HV and EHV Cable usage Grows

Extruded high voltage (HV) and extra high voltage (EHV) dielectric cables are an important factor in HV transmission and their usage is growing around the world. Because the insulation is made from specially designed polyethylene, these cables have very low dielectric losses. And, because they are crosslinked, they have excellent thermal and mechanical aging characteristics and higher permissible operating temperatures than paper-oil cables.

Though HV/EHV cables are composed of numerous layers, areas of key consideration for electrical performance are the insulation and the semiconductive shields used in the cable core. The insulation must be sufficiently clean to afford excellent electrical properties for the cable such as dissipation factor and breakdown strength. The shields must be sufficiently smooth and clean to provide adequate electrical stress protection.

Superclean insulation products HFDB-4201 SC, HFDK-4201 SC, HFDB-4300 SC and HFDJ-4201 SC from Dow Wire & Cable are manufactured to the most stringent cleanliness requirements. Similarly, supersmooth semiconductive shield compounds HFDA-0800, HFDA-0801, HFDA-0802 and NUCV-9653 have the exceptional smoothness needed for the HV and EHV applications. Dow Wire & Cable is working with key testing institutes and customers with selected EHV grades of the HFDK-4201, HFDB-4300 and HFDA-0801 product lines for specific EHV cable projects. Dow Wire & Cable also offers a variety of polyethylene insulating and semiconductive jacket products for use in HV/EHV cables.

Our compounds for HV/EVH applications are produced in leading, state-of-the-art compounding facilities in USA, Germany and Japan and are globally recognized and widely used. For detailed information about the Dow Wire & Cable products available for your application and region, please visit our web site, www.dowwireandcable.com.