Strand-fll sometimes called moisture-block is a tar like substance that is applied between each lay-er of a concentric stranded copper or aluminum phase conductor. During the stranding process and at slightly elevated temperatures this tar like substance becomes fuid enough to be forced through a pump and applied geometrically in such a manner that the interstitial space between every strand is flled with the tar. The tar is then allowed to cool whereas it becomes stable and remains in place.
A dual rated cable is a cable that lists two different voltage ratings on its jacket. For instance, a cable with 115 mils insulation thickness may have a jacket with a print legend that lists both 5kV and 8kV voltages at 133% and 100% insulation levels respectively on it. Therefore, this cable may be used on both 5kV and 8kV systems.
The objective of this procedure is to provide a means of repairing jacket gouges, tears or indents in low and medium voltage cables. The purpose of the jacket is to protect the underlying elec- trical components from physical and environmental damage. The jacket is not part of the cable’s electrical system and therefore serves no dielectric purpose. Repairs should only be performed by quali ed personal.
Southwire is a company with a keen environmental awareness. We seek to leave the lightest footprint possible on the environment in the course of manufacturing and delivering our products to market. To that end Southwire Company has innovated a product that accomplishes one of our environmental objectives – A medium and 600 volt Ethylene Propylene Rubber (EPR) insulation that contains no lead.
Insulation resistance testing is a non-destructive test procedure. The test measures the insulation resistance between the phases and/or between phase and ground. It is commonly used in the industry for acceptance testing prior to energizing the cable and for maintenance testing programs.
A variable-frequency drive (VFD) cable is a special cable construction for the inverter-to-motor cable that has some or all of the following attributes:
• An overall shield that keeps bad stuff such as electrical magnetic interference (EMI) from escaping.
• A robust insulation system that keeps good stuff such as voltage and current from escaping.
• A symmetrical design that reduces the amount of bad stuff in the cable, such as common mode current and EMI.