Removal of Graphite Coating from Semicon on Medium Voltage Power Cables
Published 30 Sep 2020
Technical Note Contribution byÂ
Uxio Ramos
Director Técnico de Ventas / Technical Sales Director
BBC Cellpack manufacture cable connection systems and accessories for low and medium voltage power systems. This has given them a unique know-how, covering the entire range from preparation of raw materials, specification of cast resins and gels, creating the formulas for the plastics, to installation and packaging of our cable accessories.
In the photograph below the medium voltage cable end has been stripped and prepared prior to termination – the cable end is showing the different layers and also the graphite coating on the XLPE insulation not removed. Graphite coated semicon layers consist of a paper/cloth layer forming the semicon layer, which is graphite (conductive) coated and this graphite powder remains attached to the cable insulation after paper/cloth removal. The graphite must be cleaned using an approved cable cleaning solution suitable for medium voltage cable insulation ensuring no residues remain.
Cable Preparation & Jointing Tools
Cable jointing tools manufactured by Alroc for the removal and stripping of outer cable sheath, semi conductor screen and insulation from LV, MV, HV and EHV power cables.
Cable screen stripping tools are available to remove bonded semi-conductor screens from MV-HV cables and screen scoring tools available for removing peelable semi-conductor screening from medium/high voltage cables.
Cable preparation is essential to the performance and stability of MV-HV cable joints and terminations – if cables are under prepared using sub-standard tools or basic hand tools then the risk incidence of cable failure is increased.
Alroc tools have been developed in co-operation with world leading manufacturers of Medium, High & Extra High Voltage Cables to ensure their electrical performance is not comprised by poor workmanship and failure to use precision engineered, designed for purpose cable jointing tools.
Alroc | Cable Tools (LV MV HV EHV Cable Jointers Tools)
THORNE & DERRICK
Thorne & Derrick are national distributors of LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – servicing businesses involved in cabling, jointing, substation, earthing, overhead line and electrical construction at LV, 11kV, 33kV, 66kV and EHV. Supplying a complete range of power cable accessories to support the installation and maintenance of low/medium and high voltage power systems:
- Slip-on Cable Terminations
- Cold-shrink Cable Terminations
- Heat-shrink Cable Terminations
- Cable Joints – Heat & Cold-shrink
- Separable Connectors (Euromold)
- Surge Arresters & Switchgear/Transformer Bushings
Key Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MVÂ
