Dokumen tersebut membahas tentang perbandingan berbagai jenis bahan isolasi yang digunakan pada kabel listrik, seperti kertas, polietilena, polipropilena, dan etilena propilena. Dokumen ini juga menjelaskan struktur kimia dan kelebihan masing-masing bahan isolasi tersebut, seperti daya hantar listrik, kekuatan dielektrik, kemampuan isolasi, serta ketahanan terhadap air dan panas.

1. INSULATING MATERIAL FOR CABLES Presented by Rezon Arif B / L2F008082

18. Moisture vapour transmission rate PVC adalah yang dipakai sebagai jacket meskipun saat ini sudah menggunakan Neoprene(polychloroprene)atau Hypalon(chlorosulphanated poly ethylene) 5.00 1.15 Semicons 10.0 1.30 PVC 0.74 0.92 LLDPE 0.32 0.95 HDPE 0.58 0.94 HDPE 0.51 0.93 MDPE 1.16 0.92 LDPE Moisture vapor transmission rate Density Material

20. Major difference Between Paper and Polyolefinic Insulation Degrades at weak link Thermal degradation via cleavage at weak link Not Crosslinked Not crosslinked Significant thermal expansion No thermal expansion on heating Partially crystalline / varies with grade employed Partially Crystalline / relatively constant Non fibrils Fibrils Chains branched Chains linear Less polar, Low Losses More polar / medium losses Carbon / hidogen / oksigen Carbon/ hidrogen/ oxigen Synthetic Natural Polyethylene Paper /Cellulose

21. Same as XLPE Degrade at weak link Crosslinked Crosslinked Slight thermal expansion Same thermal expansion as PE Least crystalline of all Slightly less crystalline vs PE Non- fibril Non- fibril Chains branched, crosslinked Chains branched, crosslinked Losses due to additive Less polar, low losses Carbon / hydrogen Carbon / hydrogen Synthetic Synthetic Ethylene Propylene Rubber Crosslinked polyethylene