Blog

Removal of Graphite Coating from Semicon on Medium Voltage Power Cables

Technical Note Contribution by 

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 MV 

SEB CD980S Extendable Cable Drum Trailer

CD980s Extendable Cable Drum Trailer

Cable Drum Trailer

CD980S

SEB CD980S is a cable drum trailer suitable for use “off road” with the ability to handle up to 5000mm diameter cable drums – cable drum trailers ensure safe loading, transportation and laying of LV, MV, HV & EHV cable from drums into a cable trench with a payload up to 48,000Kgs.

CD980s extendable cable drum trailer capable of off loading and carrying 50T Drums of cable. The SEB CD980S trailer concept and design which was a joint initiative between the Energy Ops Teams and Magnor Plant, Morgan Sindall’s in-house Plant Business.

The cable drum trailer successfully off loaded a 45T drum, one of 109 drums required to complete the project.

The cable trailer design has removed the need for cranes on site, no lift plans, no spindles for the trailers, all in all a much safer and cost-effective way of off loading and transporting large drums of medium and high voltage power cable.

It was three years in the design and making but a great result and real game changer for the industry, another first for Morgan Sindall.

SEB

T&D distribute the complete range of LV-HV Cable Pulling and Laying Equipment including cable rollers, cable socks, drum jacks, drum trailers, cable lubricant, underground cable protection and conduit duct rod.

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 MV 

Subsea Power Cables For North Sea Link Interconnector Project

Subsea Power Cables

North Sea Link Interconnector Project

This is the first Blog in a series by Nexans explaining how their subsea solutions are helping to meet global demand.

The North Sea Link Interconnector project is a huge and ambitious project that involves cooperation, innovation, engineering, and lots of planning. This summer, Nexans began the major installation operations in Western Norway.

The Nexans’ land high voltage cables arrived for the North Sea Link project in Halden.

Nexans have been awarded a turnkey project covering 2x250km of 525kV HVDC subsea and land cables.

This interconnector link will be the longest subsea electricity link in the world. In the below video the five high voltage cables will be installed at the Kvilldal converter station.

Due to the logistics of this complex project the land cables must be transported first.

The vessel will now travel to the town of Sand in the western part of Norway to unload the cables.

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 cable 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 MV 

155kV NKT GIS Cable Termination

Image Courtesy of: Richie Rice (EHV Cable Jointer)

Pictured Below: 155kV NKT GIS Cable Termination

155kV NKT GIS Cable Termination

NKT Cables

NKT has a broad portfolio of low-pressure oil cable sets up to 170kV: from through and stop sockets to end closures and transition sleeves for connection to modern VPE technology.

For the quality and safe installation of NKT cable sets a wide range of Jointer Training is provided so that utilities can continue to operate oil cable systems cost-effectively. In addition, NKT supports clients in setting up a local reserve warehouse to ensure rapid availability of high voltage cable joints and cable terminations.

Renew, rebuild and repair of high voltage low pressure oil filled cables with NKT.

NKT CABLE JOINTS & TERMINATIONS OVERVIEW

• Outdoor cable terminations (porcelain or composite)
• Non-self-supporting outdoor cable terminations
• Cable terminations for gas-insulated switchgears (GIS)
• Transformer cable terminations
• Straight-through cable joints
• Insulating joints/cross-bonding cable joints
• Transition cable joints, XLPE-insulated/oil-filled cables
• CabSnap accessories for pre-assembled cable connection systems

Jointers blog

Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.

Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.

15,000+ Subscribers. ➡

“Nuts, Nipples & Oil Jobs”

Image Courtesy 

Jimmy Nicklin

(Jointer 11kV-420kV)

Oil nipple fitted, lead painted and pressurised.

Jointers blog

Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.

Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.

15,000+ Subscribers. ➡