Blog

Medium Voltage Surge Arresters

• uploaded by Chris Dodds - Thorne & Derrick Sales + Marketing Manager

In this series of 15 blogs we provide Chapter breakdowns for the Nexans published book, “Medium Voltage Cable Accessories, A Theoretical and Practical Approach”.

Today, we overview Chapter 15, Medium Voltage Surge Arresters.

The book covers the installation of medium voltage cable terminations, separable connectors, cable joints and associated LV MV HV Power Cable Accessories such as cable glands, lugs and cable cleats.

Great emphasis is placed on failure modes of medium voltage cables and methods of preventing potential problems in service of electrical power systems operating typically at 11kV/33kV.

Essential reading for:

• Lead Electrical Engineers
• Electrical Project Engineers
• Principal Electrical Engineers
• Plant Engineers
• LV HV EHV Cable Jointers
• ATEX Inspectors
• Substation Commissioning Managers
• LV HV EHV Project Managers
• Buyers & Procurement Managers
• SAP’s
• Sales Managers & Engineers

The book is an instant hit with DNO’s, IDNO’S, ICP’s, MV HV Cable Jointers, Cable Contractors, Cable Jointer Training Centres, Electrical Contractors and Substation Engineers.

Chapter 15

Medium Voltage Surge Arresters

From Medium Voltage Cable Accessories

• 15.1. Introduction to medium voltage surge arresters
• 15.2. Metal oxide surge arresters
• 15.3. Typical MV surge arresters and connections

Nexans (Euromold) manufacture high voltage Screened Separable Connectors (Elbow & Bolted Tee), Cable Joints & Cable Terminations (Cold Shrink & Heat Shrink), Bushings and Surge Arresters are available to suit 11kV, 33kV and up to 66kV distribution networks.

Medium Voltage Cable Accessories Book Published By Nexans

• Format: Hardback
• Extent: 160pp
• Size: 300x215mm [Nexans 11kV 33kV Cable Jointers Book]
• ISBN: 978-0-9573785-0-6
• RRP: £79.99
• Illustrations: Nexans Power Accessories (UK)
• Publication Date: March 2013

Medium Voltage Cable Accessories Book Published By Nexans

NEXANS pOWER CABLE ACCESSORIES

In January 2018 Thorne & Derrick International, based in the UK, signed a UK Distribution Agreement with Nexans Power Accessories UK.

T&D 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 maintenance and installation of HV transformers and switchgear.

• 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

Signing the new Nexans Power Accessories UK Distribution Agreement is a key part of Thorne & Derrick’s growth strategy for the next 5 years.

With T&D’s knowledge and experience of stocking and supplying Medium & High Voltage Cable Accessories this new partnership with Nexans delivers the most complete range of Joints, Terminations and Connectors for medium voltage power systems.

Training Courses & Services For Cable Jointers

Empower your CV and skill-set by grasping the 66kV Jointer Training opportunity. Jointers must currently be 33kV Competent and experienced to be ready to undertake the step-up to 66kV from 33kV. 11kV Jointer Training Courses also available.

Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.

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 HV 

Type Testing Of Medium Voltage Cable Accessories

• uploaded by Chris Dodds - Thorne & Derrick Sales + Marketing Manager

In this series of 15 blogs we provide Chapter breakdowns for the Nexans published book, “Medium Voltage Cable Accessories, A Theoretical and Practical Approach”.

Today, we overview Chapter 14, Type Testing Of Medium Voltage Cable Accessories.

The book covers the installation of medium voltage cable terminations, separable connectors, cable joints and associated LV MV HV Power Cable Accessories such as cable glands, lugs and cable cleats.

Great emphasis is placed on failure modes of medium voltage cables and methods of preventing potential problems in service of electrical power systems operating typically at 11kV/33kV.

Essential reading for:

• Lead Electrical Engineers
• Electrical Project Engineers
• Principal Electrical Engineers
• Plant Engineers
• LV HV EHV Cable Jointers
• ATEX Inspectors
• Substation Commissioning Managers
• LV HV EHV Project Managers
• Buyers & Procurement Managers
• SAP’s
• Sales Managers & Engineers

The book is an instant hit with DNO’s, IDNO’S, ICP’s, MV HV Cable Jointers, Cable Contractors, Cable Jointer Training Centres, Electrical Contractors and Substation Engineers.

Chapter 14

Type Testing Of Medium Voltage Cable Accessories

From Medium Voltage Cable Accessories

• 14.1. Introduction
• 14.2. Some qualification tests for accessories
• 14.2.1. DC withstand
• 14.2.2. AC dry withstand
• 14.2.3. AC wet withstand – outdoor terminations only
• 14.2.4. Partial discharge of MV cable accessories
• 14.2.5. Impact test – MV cable joints only
• 14.2.6. Thermal cycling
• 14.2.7. Impulse voltage withstand
• 14.2.8. Humidity – indoor MV cable terminations only
• 14.2.9. Salt fog test – outdoor MV cable terminations only
• 14.2.10. Immersion test – outdoor MV cable terminations only
• 14.2.11. Thermal short circuit
• 14.2.12. Dynamic short circuit
• 14.2.13. Inspection of medium voltage cable accessories
• 14.3. Test voltage levels
• 14.4. Testing medium voltage cable terminations to HD 629/BS 7888 14.5. Testing joints to HD 629/BS 7888
• 14.6. Testing screened separable connectors
• 14.7. Limitations of medium voltage type testing

Nexans (Euromold) manufacture high voltage Screened Separable Connectors (Elbow & Bolted Tee), Cable Joints & Cable Terminations (Cold Shrink & Heat Shrink), Bushings and Surge Arresters are available to suit 11kV, 33kV and up to 66kV distribution networks.

Medium Voltage Cable Accessories Book Published By Nexans

• Format: Hardback
• Extent: 160pp
• Size: 300x215mm [Nexans 11kV 33kV Cable Jointers Book]
• ISBN: 978-0-9573785-0-6
• RRP: £79.99
• Illustrations: Nexans Power Accessories (UK)
• Publication Date: March 2013

Medium Voltage Cable Accessories Book Published By Nexans

NEXANS pOWER CABLE ACCESSORIES

In January 2018 Thorne & Derrick International, based in the UK, signed a UK Distribution Agreement with Nexans Power Accessories UK.

T&D 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 maintenance and installation of HV transformers and switchgear.

• 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

Signing the new Nexans Power Accessories UK Distribution Agreement is a key part of Thorne & Derrick’s growth strategy for the next 5 years.

With T&D’s knowledge and experience of stocking and supplying Medium & High Voltage Cable Accessories this new partnership with Nexans delivers the most complete range of Joints, Terminations and Connectors for medium voltage power systems.

Training Courses & Services For Cable Jointers

Empower your CV and skill-set by grasping the 66kV Jointer Training opportunity. Jointers must currently be 33kV Competent and experienced to be ready to undertake the step-up to 66kV from 33kV. 11kV Jointer Training Courses also available.

Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.

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 HV 

Earthing Of Medium Voltage Single Core Cables

• uploaded by Chris Dodds - Thorne & Derrick Sales + Marketing Manager

In this series of 15 blogs we provide Chapter breakdowns for the Nexans published book, “Medium Voltage Cable Accessories, A Theoretical and Practical Approach”.

Today, we overview Chapter 13, Earthing Of Medium Voltage Single Core Cables.

The book covers the installation of medium voltage cable terminations, separable connectors, cable joints and associated LV MV HV Power Cable Accessories such as cable glands, lugs and cable cleats.

Great emphasis is placed on failure modes of medium voltage cables and methods of preventing potential problems in service of electrical power systems operating typically at 11kV/33kV.

Essential reading for:

• Lead Electrical Engineers
• Electrical Project Engineers
• Principal Electrical Engineers
• Plant Engineers
• LV HV EHV Cable Jointers
• ATEX Inspectors
• Substation Commissioning Managers
• LV HV EHV Project Managers
• Buyers & Procurement Managers
• SAP’s
• Sales Managers & Engineers

The book is an instant hit with DNO’s, IDNO’S, ICP’s, MV HV Cable Jointers, Cable Contractors, Cable Jointer Training Centres, Electrical Contractors and Substation Engineers.

Chapter 13

Earthing Of Medium Voltage Single Core Cables

From Medium Voltage Cable Accessories

• 13.1. Induced voltages and currents in single core cables
• 13.1.1. Induced voltage in medium voltage cables
• 13.1.2. Induced current in medium voltage cables
• 13.2. Some practical situations
• 13.2.1. Short medium voltage cable length
• 13.2.2. Medium cable length
• 13.2.3. Long medium voltage cable runs
• 13.3. Fault caused by circulating current
• 13.4. Conclusions on medium voltage power cables

Nexans (Euromold) manufacture high voltage Screened Separable Connectors (Elbow & Bolted Tee), Cable Joints & Cable Terminations (Cold Shrink & Heat Shrink), Bushings and Surge Arresters are available to suit 11kV, 33kV and up to 66kV distribution networks.

Medium Voltage Cable Accessories Book Published By Nexans

• Format: Hardback
• Extent: 160pp
• Size: 300x215mm [Nexans 11kV 33kV Cable Jointers Book]
• ISBN: 978-0-9573785-0-6
• RRP: £79.99
• Illustrations: Nexans Power Accessories (UK)
• Publication Date: March 2013

Medium Voltage Cable Accessories Book Published By Nexans

NEXANS pOWER CABLE ACCESSORIES

In January 2018 Thorne & Derrick International, based in the UK, signed a UK Distribution Agreement with Nexans Power Accessories UK.

T&D 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 maintenance and installation of HV transformers and switchgear.

• 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

Signing the new Nexans Power Accessories UK Distribution Agreement is a key part of Thorne & Derrick’s growth strategy for the next 5 years.

With T&D’s knowledge and experience of stocking and supplying Medium & High Voltage Cable Accessories this new partnership with Nexans delivers the most complete range of Joints, Terminations and Connectors for medium voltage power systems.

Training Courses & Services For Cable Jointers

Empower your CV and skill-set by grasping the 66kV Jointer Training opportunity. Jointers must currently be 33kV Competent and experienced to be ready to undertake the step-up to 66kV from 33kV. 11kV Jointer Training Courses also available.

Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.

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 HV 

Thorne & Derrick & BASEC | Providing Quality & Safety for the Cable Industry

Press Release: Written by Chris Dodds – Thorne & Derrick Sales & Marketing Manager

Thorne & Derrick have officially partnered with BASEC to promote our shared ambition of providing electrical safety by encouraging industry stakeholders to specify and buy accredited, tested and certified Quality Cables & Cable Accessories.

Here’s Why…..

Last week, a lightning strike triggered a power cut which caused a 5% loss of power to the UK electricity distribution grid.

BBC

Such power losses can be a localised nuisance or a national catastrophe and caused by a number of natural or man-made factors: copper theft, fire damage, bird collision, digger damage or issues of Cable Quality.

Cable Quality & Safety

Natural disasters are accidental and inevitable beyond the control of humankind – however Cable Quality can be assured by independent accredited certification bodies for the cable industry at a worldwide level.

Since 1985, Thorne & Derrick International have been synonymous with the supply and distribution of tested, certified and accredited Cable Accessories by leading manufacturers including ABB, 3M Electrical, Nexans Euromold, Pfisterer and Prysmian to guarantee the highest levels of reliability for LV MV HV power systems.

The British Approvals Service for Cables (BASEC) is a recognised sign of assurance of independent cable testing and approval. As an independent body, BASEC has for nearly 40 years been a mark of reassurance to those specifying cable.

“BASEC approached Thorne & Derrick to discuss a potential working partnership – based on the obvious synergies and market positions of both our companies the opportunity to jointly prepare and share highly relevant and impartial technical insights was a natural attraction. Both companies have a passion for and pride in upholding industry standards, specifications and ultimately installations,” comments Harpreet Suree (Marketing Manager at BASEC).

“The BASEC mark gives complete assurance to cable manufacturers, wholesalers, specifiers, purchasers and installers alike,” adds Harpreet.

“Indeed, Thorne & Derrrick working with BASEC will be developing a range of informative resources to achieve our goals – this will include Online Blogs, Case Studies, Meeting Invitations, Seminars, CPD Courses, Training Courses & Online Tutorials. We are privileged to stand shoulder-to-shoulder with BASEC. We would extend this co-operation opportunity to like-minded companies and people sharing a common professional interest. Call us for an informal chat today,” comments Chris Dodds.

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 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

Joint Terminate Connect MV HV Cables

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 HV 

Medium Voltage Cable Joints – An Overview

• uploaded by Chris Dodds - Thorne & Derrick Sales + Marketing Manager

In this series of 15 blogs we provide Chapter breakdowns for the Nexans published book, “Medium Voltage Cable Accessories, A Theoretical and Practical Approach”.

Today, we overview Chapter 12, Medium Voltage Cable Joints – An Overview

The book covers the installation of medium voltage cable terminations, separable connectors, cable joints and associated LV MV HV Power Cable Accessories such as cable glands, lugs and cable cleats.

Great emphasis is placed on failure modes of medium voltage cables and methods of preventing potential problems in service of electrical power systems operating typically at 11kV/33kV.

Essential reading for:

• Lead Electrical Engineers
• Electrical Project Engineers
• Principal Electrical Engineers
• Plant Engineers
• LV HV EHV Cable Jointers
• ATEX Inspectors
• Substation Commissioning Managers
• LV HV EHV Project Managers
• Buyers & Procurement Managers
• SAP’s
• Sales Managers & Engineers

The book is an instant hit with DNO’s, IDNO’S, ICP’s, MV HV Cable Jointers, Cable Contractors, Cable Jointer Training Centres, Electrical Contractors and Substation Engineers.

Chapter 12

Medium Voltage Cable Joints An Overview

From Medium Voltage Cable Accessories

• 12.1. Introduction
• 12.2. Connecting the medium voltage conductors
• 12.2.1. Crimped connectors
• 12.2.2. Mechanical connectors
• 12.3. The elimination of air from critical areas
• 12.3.1. Stress relieving tape
• 12.3.2. Faraday Cage
• 12.4. Stress control in medium voltage cable joints
• 12.4.1. Geometric type – a) push on cable joints
• 12.4.2. Geometric type – b) cold shrink cable joints
• 12.4.3. High permittivity
• 12.5. Thickness of insulation
• 12.6. Sealing the medium voltage joint
• 12.6.1. The one piece cable joint
• 12.6.2. The multi layered cable joint
• 12.7. Earthing medium voltage cable joints
• 12.7.1. Single core cable joints
• 12.7.2. Three core cable joint earth
• 12.8. Mechanical strength
• 12.9. Hybrid cable joints
• 12.9.1. Moulded Faraday Cage over connector
• 12.9.2. Shrink tubes and resin combination

Nexans (Euromold) manufacture high voltage Screened Separable Connectors (Elbow & Bolted Tee), Cable Joints & Cable Terminations (Cold Shrink & Heat Shrink), Bushings and Surge Arresters are available to suit 11kV, 33kV and up to 66kV distribution networks.

Medium Voltage Cable Accessories Book Published By Nexans

• Format: Hardback
• Extent: 160pp
• Size: 300x215mm [Nexans 11kV 33kV Cable Jointers Book]
• ISBN: 978-0-9573785-0-6
• RRP: £79.99
• Illustrations: Nexans Power Accessories (UK)
• Publication Date: March 2013

Medium Voltage Cable Accessories Book Published By Nexans

NEXANS pOWER CABLE ACCESSORIES

In January 2018 Thorne & Derrick International, based in the UK, signed a UK Distribution Agreement with Nexans Power Accessories UK.

T&D 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 maintenance and installation of HV transformers and switchgear.

• 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

Signing the new Nexans Power Accessories UK Distribution Agreement is a key part of Thorne & Derrick’s growth strategy for the next 5 years.

With T&D’s knowledge and experience of stocking and supplying Medium & High Voltage Cable Accessories this new partnership with Nexans delivers the most complete range of Joints, Terminations and Connectors for medium voltage power systems.

Training Courses & Services For Cable Jointers

Empower your CV and skill-set by grasping the 66kV Jointer Training opportunity. Jointers must currently be 33kV Competent and experienced to be ready to undertake the step-up to 66kV from 33kV. 11kV Jointer Training Courses also available.

Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.

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 HV