Fire behaviour of electrical cables in cone calorimeter: Influence of cables structure and layout

Magalie, Carcillo; Caro, Anne-Sophie; Rodolphe, Sonnier; Ferry, Laurent; Gesta, Emmanuelle; Lagrève, Christian

doi:10.1016/j.firesaf.2018.05.001

Cited by 39 publications

(17 citation statements)

References 31 publications

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“…In fact, the heat transfer is closely related with heat release rate. Magalie et al [31] conducted cone calorimeter experiment to investigate the correlation between the number of closely arranged cables and the maximum heat release rate, and proposed a prediction formula: 1.14 (9) In addition, Magalie et al compared the predicted results calculated from Formula (9) and the experimental results, verifying the accuracy of the prediction. To achieve the correlation between the number of cables and the maximum heat release rate of each cable, Formula (10) is proposed in this work.…”

Section: Flame-spread Ratementioning

confidence: 96%

Experimental Study on Flammability and Flame Spread Characteristics of Polyvinyl Chloride (PVC) Cable

Tang

Liang

et al. 2020

Polymers

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Polyvinyl chloride (PVC) is widely applied in cables as insulation materials, which are vital for operation and control of industrial processes. However, PVC cables fires frequently occur, arousing public concern. Therefore, experimental methods are used to study flammability and flame-spread characteristics of PVC cable in this paper. Influences of cable structure and number are investigated, which is scanty in previous works. As cable core number of single cable or cable number of multiple cables rises, average flame height and width increase while the increment decreases. Formulas concerning dimensionless flame height and single cable diameter (or total width of multiple cables) are obtained. The former is negatively correlated with the latter. For single cable, convective heat transfer is dominant, and flame-spread rate decreases as cable core number increases. Cable maximum temperature, which drops first and then rises as cable core number increases, is observed in the cable core area. For multiple cable, the flame-spread rate increases as cable number increases. As the cable number rises, the length of pyrolysis and combustion zone increases while the maximum temperature of cable surface decreases. This work is beneficial to fire hazard evaluation and safety design of PVC cables.

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Section: Flame-spread Ratementioning

confidence: 96%

Experimental Study on Flammability and Flame Spread Characteristics of Polyvinyl Chloride (PVC) Cable

Tang

Liang

et al. 2020

Polymers

View full text Add to dashboard Cite

show abstract

“…A fire source is essential in experimental simulation. As far as we know, there are mainly four types of fire sources, including gas burner [3][4][5][6][7][8][9][10], heat radiation fire source [11][12][13][14][15][16][17][18][19][20][21], Electric heating fire source [22], and Oil pan fire source [23,24]. Although these fire sources could ignite the power cable, they could not simulate the ignition of cable fire by arc discharge.…”

Section: Introductionmentioning

confidence: 99%

Influence of Arc Size on the Ignition and Flame Propagation of Cable Fire

Chen

Zhang

et al. 2021

Energies

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Cable fire caused by arc faults is one of the essential factors threatening the safe operation of a power system. The ignition and flame propagation of cable fire dependent on the characteristics of the arc discharge is lackingin in-depth understanding at present. In this work, with the constant electric power deposited into the arc discharge, the effects of arc size on the ignition and flame propagation of 110 kV XLPE cable fire are investigated for the first time. The arc size is changed by varying the gap distance of electrodes from 1.5 cm to 2.5 cm. It is interesting to find that the larger the arc size is, the faster the cable fire is ignited and propagates, and the larger the damaged area of the sheath of the cable is. Therein, when the gap distance increases from 1.3 cm to 3.1 cm, the equivalent impedance and the length of the arc discharge increase nearly seven times and three times, respectively. However, the gas temperature of the arc decreases slightly from 2280 K to 2100 K. In addition, a 3D model of the cable fire ignited by arc discharge is computed by Pyrosim software with fire dynamic simulation (FDS) module. Simulated results show that as the arc size increases, the cable fire is ignited faster, the flame propagates both vertically and horizontally increasing significantly, which is agreed well with the experimental results. This study deepens the understanding of the cable fire ignited by arc discharge and therefore it is useful for the evaluation and prevention of cable fire.

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“…In addition, the influence of the external heat flux and the spacing of cables on the cable fire characteristics was also investigated.18-20 Martinka et al18 investigated the fire risk of electrical cables by considering the influence of mutual spacing between the cables and the thermal conductivity of the material under the cables. Magalie et al 19 found that the number of cables and spacing of cables had an effect on the first peak heat release rate and the delay between time to ignition and the second peak heat release rate. Meinier et al20 studied the fire behavior of two halogen-free flame retardant cables used in nuclear power plants (NPPs) using the cone calorimeter.…”

Section: Introductionmentioning

confidence: 99%

Bench-scale experimental study on the fire behavior of electric cable arrays by considering different layouts

Zhou

Chen

Zhang

et al. 2021

Journal of Fire Sciences

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The effect of different cable layouts on the fire behavior of electric cable arrays was experimentally studied. The influence of external heat flux on cable fire characteristics was investigated. Several parameters for electrical cables such as the post-burning morphology, ignition time, heat release rate, peak heat release rate and total heat release were obtained. The results show that cable layouts could affect cable charring degrees according to the post-burning morphology. A linear relationship was found in the transformed form of time to ignition and radiant heat flux, and the critical radiant heat flux value for the single cable array appeared smaller than that for the other two layouts. The peak heat release rate for Cables A–D with the single array presents the increasing trend with an increase in radiant heat flux, while the two parallel and intersectional cable arrays present the different trends. Moreover, the total heat release values of Cables A–D in the different cable layouts were analyzed. This work provides the basic data and preliminary investigation to fire engineering of cable arrays with the different layouts.

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Fire behaviour of electrical cables in cone calorimeter: Influence of cables structure and layout

Cited by 39 publications

References 31 publications

Experimental Study on Flammability and Flame Spread Characteristics of Polyvinyl Chloride (PVC) Cable

Experimental Study on Flammability and Flame Spread Characteristics of Polyvinyl Chloride (PVC) Cable

Influence of Arc Size on the Ignition and Flame Propagation of Cable Fire

Bench-scale experimental study on the fire behavior of electric cable arrays by considering different layouts

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