Cable Jointing Tools

Cable Peeling Tool HV High Voltage Cables – ALROC AMF5 55-160 NSCF

Jointers Cable Tools | Low Medium High Voltage | LV MV HV 11kV 33kV 66kV 132kV

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

Cable Peeling Tool (Motorised)

Remove Bonded Semicon Screen & XLPE Insulation From Extra High Voltage Cables

Alroc AMF5 55-160 cable peeling tools are used by HV-EHV cable jointers for the removal of XLPE insulation and shaving of semi-conductive (bonded semi-con screen) on transmission and distribution cables from 132kV up to 400kV.

Alroc AMF5 55-160 tool can be used on HV-EHV cables with an outside diameter range of 55-160mm and is designed to make the removal of high voltage polymeric cable insulation (XLPE) simple and efficient with significantly reduced sanding required by the cable jointer using a lower grit abrasive.

The cable jointing tool provides XLPE insulation removal and lengthening of the cable chamfer on the transition to enable installation of cable joints, terminations or connectors.

Alroc AMF5 55-160 is a motorised HV-EHV underground cable peeling tool used in conjunction with the Alroc BMFD/50-160 tool when chamfering HV cables – the jointing tool will perform a cable chamfer but not pencilling of high voltage power cables.

Tools also available to remove bonded screens from 11kV/33kV cables with XLPE insulation.

Cable Tool Capability

• Diameter 55-160mm
• Bonded Semicon Thickness Capacity 3mm
• Remaining Length Of The Semicon 80mm
• XLPE Cable Insulation Thickness 35mm
• Tool Guiding Ball Bearings (No Silicone Required)

Associated Cable Jointing Tools

Alroc DMSR /80-160 High Voltage Outer Cable Sheath Stripping Tool
Alroc CHN4/50-110 NS High Voltage XLPE Insulation Tapering Tool
Alroc GR I-R TE – High Voltage Bonded Semicon Scraping Tool

T&D are leading stockist for the complete range of Alroc Cable Tools for removing cable sheath, insulation and screen from LV, HV, HV and EHV power cables.

Alroc AMF5 55-160 NSCF Cable Jointing Tool

Here in the video the Alroc jointing tool is shown preparing and shaving the semicon screen on a 400kV 2500sqmm EHV cable with polymeric XLPE type insulation.

♦ Bonded Semiconductor Removal – the semicon screen is removed in a controlled and steady preparation (16 wheels rolling around the cable) effectively shaping the cable round over the XLPE insulation. A constant diameter over the XLPE insulation is achieved preventing the tool blade from digging or cutting into the insulation.

♦ XLPE Insulation Removal – the back-iron enables the cable jointer to set the pitch of the tool thus making the rotation of the cable tool easy when removing the high voltage XLPE cable insulation.

Image : Goodbye Glass. Jimmy Nicklin (HV EHV Jointer) – the Alroc AMF5 55-160 tool removes the need for HV jointers to “glass” the outer conductive sheaths as the highly precision engineered cable jointing tool provides accurate stripping of cables in a motor controlled rather than manual process.

XLPE Cables HVDC

The design and construction of the transmission grid of the future with overhead transmission lines and underground cable required to meet future demand of electricity supply has led to the development by ABB of XLPE DC cables rated higher than 500kV.

The EirGrid East-West Interconnector (EWIP) links the high-voltage power grids of Ireland and Great Britain by means of an HVDC Light interconnection. The interconnector enables Ireland to import and export power to and from Britain, thereby creating a more competitive home market and reducing consumer prices.

ABB were responsible for delivering the entire solution – including design, engineering, type testing, manufacture, civil works, cable pulling/laying, cable jointing, trenching, installation and commissioning. The video shows the loading of the high voltage cable for the project EirGrid East West Interconnector (EWIP) that took place in April 2012 in Karlskrona, Sweden.

Image: ABB. 525kV DC XLPE Cable Insulation – Extra High Voltage EHV

More

• Removing LC Shield MV Medium Voltage Cables – Alroc PF3/06
• Removing Bonded Semicon Screen 11kV 33kV Cables – Alroc CWB18-60
• MV HV Power Cables & How To Remove Fabric Layers – Some Cable Jointers Tips
• Removing Outer Sheath HV EHV Cables – Alroc DMSR/80-160

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

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 

T&D Distributors | 3M | Prysmian | Nexans Euromold | Elastimold | Pfisterer CONNEX

Alroc CAMF4/40-90-BBCF – Multifunction Cable Jointers Tool For Bonded Semiconductor & Insulation

Alroc Cable Jointing Tools | MV HV EHV 11kV 33kV 66kV 132kV

•  uploaded by Chris Dodds - reading time 5 minutes 

Alroc

Alroc are market-leading manufacturers of cable jointing tools to ensure the accurate preparation of power cables working at Low, Medium & High Voltage.

Alroc CAMF4/40-90-BBCF multifunction cable jointing tool is used to remove the outer bonded semi-conductor and the insulation from medium/high voltage power cables.

• Diameter ø40-90 mm  – ø1.575 – 3.543″

1. Alroc CAMF4/40-90-BBCF enables the MV-HV Cable Jointer to remove the bonded semiconductor

• Bonded semicon thickness capacity 2.5mm / 0.098 in
• Remaining length of the semicon 55mm / 2.165 in

No silicone – the ball bearings in contact with the MV-HV cable enable an easy rotation of the cable preparation and jointing tool.

Low Roughness Over Insulation
Bonded semiconductor removal – very steady (16 ball bearings rolling around the cable), shaping the cable round over the insulation , constant diameter over the insulation, prevent the blade from digging into the insulation, perform a chamfer on transition between the insulation and the semiconductor.

2. Alroc CAMF4/40-90-BBCF enables the MV-HV Cable Jointer to remove the polymeric insulation (XLPE)

• Cable insulation thickness capacity – 35.mm / 1.378 in

Cable Jointing Tool

The tool includes a function for the jointer to simply adjust the outer cable diameter for removal of cable sheath – once the cutting blade is correctly set and positioned the cable jointer rotates the tool around the MV-HV cable in a circular motion. Adjustment of the Alroc tool is simple using the back-iron for clean and consistent cutting of the power cables.

Fine adjustment of the semiconductor shaving depth is possible for precision cable engineering of the semicon cut. Similarly, adjustment of the cable cutting depth using the Alroc CAMF4/40-90-BBCF is possible – the ball bearings can be switched to rotate statically to enable the cable jointer to create a chamfer and groove in the medium/high voltage cable insulation.

The Alroc CAMF4/40-90-BBCF jointing tool performs an excellent semicon cut to ensure the safety and reliability of the cable joint, termination or connectors.

➡ Watch the complete Alroc video here:

Alroc CAMF cable preparation tools can be split for removal by the Jointer – this is a particular benefit for the cable jointer where they solder the cable connector allowing the tool to be easily removed from the HV cable when being used to strip and prepare offshore and submarine cables prior to installing HV joints, terminations or connectors.

The ALROC CAMF440 90 tool features a push/button locking system and also facilitates the Jointer to create a groove in the XLPE insulation (with their blade option) and shave bonded semi-con screens – the tool has 16 wheels rolling against the cable with 4 (or 8) contact points. The unique design of the Alroc tool prevents the cutting blade digging into the XLPE insulation when preparing high voltage power cables with XLPE insulation.

These Jointers Tools are used typically on 132kV high voltage transmission cable circuits, in accordance with EC 60840, to prepare XLPE single core power cables for jointing and termination applications into GIS Switchgear and installation of AIS Cable Sealing Ends.

XLPE Insulation Removal

From High Voltage Cables

Back-iron that enables the cable jointer to tune the pitch of the jointing tool thus making the rotation of the tool easy when removing the insulation from medium/high voltage power cables (MV-HV).

Chamfering Cables

Chamfering – HV High Voltage Cables XLPE Insulation

Grooving Cables

Grooving – HV High Voltage Cables XLPE Insulation

Shaving Cables

Shaving – HV High Voltage Cables XLPE Insulation

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, substation earthing and electrical construction at LV, 11kV, 33kV and EHV transmission and distribution voltages.

• Key Products: MV-HV Cable Joints & Terminations, Cable Cleats, Duct Seals, 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.

The Alroc range of jointing tools are extensively used to enable the installation of MV HV Joints, Terminations & Connectors including Prysmian, Elastimold, 3M, Pfisterer and Nexans Euromold.

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

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.

MV HV Power Cables & How To Remove Fabric Layers – Some Cable Jointers Tips

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

Preparation of MV-HV cables is critical to the electrical performance and reliability of medium/high voltage power cable circuits – failure to correctly strip, remove or cut cable construction layers using the appropriate Cable Jointing Tools can build-in future failure to the installed medium/high voltage cable joint, termination or connectors.

The following LinkedIn Comments provide expert guidance and advice on how to remove fabric layers from MV-HV cables without jeopardising or compromising cable functionality.

Medium & High Voltage Cable Jointing

Cable type pictured is 15kV Medium/High Voltage power cable

15kV MV Primary UD EPR Cable Specification

• Primary Underground Distribution Cable (Single Phase)
• Aluminium Conductor 750 MCM
• EPR (Ethylene Propylene Rubber) Insulation
• Easy Strippable Insulation Shield
• Application – Medium voltage primary underground distribution cable for conduit systems, direct burial, underground cable duct
• Manufacturer – CME Mexico (CME Wire and Cable, Inc. was established in the USA in 1994 as a subsidiary of Viakable to serve customers in the US and Canada).

How To Remove Fabric Layers From MV HV Power Cables

David Lundin (Contractor Compliance Specialist at Western Power) – remove the cable fabric layer by gloved hand and clean away residual material with carbon tetra chloride or equivalent cable cleaners.

Erik Liljedahl (Site Intallation Manager on NKT HV High Voltage Cables) – carefully remove the band with a knife, be careful not to damage the cable conductor strands, then brush the conductor with a wire brush. This fabric is to prevent the inner semi-conductor to fall between the conductor strands during cable production and allows the XLPE insulation to move during heat treatment – this fabric is usually a present layer on 100kV-600kV cables but also 11kV-33kV.

Peter Hembry (Director at Hembry High Voltage Services) – unravel to the primary insulation and pull it against the blade of a sharp knife all the way around, then give it a quick lick of heat to catch any strands you may have missed.

Ben Lanz (Director, Applications Engineering at IMCORP) – unless this is an unusual cable design, the inner semi-conductor (conductor shield) layer should come off cleanly. Any residue can be typically wiped off with a lint free cloth. After you wire brush the aluminium oxide off the conductor and immediately apply the oxide inhibitor, you will be ready to apply the connector (either compression or mechanical shearbolt). If you are not familiar with MV and HV cable in general, I recommend jointer/splicer training.

Mark Jones (Renewables Marketing Manager at Synergy Cables USA Ltd) – box cutter with a new blade works well. Cut slowly while keeping tension by rolling it under itself.

David Tompsett (Project Engineer at Northern Ireland Electricity) – seen this conductor screen removed by using twine instead of a knife. Good clean edge and no risk of damage to the outer conductor strands of the MV-HV cable.

Glyn Moore TMIET (Electrical Tech / Construction Manager) – as previous comments to remove the fabric either under or over wrapped once you are square with your insulation pull the fabric onto a sharp blade away from conductor, bit of a flame from a heat shrink torch to remove loose fibres. 

Darren Street (Cable Jointer at D+R Jointing Services Ltd) – sharp knife and a trained cable jointers touch (also blow it over with a gas torch to catch any wayward strands).

Ciaran McDowell (HV / LV Authorised Cable Jointer) – used it on high voltage tails in medium/high voltage transformers a few years ago. Use a sharp knife like a Stanley and pull the fabric under tension against the blade. This worked well just leaving a few threads to trim off. 

Eoin MacQuaile (Junior Quantity Surveyor at Obelisk) – use a piece of twine and wrap it around the cable material and use a saw-like motion to heat and cut the fabric without scoring the aluminium. This method evenly cuts insulation and wrapping without damaging conductors.

Kevin Kruse (Vice President, Engineering and Technical Support) – I have completed many cable termination demonstrations and we were always made fun of because we used string, but this is safest method. Second is some of the tools like Speed Systems or Ripley Jointing Tools where you can set a safe depth just shy of the conductor diameter. Cable jointers should never use a knife or box cutter.

Tim Poirier (HV Systems Manager- North America TE Connectivity) – best method is to tear it and then using a cable splicing knife at the cut back tearing it against the blade being careful not to nick the aluminium if any strands of the fabric remain burn off with a heat shrink torch.

Justin Kelly (Underground Network and Cable Splicer at JEA) – knife work, the cornerstone of legitimate medium voltage cable splicing and jointing. This is why splicing has historically been taught in 4-5 year apprenticeships, not 6 week classes. Skill takes time.

Stephen Davies (Technical Policy Engineer – Western Power Distribution) – this should be pulled against a static knife edge by the cable jointer so as to not damage the aluminium conductor. It is a semiconductor woven tape that prevents the semicon extruded layer bedding between the aluminium strands.

➡ String is simple but effective for clean cutting without damaging underlying cable conductors.

MV HV Power Cables

Primary Underground Distribution MV Medium Voltage Cables

• Primary UD MV Cable TR-XLPE / LLDPE, Concentric Neutral
• Primary UD MV Cable EPR / LLDPE, Concentric Neutral
• Primary UD MV Cable TR-XLPE / PVC, Concentric Neutral
• Primary UD MV Cable EPR / PVC, Concentric Neutral
• Primary UD MV Cable PILC Replacement, EPR/PE
• Primary UD MV Cable TR-XLPE Insulated, Concentric Neutral
• Primary UD MV Cable EPR Insulated, Concentric Neutral

High & Extra High Voltage Cables & Cable Systems

• High Voltage Copper Cable, Smooth Aluminum Shield/Sheath, XLPE Insulation, HDPE Jacket, 69kV – 138kV
• High Voltage Copper Cable, Wire and Tape Shield, XLPE Insulation, HDPE Jacket, 69kV – 138kV
• High Voltage Aluminum Cable, Smooth Aluminum Shield/Sheath, XLPE Insulation, HDPE Jacket, 69kV – 138kV
• High Voltage Aluminum Cable, Wire and Tape Shield, XLPE Insulation, HDPE Jacket, 69kV – 138kV
• Extra High Voltage Copper Cable, Smooth Aluminum Shield/Sheath, XLPE Insulation, HDPE Jacket, 230kV
• Extra High Voltage Aluminum Cable, Smooth Aluminum Shield/Sheath, XLPE Insulation, HDPE Jacket, 230kV

T&D are UK Main Stockist for Alroc Tools suitable for all types of LV MV HV cable preparation prior to installing cable joints, terminations and separable connectors.

International standards and local practices vary considerably, here a Indian cable jointing team are shown using knives and hacksaws to remove cable sheath jacket and primary insulation from Prysmian 220kV to 550kV EHV cables. Image: Audhesh Giri (EHV Cable Jointer/Cable Supervisor)

Here a smooth finish to the XLPE insulation on a high voltage power cable has been achieved with use of a Makita sanding machine

THORNE & DERRICK are national distributors of LV, MV & HV Cable Installation, Jointing, Duct Sealing, Substation & Electrical Equipment – we service UK and global businesses involved in cable installations, cable jointing, copper earth tapes and substation earthing at LV, 11kV, 33kV and EHV.

Based in the UK, are the Specialist Distributor for the Nexans Power Cable Accessory range of Screened Separable Connectors (Euromold), Cold-Applied (AIN AFN) & Heat Shrink Joints (JTS) & Cable Terminations (MONO) for Medium Voltage Power Systems up to 66kV; we hold extensive stocks and provide the most competitive commercial and technical levels of customer service in the UK.