Dan is currently IAC Cable Installation Engineer Nordsee Cluster for Nordsee Two GmbH
Today, we welcome Dan Croft onto our Jointers Blog to demonstrate the skill level and competency required to terminate 33kV cables into gas insulated switchgear manufactured by Siemens using Euromold Connectors.
The medium voltage power cable manufactured by Prysmian is expertly prepared by the 33kV Competent Cable Jointer using precision engineered and professional cable jointing tools – the 33kV Prysmian cable was stripped and prepared using the following;
Cable Jointing Tools
Nexans EXPERT MV Cable Jointers Tool Kits
Daniel explains the Euromold connector installation, “the 33kV copper earth screen is bonded to the outer sheath so a window needs to be taken out with Kevlar string, a bit of heat and a tool such as a flat head screwdriver. Used very carefully and precisely in order to remove the window without damaging the screen underneath. Also, all MV cable preparation work such as stripping of bonded screen and XLPE insulation removal must be conducted to the highest possible standard – this includes sanding and polishing of the XLPE insulation layer to ensure there is a “super smooth” and unblemished surface. This is achieved by the cable jointer using precision shaving techniques then sanding (with 240,320 and 400 grit sandpaper sheets). Finally, the 33kV cable insulation is polished with super fine paper and carefully heated creating a surface as smooth as glass. The 33kV cable is then ready to terminate using the Euromold connector type dependent upon the medium or high voltage equipment Bushing Interface type.”
ā” Euromold connectors are available in Interface A-F specifications to terminate MV-HV cables into switchgear, transformers and substations including up to 66kV connections.
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33kV Cable Specification. The medium/high voltage power cable specification is 33kV single core XLPE insulation with 240sqmm aluminium conductor and copper tape screen – the semicon screen layer is fully bonded to XLPE. Also the cable sheath has an additional fully bonded semicon layer.Ā The cable sheath has a semi-conductive later bonded to it which needs removing for electrical separation between the copper earth tape and outer sheath.
33kV Connectors. 33kV cables are terminated using Nexans Euromold Connectors and connected into the electrical equipment to create a “touch-safe” screened MV cable termination into the gas insulated switchgear.
Flashguard Installed. Arc free and arc flash protection solution for MV Power Distribution Electrical Equipment – the physical barrier stops the MV-HV connectors or terminations becoming free from the switchgear or transformer bushing in the unlikely event of a fault.
Should you require any assistance with the selection or specification of Prysmian cable joints please do not hesitate to contact us.
T&D distribute the most extensive range of MV & HV Cable Joints & Terminations, Cable Installation Accessories & Cable Pulling Equipment – we service UK and international clients working on underground cables, overhead lines, substation earthing and electrical construction at LV, 11kV, 33kV and EHV transmission and distribution voltages.
LV ā Low Voltage Cable Joints, Glands, Cleats, Lugs & Accessories (1000 Volts)
MV HV ā Medium & High Voltage Cable Joints, Terminations & Connectors (11kV 33kV EHV)
Cable Laying ā Underground Cable Covers, Ducting, Seals & Cable Pulling Equipment
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