Cable Joints & Terminations HV

Alroc ASCR1 Jointers Tool Used To Remove Bonded Semicon From MV HV Cables

• uploaded by Chris Dodds T&D Sales & Marketing Manager 

The Video kindly contributed by Watkins & Jacomb CPC shows the cable jointer using Alroc tools to effectively strip and remove the bonded semicon screen from the XLPE insulated 11kV cable prior to installing heat shrink cable terminations.

Alroc ASC R1 | ASC R2 Tool

The Alroc ASC cable tool removes the bonded semi-conductor from MV and HV cables and creates a chamfer on the semi-conductor layer to facilitate the installation of joint, termination or connector.

➡ View the complete range of cable jointing tools for the removing of sheath, insulation and semicon screen from medium/high/extra high voltage power cables.

Cable Tools

Video Contributed By: Watkins and Jacomb Construction Power & Consultancy. WJCPC are specialist LV HV Cable Termination & Jointing contractors with over 20 years experience in the High Voltage Electrical Industry covering the utilities, renewable energy, rail, data centre and general industry sectors – UKPN competent for LV & HV Termination and Jointing Of Cables, Confined Spaces, Substation Entry and Cable Fault Finding.

See also  ➡

• HV Cable Terminations – A Report Into 11kV Heat Shrink Termination Failure
• 11kV Triplex Cables Terminated Using Heat Shrink Cable Terminations
• Cutting 11kV Cables Using Cembre Battery Cable Cutting Tools

Thorne & Derrick

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 

MV HV Cables 11kV 33kV – Cable Joints, Terminations & Connections

Nexans Euromold Bushings & Connectors – How To Select & Specify MV HV Switchgear & Transformer Connectors

Uploaded By Chris Dodds – Thorne & Derrick Sales & Marketing Manager

Euromold Bushings

What Is The Function Of Bushings?

Bushings are electrical equipment devices designed to distribute electric power and energy through a grounded barrier, such as the wall of a transformer or switchgear. The Euromold epoxy bushings provide an insulated and screened connection between the conductors in the equipment and conductor of the cable.

Nexans Euromold are world leaders in the manufacture of Screened Separable Connectors to enable the safe termination of medium voltage and high voltage power cables onto outer cone bushings of electrical equipment including switchgear, transformers and motors up to 66kV – cable connectors for the termination of MV-HV cables into gas insulated switchgear are also available with inner cone bushings, see inner cone plugs.

Euromold connectors are approved by leading gas insulated switchgear and electrical equipment manufacturers including ABB, Schneider, Brush and Siemens.

All Nexans Euromold connectors are 100%  AC withstand and partial discharge tested at Nexans factory prior to shipment.

Euromold bushings are deadbreak bushings for de-energised systems – the power has to be switched off before the connector can be disconnected from the bushing.

The following article enables the correct selection and specification of Nexans Euromold connectors depending on a) cable specification and b) electrical equipment bushing type (A, B, C, D, E or F). The diameter over the core insulation of the cable to be terminated is critical to the reliable performance of separable connectors.

T&D provide an informative overview of the 6 Bushing Interfaces common to MV-HV electrical equipment with dimensions according to European CENELEC EN 50180 and 50181 – this should benefit the electrical design engineer, project manager, project engineer and cable jointer.

Some tips and hints are provided by kind courtesy of the Nexans UK Team.

Nexans Euromold Separable Connectors

Features & Benefits

• Compact Cable Terminations: Fully screened enabling connectors to be installed in close proximity to surrounding steel work and other connectors. Connectors can be touching if required
• Electrical Safety: Safe to touch and weatherproof. Euromold connectors offer excellent mechanical strength
• System Flexibility: The connectors can be disconnected and re-used making the movement of equipment possible without having to re-terminate MV-HV cables
• Ease Of Installation: Nexans Euromold connectors are suitable for use on all polymeric screened MV cable types up to 42kV/66kV

Nexans Euromold connectors must be fitted onto the correct bushing when installed and can be used to terminate both single and 3 core medium voltage cables.

Multiple medium/high voltage cables can be connected per bushing by double-stacking or “piggy-backing” providing flexible solutions to complex cable termination applications.

Bushing Interfaces

The MV-HV electrical equipment to which Nexans Euromold connectors are fitted to must have the correct bushing Interface and be designed to suit the cable specification.

Euromold connectors are suitable for connecting single and 3 core polymeric insulated cables with copper wire or tape screens up to 33kV – this has recently been increased to 66kV/72kV to cater for offshore wind farm cable terminations onto 66kV equipment in wind turbines.

Euromold Overview

• 180AR-1 – Interface A1 equipment bushing
• 180AR-2 – Interface A1 equipment bushing
• 180AR-3 – Interface A1 equipment bushing
• 180A-24P-O – Interface A1 in-air bushing
• 400T1 – Interface B2 equipment bushing
• 400AR-1 – Interface B2 equipment bushing
• 400AR-2 – Interface B2 equipment bushing
• 400AR-8 – Interface B1 equipment bushing
• 400SFR-P – Interface B2 equipment bushing
• 400AR-3 – Interface C1 equipment bushing
• 400AR-4 – Interface C2 equipment bushing
• 400AR-5 – Interface C2 equipment bushing
• 400AR-6 – Interface C1 equipment bushing
• 400SFR-B – Interface C2 equipment bushing
• 400A-24B – Interface C1 in-air bushing
• 670AR-2 – Interface D2 equipment bushing
• 900AR-1 – Interface F3 equipment bushing
• 900AR-2 – Interface F2 equipment bushing
• 900AR-3 – Interface F1 equipment bushing
• 900AR-4 – Interface F1 equipment bushing

Short circuit ratings for Interface Bushings

Euromold Connectors 200 Series

Interface Type A Bushing

• Connector Type :  7.9mm Plug-In Pin Contact
• Voltage Range : 11/12kV-24kV
• Current Rating : 250amps
• Specification : CENELEC EN50180 & EN50181

Euromold 158LR Elbow Connectors are used with 200 Series Interface A Bushing – a Euromold 152SR straight connector option is also available.

Interface A can be identified by the 6 tabs common to 200amp load break systems typical to padmounted transformer applications.

Includes a push-on pin contact bail rather than bolt for connecting to unthreaded medium voltage bushings. The 200 series range of connectors for use with Interface A bushings are common to low powered 11kV transformers typically providing tap-off or direct feed of medium voltage power to remote locations.

➡ See Interface A Connectors & Bushings From Nexans Euromold

Euromold Connectors 400 Series

Interface Type B Bushing

• Connector Type : 14mm Plug-In Pin Contact
• Voltage Range : 11/12kV-33/36kV
• Current Rating : 400amps
• Specification : CENELEC EN50180 & EN50181

Euromold 400LR Elbow Connectors are used with 400 Series Interface B Bushing.

Interface B is common to France and French manufactured medium voltage electrical equipment and Alston Grid Turkey oil type transformers up to 33kV. Interface B bushings are pin-type connectors, not bolted, to the bushings..

➡ See Interface B Connectors & Bushings From Nexans Euromold

Euromold Connectors 400 Series

Interface Type C Compact Bushing

• Connector Type : M16 Bolted Copper Insert
• Voltage Range : 11/12kV-33/36kV
• Current Rating : 630amps | 1250amps
• Specification : CENELEC EN50180 & EN50181

Euromold 430TB Elbow Connectors are used with 400 Series Interface C Bushing.

Bolted M16 Nexans Euromold connectors suit 630amp switchgear systems and can be “piggy-backed” using couplers to terminate multiple cables per phase in compact switchgear – common to the UK switchgear market including both air and gas insulated type equipment.

The physical dimensions of the Interface C connectors are identical to the specification of Interface B design but with bolted contacts.

Interface C1 is 630Amp whereas Interface C2 is 1250Amp.

➡ See Interface C Compact Connectors & Bushings From Nexans Euromold

Video : Nexans Euromold 430TB Tee Connector 11kV-33kV

Euromold Connectors 400 Series

Interface Type C Symmetrical Bushing

• Connector Type : M16 Bolted Copper Insert
• Voltage Range : 11/12kV-42kV
• Current Rating : 1250amps
• Specification : CENELEC EN50180 & EN50181

  ➡ See Interface C Symmetrical Connectors & Bushings From Nexans Euromold

Euromold Connectors 600 Series

Interface Type D Bushing 800Amp

• Deadbreak Connector Type : Bolted 5/8″ Aluminum Stud
• Voltage Range : 12kV-25kV
• Current Rating : 800amps
• Specification : CENELEC EN50180 & EN50181
• Specification : ANSI / IEEE 386 & 404

Type D Bushing – 1250Amp

• Deadbreak Connector Type : Bolted 5/8″ Copper Stud
• Voltage Range : 12kV-25kV
• Current Rating : 1250amps
• Specification : CENELEC EN50180 & EN50181
• Specification : ANSI / IEEE 386 & 404

Interface D bushing connectors are available in both 800A Aluminium (Interface D1) or 1250A Copper (Interface D2).

➡ See Interface D Connectors & Bushings From Nexans Euromold

Euromold Connectors 700 Series

Interface Type E Bushing 800 Amp 

• Deadbreak Connector Type : M16 Bolted Aluminium Insert
• Voltage Range : 12kV-42kV
• Current Rating : 800amps
• Specification : CENELEC EN50180 & EN50181
• Specification : ANSI / IEEE 386 & 404

Type E Bushing – 1250 Amp

• Deadbreak Connector Type : M16 Bolted Copper Insert
• Voltage Range : 12kV-42kV
• Current Rating : 1250amps
• Specification : CENELEC EN50180 & EN50181
• Specification : ANSI / IEEE 386 & 404

➡ See Interface E Connectors & Bushings From Nexans Euromold

Interface E bushing connectors are available in both 800A Aluminium (Interface E1) or 1250A Copper (Interface E2).

Euromold Connectors 900 Series

Interface Type F Bushing 2500 Amp 

• Connector Type : M16 Bolted Copper Insert
• Voltage Range : 12kV-42kV-66kV
• Current Rating : 2500amps
• Specification : CENELEC EN50180 & EN50181

➡ See Interface F Connectors & Bushings From Nexans Euromold

Interface F bushing connectors are available in 630A (Interface F1), 1250A (Interface F2) and 2500A (Interface F3) with tee connector design and supporting range of coupling connectors up to 66kV.

As a rule, ANSI specification type Interface D and Interface E connectors are usually black coloured whereas types A, B & C are orange-brown in colour.

Nexans Euromold surge arresters can be provided depending on the medium voltage earthing system design.

 ♦ Further Reading About Bushings & Connectors Applications

Thorne & Derrick

Nexans Main UK Stockist & Distributor

Contact us for Competitive Prices & Fast Delivery from Stocks for Heat Shrink, Cold Shrink & EPDM Rubber Connectors, Joints & Terminations up to 66kV.

Go to our Price List and contact us with your enquiries.

Heat Shrink Cable Accessories for 11kV Triplex Cables

Thorne & Derrick International are specialist distributors of LV, MV & HV Cable Accessories, Jointing, Substation & Electrical Equipment – servicing UK and global businesses involved in cable installations, jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV, 66kV and EHV.

Stocking & Supplying | Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Jointing Tools | Cable Pulling Eqpt | Earthing & Lightning Protection | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV

Euromold MV HV | Cable Terminations, Connectors, Elbows & Joints

66kV Cable Joints – A Failure Investigation & Conclusions

Euromold | 66kV Joints Connectors Terminations Surge Arresters

Thorne & Derrick are leading specialist distributors of MV HV Joints, Terminations & Connectors for use on 11kV/33kV/66kV cable networks – sadly cable failures are increasingly common on onshore and offshore medium/high voltage cable networks.

A toxic cocktail of unskilled labour which is untrained in both basic cable preparation and tool use is usually the cause – this lethal combination unleashes devastation on clients assets nevermind the incalculable cost of downtime associated with power outages.

This investigation and report explains the causes into why the below 66kV cable joints failed by dissecting the cable joints one by one and recording findings to what could have caused the cable failings.

Severe cable joint failure with cable faulted to destruction – caused by a combination of cable preparation failures and factors.

Comparing dimensions from the screen cut length to the corrugated aluminium cut shows the 66kV cable failure occured at the end of the semicon screen cut.

Failure occurred at the end of the semicon screen cut on the high voltage power cable.

Specialist cable jointing tools to effectively prepare and remove semicon screens on 11kV/33kV and 66kV power cables should always be used by jointers – cable jointers should be trained and competent to install manufacturers products.

Poor heat shrinking technique by the cable jointer with non-uniform wall thickness on this heat shrink insulation tube

Conclusion

The cable joint failure was caused by the poor removal of the semi-conductive and the very bad XLPE insulation preparation. Deep and dirty cuts and burrs can seen in the insulation causing the XLPE insulation to be over stressed and this was what ultimately caused the insulation failure.

All HV cable joints and accessories should only be installed by trained professionals with all the correct accreditation. Any other terminations that have been installed by the above ‘jointer’ should be checked and replaced immediately.

Cold Shrink

3M pioneered the development of Cold Shrink technology for use as a material for the jointing, termination and connection of medium/high voltage cables. Since then cold shrink has been adopted by global utilities as a user-friendly and reliable MV-HV cable accessory range with high performance, stable life cycle and minimal joint or termination failure rates.

Should you require any support with the specification or supply of MV HV joints, terminations or connectors for use on 11kV/33kV/66kV energy networks please do not hesitate to contact us.

Cold Shrink Reliability Low Failure Rates

0.067% Cold Shrink Cable Joints/Splices

0.022% Cold Shrink Cable Terminations

*Data based upon U.S. failure data of U.S. manufactured 3M Cold Shrink Medium & High Voltage Cable Accessories between 2009 and 2012.

Thorne & Derrick

THORNE & DERRICK are national distributors LV, MV & HV Cable Installation, Jointing, Substation Earthing & Electrical Equipment – we service UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Since 1985, T&D have established an international reputation based on SERVICE | INTEGRITY | TRUST.

Contact us for 3M Electrical, ABB, Alroc, AN Wallis, CATU Electrical, Cembre, Centriforce, CMP, CSD, Elastimold, Ellis Patents, Emtelle, Euromold, Filoform , Furse, Lucy Electric & Zodion, Nexans, Pfisterer, Polypipe, Prysmian, Roxtec, Sicame, WT Henley.

Invitation

Thorne & Derrick invite you to join LinkedIn’s largest LV-HV Electrical Discussion Group : Low & High Voltage Power, Cabling, Jointing & Electricals. Discussion subjects include cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV. Network, engage and promote your profile, company or products with over 10,000 influencers.

C&P Awarded Contract for 30MW STOR Gas Generation Facility

C&P Awarded Contract for 30MW STOR Gas Generation Facility

Press Release By Tristan Jones (Sales & Marketing Manager - C&P Engineering Services Ltd)

C&P Engineering Services are delighted to announce that is has been awarded the design and build contract by Enersyst Limited (part of the Walters Group of Companies) for a STOR (Short Term Operating Reserve) 30MW Gas Generation Facility, located off Smoke Lane in Avonmouth, Bristol.

Short Term Operating Reserve

The 30MW STOR facility is one of a number of projects created to service National Grid balancing services. STOR is a demand-side service used by National Grid to provide additional active power from generation or demand reduction. The contract will include full civil and electrical design and build balance of plant works and will include designing, engineering, supplying, installing, constructing, testing and commissioning a fully furnished and operational 30MW gas STOR generation facility.

The project will finally consist of fifteen containerised gas powered gensets, together with associated infrastructure, including vehicle access, pedestrian walkways, foundations, site electrical works, SCADA, substation, control room, transformer and other ancillary items.

The site was first developed in the mid-1960s by Butler Chemicals and was subsequently occupied by Albright and Wilson (1967), Tennaco (1984) and Rhodia (2000). Albermarle Chemicals UK Ltd purchased the site from Rhodia in 2003. The majority of the demolition completed by early 2013.

Over the next 12 months C&P will be working on the design, electrical infrastructure, scada system, cable system, switchgear, M&E fit out of the control building, auxiliary supply to the control building, grid compliance, design of capacitor bank, design and installation of earthing network, testing, commissioning and energisation of the 33kV private network.

David Demock, HV Engineering Manager commented: “This is C&P’s first project with Enersyst and we’re excited to deliver the full balance of plant elements of this 30MW site and a fully operational gas STOR generation facility”.

High Voltage Electrical Services

11kV | 33kV | 132kV

C&P Engineering Services deliver specialist High Voltage Electrical Services to a diverse range of customers in the oil, gas, chemical, petrochemical, heavy engineering, industrial, commercial, construction, renewable energy and nuclear sectors. Services cover design, erection, testing and commissioning and operating for both new HV electrical installation and refurbishment up to and including 132kV.

About C&P Engineering Services

C&P Engineering Services is an electrical and instrumentation engineering solutions provider, providing specialised HV Design & Build Services for 11kV, 33kV and up to 132kV electrical distribution networks. C&P’s high voltage division delivers full balance of plant works for high voltage electrical projects such as STOR, Battery Storage, Wind Energy, Bio Mass, Marine, Offshore Wind, Manufacturing, Nuclear, Petrochemical, Oil and Gas, Chemical and Power Generation.

C&P’s other integrated EC&I engineering services can be combined to provide the total EC&I engineering solution or divided into the following design & build and operation and maintenance specialist areas:

• Instrumentation, Control & Automation

• High Voltage & Extra High Voltage – 11kV | 33kV | 132kV

• Low Voltage Electrical

• Hazardous Area ATEX Electrical & Instrumentation

Contact C&P

Specialist Distributors: LV, MV & HV Cable Jointing, Substation & Electrical Eqpt

THORNE & DERRICK are national distributors of LV, MV & HV Cable Installation, Jointing, Duct Sealing, Earthing & Electrical Equipment – we service UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Contact us for 3M Electrical, ABB, Alroc, AN Wallis, CATU Electrical, Cembre, Centriforce, CMP, CSD, Elastimold, Ellis Patents, Emtelle, Euromold, Filoform , Furse, Lucy Electric & Zodion, Nexans, Pfisterer, Polypipe, Prysmian, Roxtec, Sicame, WT Henley.

Invitation

Thorne & Derrick invite you to join LinkedIn’s largest LV-HV Electrical Discussion Group : Low & High Voltage Power, Cabling, Jointing & Electricals. 

Discussion subjects include cable installations, cable jointing, substation earthing, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Network, engage and promote your profile, company or products with over 10,000 influencers.

33kV Onshore High Voltage Cable Junction Cabinets – Nexans ONJC-S

Nexans ONJC-S Onshore Junction Cabinet

• by Chris Dodds T&D - estimated reading time 5 minutes  

Cable Cabinets

Nexans ONJC-S is an onshore junction cabinet designed, tested and manufactured for onshore renewable projects that can be used as a disconnecting point for branching between grid and applications – for applications with MV-HV separable connectors up to 42kV (630A) according to CENELEC HD 629.1 S2.

The ONJC-S onshore junction cabinet has a pedestal type powder coated ASIS 304 stainless steel housing structure, robust design with IP43 degree protection (IEC60529/EN62262 ed1:2002-02) and RAL 7037 coolcoat UV resistant coating.

33kV Onshore High Voltage Cable Junction Cabinets – Nexans ONJC-S

Nexans ONJC-S – Benefits

Medium/High Voltage MV HV Cable Cabinets

• The cable termination cabinet design is specifically suitable to be installed in outside conditions
• High accessibility for ease of installation
• Ideal test and demarcation point
• Time saving on installation and down time
• Reducing cost of installation
• Reduction of footprint

Nexans ONJC-S 33kV Onshore High Voltage Cable Junction Cabinets

Onshore Cable Junction Cabinet Comprising

1. Pedestal type powder coated metal housing with keyed (europrofile cylinder) frontplate
2. 2 way screened junction on stainless steel base plate and cover
3. Disconnectable earth
4. Tinned earth bar 5×30 mm on insulated stand offs
5. Earthing connection point
6. Cable cleats arrangement, up to 4 rails for max. 12 single core cables with outer cable diameter 26-52 mm
7. Removable frontplate to facilitate cable access

33kV Onshore High Voltage Cable Junction Cabinets

33kV Onshore High Voltage Cable Junction Cabinets – Dimensions

Cable Cleat Arrangements

Options: non standard colour for powder coated housing and anti-graffitti treatment of the powder coated housing.

Nexans cables include British & European standard medium/high voltage (MV-HV) power cables for distribution of 11kV to 33kV electricity using polymeric insulated (XLPE) single or 3-core cables, with armour/unarmoured and copper wire or copper tape screen options.

THORNE & DERRICK are national distributors LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – we service UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Since 1985, T&D have established an international reputation based on SERVICE | INTEGRITY | TRUST.

Contact us for 3M Electrical, ABB, Alroc, AN Wallis, CATU Electrical, Cembre, Centriforce, CMP, CSD, Elastimold, Ellis Patents, Emtelle, Euromold, Filoform , Furse, Lucy Electric & Zodion, Nexans, Pfisterer, Polypipe, Prysmian, Roxtec, Sicame, WT Henley.

Invitation

Thorne & Derrick invite you to join LinkedIn’s largest LV-HV Electrical Discussion Group : Low & High Voltage Power, Cabling, Jointing & Electricals. Discussion subjects include cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV. Network, engage and promote your profile, company or products with over 10,000 influencers.