Why trefoil cable arrangement

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Clearly cleating cables is essential, as is effective sealing of cable ducts to prevent flood damage to substations and buildings or the spread of potentially flammable gases. Triplex cables are characterised by the appearance of 3 core cables twisted around each other. The hexagons separating the pictured 11kV cables must have the smaller hexagonal tubes nested in the large one to create additional strength.

Where the cable ducts are located in a designated hazardous area according to the ATEX Directive we can provide expert advice and product recommendations for sealing cables in potentially explosive atmospheres.

View product. By entering your details you give consent to receive free courses and tutorials through email. Academic Editor: Dragan Poljak. Received 31 Oct Accepted 07 Feb Published 25 Feb Abstract Trefoil buried cable is one of the important cable arrangements for the underground transmission line, and its heat transfer performance is relatively poor. Introduction As global economics increases, the demand for electricity supply increases rapidly [ 1 ].

Methodology 2. Model and Geometric Parameters The model of trefoil buried cables with fluidized thermal backfill material FTB is presented in Figure 1. Figure 1. Model for FTB trefoil buried cables. Table 1. Figure 2. Power cables in trefoil arrangement and cable structure. Table 2. Figure 3. Variations of and with temperature. Table 3. Figure 4. Typical computational mesh for parabolic-type FTB trefoil buried cables.

Table 4. Figure 5. Figure 6. Figure 7. Figure 8. Variations of the maximum cable core temperature in the trefoil buried cables with NS and flat-type FTB. Table 5. Figure 9. Figure The geometric parameters of parabolic-type FTB trefoil buried cables. Samples [m] [m] [m] [m 2 ] [K] 1 0. Table 6. Table 7. Table 8. References J. Wang, J. Zhang, and J. Aras, C. Oysu, and G. View at: Google Scholar I. Metwally, A.

Al-Badi, and A. Cisek, D. Taler, M. Pilarczyk, and T. Gouda, A. El Dein, G. Amer et al. Cisek, M. Pilarczyk, and D. Gouda and A. Rerak and P. Anders and H. Rerak et al. Cichy, B. Sakowicz, and M. Bittelli, P. Cisek et al. Quan, C. Fu, W. Si et al. View at: Google Scholar P. Taler, P. Cisek, and M. Bu, J. Yang, M. Zhou et al. Shi, T.

Ma, W.