Image: Barrie Gray – Offshore Installation Tech at Fabriom Hoboken Belgium for Siemens.
Pictured: 33kV 4000amp Fully Insulated Duresca Busbar System.
The cables that come from the turbine array strings are routed into the 33kV panelboard.
The medium voltage busbars are connected to the bus section of the board and take the load 33kV to the transformer. The transformer increases the operating voltage to 132kV and sends it to shore along the export cable.
Fully insulated busbars provide connections between medium and high voltage equipment such as generators, switchgear or transformers.
The Duresca busbar system offers a compact and safer solution compared to cable or conventional busduct solutions.
Duresca Busbar System – Benefits
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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.
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uploaded by Chris Dodds – Sales Marketing Manager at Thore & Derrick
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A Jointers Hall of Fame – Curated tweets by ThorneanDerrick
➡ Masterclass : 110kV Cable Termination Using Prysmian Outdoor Sealing Ends
Thorne & Derrick’s POWER Blog is regularly updated with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
➡ View T&D’s brochure – contact our Sales Team with your requirements.
We focus on 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 HV
We provide guidance and technical support for the installation of LV, MV & HV Cable Joints, Terminations, Substation & Electrical Equipment from our Key Suppliers including:
| 3M | CMP | Ellis Patents |
| Nexans Euromold | Elastimold | Pfisterer |
| Prysmian | Alroc | CSD |
| Roxtec | CATU Electrical | Cembre |
| Lucy Zodion | ABB | Emtelle |
With Photo Blog contributions from our social network of utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
JOINT ♦ TERMINATE ♦ CONNECT ♦ GLAND ♦ CLEAT ♦ CRIMP ♦ DUCT ♦ SEAL ♦ REPAIR ♦ CABLE ♦ SPLICE ♦ INSULATE
uploaded by Chris Dodds – Sales Marketing Manager at Thore & Derrick
We are highly privileged and grateful to Andrew Brezovszky (EHV Cable Jointer at Matrix Power Solution Pty Ltd) for contributing again to our PhotoBlog.
Andrew is an international class HV Cable Jointer with over 20 years of experience in an extensive range of HV Joints and Cable Terminations across various countries in Europe, New Zealand and Australia.
The following sequence of site photographs and commentary provided by Andrew details the stages of cable installation, preparation and termination using EHV Outdoor Sealing Ends – work was completed on a normal 8 hour/day basis over 5 days with an additional day to install sheath bonding cables and linkbox.
Cable Specification : 110kv XLPE Taihan Cable with 1600sqmm Milliken copper conductor and corrugated copper sheath.
Outdoor Sealing End (Termination) Manufacturer : Prysmian.
Prysmian |Cable Joints | Terminations | Cleats | Connectors
Getting Started
Temporary cable caps are wiped-on to protect the 110kV cable from moisture.
Getting Cleated
Standing and cleating cables is next.
Scaffolding Erected
The scaffold is built which will house our jointing team for a week. We have a generator to power the site and a mobile aircon to control temperature and humidity.
Here’s a shot from the inside before we start cable jointing.
Straightening Cables
Removing the copper sheath is next and installing the cable heating and straightening blankets. The duration is always as recommended by the high voltage cable manufacturer but it also depends upon cable outside diameters.
Cable straightening is a very important stage of the cable installation prior to preparation and cable termination.
Preparing the aluminium glands so they can be plumbed on. We also ‘preload ‘ them, to shorten the time the cable is under heat stress. This is very important, as the longer plumbing time can cause irreversible damage to the semiconducting layer as well as the cable insulation.
Stripping Off
We strip our EHV cables with Alroc tools and cut the chamfers with glass. Old school, labour intensive, etc., I know. The corrugated sheath is scored circumferentially then pulled off. The semiconductor layer and insulation is peeled off with Alroc stripping tools.
Sand & Polish Cables
This is followed by lots of sanding and polishing. Both manual techniques and machine tooling including orbital sanders and linichers are used to achieve this finish.
It is very important to prepare the conductor properly.
Cable Crimping Preparation
Crimping guide block – the cable crimping sequence is important.
Crimping complete using ram/Milliken style crimping head with basic Ryken hydraulic pump.
Stress control installed. Removing the semi-conducting screen and installing the premoulded cable joint sleeve or sealing end sleeve is a critical stage of jointing 110kV cables.
Taping Time
Jointing tapes are next.
Insulator is lowered onto the cable.
Plumb
Plumbing completed.
Armour tape used to reinforce the wipe and cable sheath.
The insulator is then filled with special silicone oil to a specific level and the top arrangements are installed.
Completed installation of 110kV Prysmian Outdoor Sealing Ends to Taihan Cable.
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. ➡
Images Courtesy of: Morteza Sobhani – Expert of Installation and After Sales Services – HV Sales Engineer at Shahin Mafsal Co.
Pictured: Installation of 12 pieces ESF145KV C45L in Miandoab Petrochemical, Iran.
Using PFISTERER dry-type cable accessories means substations or petrochemical plants, for example, can benefit from maintenance free operation. This range of MV HV Cable Aaccessories are explosion proof, therefore ensuring the safety of operating staff.
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. ➡
Cable Sealing in Hazardous Areas
uploaded by Chris Dodds - Thorne & Derrick Sales | Marketing Manager
Roxtec Ex cable sealing solutions using cable transit systems prevent ignition of explosive atmospheres in hazardous area locations.
Typical applications are Ex e and/or Ex tb rated electrical enclosures such as transformers, motors, generators and junction boxes.
Ex e means increased safety for explosive gas atmospheres, and Ex tb means explosion protection by enclosure for explosive dust atmospheres.
Hazardous Area Zone Classification
Hazardous areas are rated into zones based on the possibility of occurrence of an explosive atmosphere – it is the obligation of the owner or the operator of a facility to ensure that the zone classification is done by authorized personnel.
Hazardous Area Cable Seals
| Highlighted zones = Permitted zones for Roxtec Ex products |
The Roxtec Ex product range includes a wide variety of pipe and cable seals to handle different cable sizes and openings. The sealing products are designed and certified for use in Zone 1 and Zone 2 for gas (including vapour and mists) and Zone 21 and Zone 22 for dust.
Roxtec Ex solutions are tested, approved and certified according to the following standards:
Protecting Substations Against Flooded Ducts
Further Roxtec Reading
Specialist Distributors of Industrial & Hazarodus Area Equipment to provide Power, Heat, Light & Ventilation to the explosive atmospheres and process industries.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access Control
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
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INDUSTRIAL LABEL PRINTING SOLUTIONS When clear, durable and professional identification is required across control panels, cable systems, production facilities and industrial installations, print quality, reliability and ease of use are critical. Cembre industrial label printers are designed to support...
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HIGH VOLTAGE JUNCTION BOXES & ENCLOSURES When high-voltage power distribution and cable termination are required, safety, enclosure integrity and long-term reliability are critical. HV Junction Boxes and Electrical Enclosures manufactured by Abtech are engineered for the safe distribution, cable termination and protection...
