc column of 15mm. However Va seems to be lower than Vc [5,6,22]. In fact,…”

Section: <42> Arc Temperature and Its Diameter Thementioning

confidence: 99%

“…Introduction SF6 gas insulated switchgears(GIS) are widely used as important power equipment to supply electric energy to modern society. Faults in the metalclad systems can lead Much effort has been so far spent to measure the voltage drop in the electrode fall region [2][3][4][5][6][7][8] We successively adjusted gap length "L" between the electrodes to be 0.2, 0.5, 1 and 3 mm at a given current. At each L, an arc voltage was measured.…”

mentioning

confidence: 99%

Total Voltage Drops in Electrode Fall Regions of SF6 Arcs between Electrodes of Cu-W, Cu, Fe, Ti, C and W in Current Range from 10 to 20000A

et al. 1996

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Measurements were made of the sum of cathode-fall and anode-fall voltages, i.e. electrode fall voltage Vfa11 for SF6 arc at a pressure of 0.1 MPa in wide current range from 10 to 20000A. The SF6 arc was burned between electrodes of copper-tungsten, copper, iron, titanium, carbon and tungsten. For each electrode, Vfall at a given current was estimated as arc voltage at zero gap length between the electrodes, which was extrapolated from arc voltages measured in short gaps with various lengths below 3mm. The electrode fall voltage Vfall proved to be 17.5, 17.5, 17.5, 17.3, 15.2 and 13.8V for the Cu-W, Cu, Fe, Ti, C and W electrodes, respectively. The electrode fall voltage VfaIl was affected by the electrode material. It was also found that the electrode fall voltage at a given electrode was independent of current in the above range.

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Calculation of melting/breaking of GW and OPGW strands struck by DC arc discharge simulating high energy lightning

Iwata

Ohtaka

Goda

2014

Electric Power Systems Research

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An experimental approach to melting of aluminum-alloy string at an arc spot formed by surging current.

Cited by 9 publications

References 0 publications

Development of a Method of Calculating the Melting Characteristics of OPGW Strands Due to DC Arc Simulating Lightning Strike

Development of a Method of Calculating the Melting Characteristics of OPGW Strands Due to DC Arc Simulating Lightning Strike

Total Voltage Drops in Electrode Fall Regions of SF6 Arcs between Electrodes of Cu-W, Cu, Fe, Ti, C and W in Current Range from 10 to 20000A

Calculation of melting/breaking of GW and OPGW strands struck by DC arc discharge simulating high energy lightning

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