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110kV Prysmian Plug-In Cable Termination For SF6 Gas Insulated Switchgear

Pictured: 110kV Prysmian Plug-In Cable Termination For SF6 Gas Insulated Switchgear

Image courtesy of: Andrew Brezovszky (EHV Cable Jointer & Director at Matrix Power Solution Pty Ltd)

Thorne & Derrick are distributors for Prysmian Cable Components which includes their range of Bicon cable joints, cable cleats, cable glands and jointer tooling for LV, MV and HV cables.

Some Comments via LinkedIn

Ahmed Gouda : Great job! But if i may ask, why you did not install the insulator first inside the GIS housing?

Andrew Brezovszky : Hi Ahmed, not sure about your question … As far as I’m aware, there isn’t another method for these GIS cable terminations. When we are actually plugging them in, we install the shield and connectors and that’s how they are being raised into the chamber.

Chris Barker : Ahmed in answer to your question. Certain manufacturers have the insulator installed first then the cable termination is made and plugged into the insulator. Others you complete the termination and then plug into the switchgear.

Ahmed Gouda : Yes, normally in the plug in type, the insulator is mounted first in the cable housing then the cable with the stress cone is plugged in. Otherwise if its a wet type termination ( insulator is filled with oil).

Chris Barker : Some company’s have a dry type which they still mount the insulator on the cable then into the switchgear.

Prysmian HV Cable Accessories – Overview

• Straight Joints
• Stop Joints
• Outdoor Terminations (ODSE)
• SF6 – Immersed Terminations (SF6-OISE)
• Transition Joints
• Fluid Filled Tanks

800kV Water Termination System For 500kV XLPE Cable Testing

Image courtesy of: Johnny Chan – Marketing Executive at Yangzhou Power Electric Co. Ltd

Pictured: 800kV Water Termination System For 500kV XLPE Cable Testing

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. ➡

Pfisterer Connex Cable Plugs Terminating XLPE Cable Into 11kV/33kV Transformer

Image courtesy of: Darren Street – Cable Jointer at D+R Jointing Services Ltd

Pictured: Pfisterer Connex Cable Plugs Terminating XLPE Cable Into 11kV/33kV Transformer – the Connex cable terminations are shown connecting 33kV single core 500sqmm cables into a 33kV to 11kV transformer.

T&D are Main Distributors & Stockists for the Pfisterer range of Medium Voltage Power Products including Connex Plugs, Cable Jointing Tools, Sicon Connectors, Surge Arresters, SEANEX and Electrical Safety Equipment.

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. ➡

HVPD Case Study | Offline TDR Testing of a 25kV Cable for Rapid Transit Organisation

• Special thanks to Harriet Robertshaw at HVPD for the kind permission to republish
   

Medium Voltage Project

Following the visual identification of a fault in a 25kV cable, a Rapid Transit Organisation in the UK had a requirement to locate the presence of any further faults across its cable network, which was approximately 40 years old.

Offline Time Domain Reflectometry (TDR) testing was conducted across three sections of 25kV trackside PILC to pinpoint the locations of any further insulation degradation present.

Solution

• HVPD Pulse Generator
• Diagnostic Unit

Offline TDR testing was conducted from the known failure point of the cable, back to each cable sealing end termination using an HVPD Diagnostic Unit.

Offline TDR testing was also conducted on an additional cable section from an Overhead Line Equipment (OLE) switch. The cable was mapped using a Pulse Generator.

Background Theory

Offline TDR is performed by injecting a low voltage pulse onto the core of the cable under test. High changes of impedance within the cable will create reflections of the original injected pulse.

These areas of high impedance change can typically be attributed to either cable faults or joints and therefore analysis of these pulse reflections can indicate fault and joint locations. TDR can also be used as a tool to verify the total length of the cable if this is unknown.

The test is carried out by measuring the injected pulse return time (i.e. the time for an injected pulse to propagate from one cable end and back) in order to provide the locations of changes in impedances, such as cable joints and the end of the cable. TDR testing is utilised to provide accurate fault location data in cables.

Background Theory

Results

Initial results showed that there were no visible impedances relating to cable joints or faults in the cable section located from the original failure point back to sealing end terminations.

However further testing of the cable section leading back to an OLE switch demonstrated a large impedance change not associated with any known joint location. This impedance location was observed to be approximately 239 meters from the test location.

Following this observation, a visual inspection along the identified cable section route was performed. Upon lifting the cables covers at approximately 241 meters along the cable from the test point a visibly clear cable fault was identified.

TDR Trace

Inspection of Cable Fault Location

Conclusions and Recommendations

• Offline TDR testing revealed an unknown cable fault, which had the potential to cause further risk of an in-service cable failure
• The cable section with the fault was subsequently removed and cable repaired
• Further TDR testing is required on this cable and additional cables in the network to determine if any other points of degradation are present

About HVPD

HVPD supplies a comprehensive range of equipment to detect and monitor On-line PD for the condition assessment of in-service power cables, switchgear, motors and generators, and transformers rated at 3.3kV and above. Our PD testing and monitoring technology provide you with an early warning of developing insulation faults, helping you to avoid costly failures and resulting unplanned network outages.

To find out how we can test and monitor your cable network for PD and locate any faults, terminations or joints, get in touch today at [email protected] or call us on 0161 877 6142.

Thorne & Derrick

Specialist Electrical Distributor

Established since 1985, T&D International based in the UK distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Pulling & Installation Equipment – contact us today for a competitive quotation.

Key Products : MV Joints & Terminations, Access Chambers, Cable Cleats, Duct Seals, Cable Transits, Jointing Tools, Feeder Pillars, Cable Duct, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Clothing Protection & Fusegear.

Distributors for : 3M, Pfisterer CONNEX, Nexans Euromold, Elastimold, Catu, Roxtec, Emtelle, Centriforce, Lucy Zodion, Alroc, Cembre, Prysmian, Ellis Patents, ABB & Furse.

T&D Providers Of Jointer Training Courses By Pfisterer CONNEX & Nexans Euromold

11kV Triplex Cable Joints Using Raychem Straight Heat Shrink Joints (UKPN)

• Application: 11kV Triplex Cable Joints Using Raychem Straight Heat Shrink Joints
• Cable Type: 11kV Triplex Cable Joints
• Cable Jointer: Darren Street Cable Jointer at D+R Jointing Services
• Featured Manufacturer: Raychem

11kV Triplex Cable Joints

11kV triplex cables provide high voltage (HV) mains power distribution for utility and industrial applications – 11kV triplex cable consists of three single core high voltage cables in triplex formation according to BS7870 – 4.10. separable connectors are also known as screened elbow connectors or tee connectors.

11kV heat shrink cable joints suit unarmoured and armoured cables – this includes high voltage industrial power (XLPE BS6622 BS7835 with aluminium wire armour AWA) and marine offshore ship cable (EPR BS6883 with galvanised/phosphur wire braid) and copper wire or copper tape screen. Suitable also for BS7870 triplex cables.

Options include transition (PILC to XLPE) and transition trifurcating (3 x single core PILC to 3 Core XLPE) cable joints.

HV CABLE JOINTS – HEAT SHRINK JOINTS 11KV 33KV HIGH VOLTAGE CABLES

Heat shrink cable joints include straight, transition and branch types for XLPE, PILC and EPR single and 3 core cables – suitable for all types of polymeric and paper insulated medium/high voltage cables with/without steel wire armour or braid, copper tape/wire screens and copper or aluminium conductors up to 33kV.

Heat Shrink Cable Joints For 11kV High/Medium Voltage Cables

Cable Joints | 11kV 33kV | Medium & High Voltage Cables MV HV | Heat Shrink

Should you require any assistance with the selection or specification of 11kV triplex cables please do not hesitate to contact us.

Thorne & Derrick Specialist Electrical Distributor

LV ♦ MV ♦ HV

T&D distribute the most extensive range of LV, MV & HV Cable Jointing, Terminating, Installation & Cable Pulling Equipment – we service UK and international clients working on underground cables, overhead lines, substations and electrical construction at LV, 11kV, 33kV and EHV transmission and distribution voltages.

• Key Products: MV-HV Cable Joints & Terminations, Cable Cleats, Sealing Cable Ducts, Cable Transits, Underground Cable Protection, Cable Jointing Tools, Feeder Pillars, Cable Ducting, Earthing & Lightning Protection, Electrical Safety, Cable Glands, Arc Flash Protection & Fusegear.

• Distributors for: 3M, ABB, Alroc, Band-It, Catu, Cembre, Centriforce, CMP, Elastimold, Ellis Patents, Emtelle, Furse, Lucy Zodion, Nexans Euromold, Pfisterer, Polypipe, Prysmian, Roxtec.

LV – Low Voltage Cable Joints, Glands, Cleats, Lugs & Accessories (1000 Volts)

MV HV – Medium & High Voltage Cable Joints, Terminations & Connectors (11kV 33kV EHV)

Cable Laying – Underground Cable Covers, Ducting, Seals & Cable Pulling Equipment

More…

T&D’s Power Blog covers: LV MV HV & EHV Transmission & Distribution, Substations, Switchgear, Cable Jointing & Termination, Cable Fault & Repair, Underground Cables

➡ Visit Power Blog.