SEMI CONDUCTING COMPOUND FOR MV/HV CABLES
The wavy surface of stranded conductor increases electrical stress level at the crest point of the wire. This stress value increases with the increase in operating temperature. To limit the stress value we make stranded conductor smooth by compacting. It is to be noted that any imperfection in conductor surface will develop electrical stress which will cause failure of cable over the time. To avoid such failure, we use semi conducting layer of thin thickness over conductor surface. Similarly a think thickness layer of semi conducting material is also used on XLPE insulation which helps in distributing the electrical stress perpendicular to the axis of cable core. This process is quiet critical as any imperfection at any point on conductor layer (Semi conducting material on conductor) and Insulation layer ( Semi conducting layer on XLPE) will develop high stress at that point initiating failure with time.
In order to make semi conducting compound, a high quality carbon black having smooth and fine particles are used. Nowadays, two type of carbon black is being manufactured. First type is manufactured in furnace by burning the mineral oil, while the second type is being processed by controlled prolysis of acetylene to produce acetylene black.
Al-Noor Global Trading
4 年Greetings from Al-Noor Global Trading Kindly find the attached BCSL International Tender Document for Different 21 Item as below, 1.Virgin Black Polyethylene Granules (MDPE) for Outer Jacket of OFC 150,000KG 2. Virgin Black Polyethylene Granules (HDPE)for Outer Jacket of OFC 10,000KG 3.Galvanized Steel Rope ( 7x0.8mm)15,000KG 4.Coloured Optical Fiber (Single Mode G652D)- Different Color 1,80,000KM 5. FRP Rod (0.8mm & 2.2mm) 5000Km 6. PBT Granules for Loose Tube, Natural Color Virgin Material 40,000KG 7. OFC Core Filling Compound 10,000KG 8. Polyester Binder Yarn 3,000Kg 9.Co-Polymer Coated Aluminium Tape, Slitted Sizes for OFC 35,000KG 10. Water Blocking Tape(Different Size) for OFC 11,000KG 11. Co-Polymer Coated Steel Tape,Slitted Sizes for OFC 120,000KG 12.Virgin HDPE Granules, Natural Color (Pipe Grade) 70,000KG 13. Silicon Master Batch 5,000KG 14. HDPE Color Master Batch(White) 1,000 KG 15. Copper Wire(8mm Dia) 120,000KG 16.Aluminium Wire/Rod 9.5mm Dia 180,000KG 17. Galvanized Steel Wire Core (Different Size) 100,000KG 18.PVC Compound, Black Colour 150,000KG 19. PVC Compound (Different Color Exc Aminul Islam Al-Noor E-mail : [email protected] [email protected]
Guangdong Senyang Wire&Cable Materials Technology Co., Ltd. - Manager
4 年semi-conductive buffer water blocking tape can be used for water blocking and bedding under the metal layer. And semi-conductive nylon tape have good tensile strength and elongation.