Blog
275kV Overhead Line Construction Using L8 (S) Towers & Rubus Conductor – Wood
May 13th, 2021Picture Courtesy of: Jonathan Turner (Senior Construction Manager DNO Projects at Wood).
Wood designs, delivers and maintains strategic and complex assets for its customers across the global energy and related sectors.
“Pictured below is a new build line of 46no L8(S) Towers to a new design, carrying twin Rubus conductor with a Keziah 36 fibre earthwire. The project is constructed for 400kV but will run at 275kV – the overhead line will be the main feed for the South West Scotland (SWS) strengthening works,” Jonathan informs.
Overhead Line Electrification Equipment Providers:
- Overhead Towers – Had-Fab
- Conductor & Earthwires – Lumpi
- Insulators – Sediver
- Overhead Line Fittings – Mosdorfer
- Earthwire Chairs – Tesmec
Wood have self delivered access works, foundation installation, erection and wiring, the contract has been underway for 2 years and is due for completion this month.
Installing Bird Flight Diverters Using Single Wheel Earthwire Chair
Last Towers Up & Ready To Be Wired On WA Route
Jointers blog
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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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ProGARM Arc Flash Clothing & Accessories Resource Centre
May 12th, 2021
Main UK Distributors
Resource Centre | Education & Learning with ProGarm
Thorne & Derrick provide competitive prices and fast delivery for the complete range of ProGarm arc flash clothing and accessories designed to protect people and save lives.
ProGarm offer a wide range of mens and womens arc flash garments providing comfortable protection to our clients in the LV HV Electrical Power & Substation sectors of the onshore and offshore renewable, rail, utility, data-centre and energy storage sectors.
Polo Shirts | | Coveralls | | Sweatshirts | Helmets | Insulating Gloves
A Selection of our Top Arc Flash Blogs
See our collection of the Top Arc Flash Blogs featuring the complete range of ProGARM clothing & workwear alongside best practices for protecting your workforce against arc flash and saving lives:
- Latest Arc Flash Legislation & Regulation Explained By ProGARM
- Arc Flash PPE Safety | Guidance On Protecting UK Rail Contractors
- Arc Flash | Customer Testimonial | Utility Cable Ploughing
- Arc Flash Clothing Saves Lives | Watch Eddies Story
- IEC 61482-2 | Arc Flash Standards For Protective Clothing
- Arc Flash Protection | A Whitepaper on Clothing & Garment Selection
- Arc Flash PPE | 7 Top Considerations
- Can Arc Clothing Save Utility Workers Lives?
- Arc Flash Protection Hoodie with FR Protection | ProGARM 5530
- New Arc Flash Coveralls from Protection Specialists ProGARM
- Arc Flash Garments & Protection For Safe Windfarm & Wind Turbine Working
- Arc Gloves | New Arc Flash Dexterity Gloves From Protection Specialists ProGARM
- The Definitive Guide To Arc Flash By ProGARM
- NEW | Arc Flash Hoods From Protection Specialists ProGARM
- Arc Clothing Ranges | New ProGARM Lightweight Arc Flash Protection Garments
- The Material Difference | Inherent v Treated Fabrics for Arc Flash Clothing & Protection
- Avoiding Danger From Underground Services | An HSE Document
- NEW PRODUCT LAUNCH | RIS-3279-TOM Tested Arc Flash Coveralls (Hi-Vis Orange) | ProGARM 4693
- The Arc Flash Risk in Electric Metering
- Arc Flash Garments & Clothing | The Top 10 Sellers
- Arc Flash Survivor Story – Jason Brozen
- Arc Flash Kit | Making Your Electrical PPE Work Even Harder
- Arc Clothing & Flame Resistant Clothing – What Is The Difference?
- Electrical PPE | When Will ProGARM’s Electrical PPE Gain UKCA & CE Certification?
- How Important Are Wearer Trials When Buying Arc Flash PPE?
- RIS-3279-TOM | The Orange Range of Arc Flash Clothing & Standard Overview
- Arc Flash | Don’t Let the Summer Sun Compromise Your Electrical PPE
- The Hidden Risks of Breaking Ground | Protecting Against Arc Flash
- Arc Flash Risks In The Rail Industry
- Arc Flash Safety Awareness Campaign | Service Cable Strikes – Internal Safety Training Video
- Arc Workwear Saves Lives | Watch Mitchell’s Story
- Arc Flash – The Definite Guide to Protecting Lives
- Arc Flash Clothing – PPE To Protect Highways, Street Lighting & Utility Contractors
- Arc Flash The Basics
- IEC 61482-2 2018 – Get Up To Speed With The New Arc Flash Standard
- Arc Flash Resistant Clothing Ranges | New ProGARM Lightweight Arc Flash Protection Garments
- Arc Flash | Risk Reduction by Using Arc Flash Gloves
- Arc Flash Study: Is It A Legal Requirement?
- Overhead Lines | Preventable & Fatal Risks of Electrocution & Arc Flash Incidents
- Arc Flash – The Electrician’s Insidious Companion
- Introduction To Arc Flash
- Overcoming Arc Flash Hazards
- Do Insulating Gloves Provide Arc Flash Protection?
- Arc Flash Calculation – Selecting Clothing & PPE To Protect Lives Against Arc Hazard
- 5 Arc Flash Risks for Solar Industry Personnel
Arc Flash Learning & Resources
Thorne and Derrick are proud to be distributors of ProGARM arc flash coveralls and protection.
We can help – should you require arc flash calculators or advice on the type of clothing and protection available please do not hesitate to contact us.
11kV South Wales Switchgear Board Overhauled By Lucy Electric
May 11th, 2021
Image Courtesy: Joe Nihill TMIET – Network Operations Director at Cophill Power Engineering Ltd
lucy electric
Lucy Electric is a leader in secondary power distribution solutions with over 100 years’ industry experience. Specialising in high-performance medium voltage switchgear for utility, industrial and commercial applications, we enable the safe and reliable distribution of energy to homes and businesses worldwide.
The photos above are from an out of hours maintenance visit by Joe Nihill. For this particular maintenance the scope of works included a fully intrusive overhaul of a 11kV South Wales switchgear board consisting of South Wales switchgear C4X Oil Circuit Breakers (OCB) electrical insulating oil, replacement of each breakers electromechanical protection relay testing and a transfer of operational control document.
This allowed Joe and his team to control an isolated part of the customers network safely for the duration of the works.
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. ➡
Ensto Cold Shrink MV Substation Cable Termination (24kV XLPE Single Core)
May 11th, 2021Image Courtesy of: Morteza Sobhani – Expert Technical Support & Installation High Voltage & Medium Voltage HV MV Products
Pictured: Ensto Cold Shrink MV Substation Cable Termination (24kV XLPE Single Core)
Ensto Cold Shrink (MV HV Indoor Termination)
Cable stripping dimensions should be carefully observed by the MV cable jointers and the correct cable jointing tools used to remove sheath, insulation and semi-conductive screens.
Andy O’Malley commented “Nice clean tidy work area – silicone tape applied at the bottom of the cold shrink termination.”
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. ➡
Cable Terminations & Minimum Air Clearances for Bushings
May 11th, 2021
- Check the cable box for minimum clearances and refer to table 1 below.
- If actual dimension ‘A’ and ‘B’ is less than the value given, a bushing boot must be fitted.
| Table 1 – Minimum Air Clearances for Terminations in Cable Boxes in Accordance with BS 164 Class A. | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Air Clearance Between Live Metal ‘A’ (mm) | 90 | 127 | 242 | 356 |
| Minimum Air Clearance Between Live Metal and Earth ‘B’ (mm) | 65 | 75 | 140 | 222 |
| Table 2 – Minimum Air Clearances for Terminations in Cable Boxes in Accordance with BS 164 Class A. with Bushing Boots Fitted | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Air Clearance Between Live Metal ‘A’ (mm) | 45 | 75 | 100 | 125 |
| Minimum Air Clearance Between Live Metal and Earth ‘B’ (mm) | 32 | 60 | 75 | 100 |
| Table 3 – Minimum Clearance Between Cores and Between Cores and Earth | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Clearance ‘C’ (mm) Measured From top of Stress Tubes | 15 | 20 | 40 | 50 |
| Table 4 – Minimum Clearance Between top of The Stress Control Tubing and Base of the Cable Lug. | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Clearance ‘D’ (mm) | 30 | 50 | 95 | 250 |
| Table 5 – Impulse Voltage Withstand for Indoor Terminations, Installed With Bushing Boots, on Bushings in Accordance with BS2562. | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Impulse Withstand Voltage (kV) | 75 | 95 | 125 | 170 |
MV HV Cables 11kV 33kV – Joints, Terminations & Connections
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
