Remove Cable Insulation – Cable Jointing Tools For Stripping LV MV HV EHV Insulation

Alroc Tools – Cable Jointing Tools (MV HV)

Cable Jointing Tools For Stripping Cable Insulation

Alroc cable tools are used by MV-HV jointers to remove cable insulation and provide excellent cable preparation prior to the installation of joints, terminations or connectors using cold shrink, heat shrink or push-on type technology.

Alroc tools strip or remove outer cable sheath, semi-con screen and cable insulation from medium-high voltage cables: this includes polymeric insulated cables such as XLPE, EPR, PVC, PE. The cable insulation contains the voltage within the LV MV HV cable systems and are usually either extruded solid dielectric or laminar (oil paper or varnish cambric).

• Cross Linked Polyethylene XLPE
• Ethylene Propylene Rubber EPR
• Polyethylene

Alroc BRMRD1E | the conventional polymeric insulation stripping tool for use with XLPE insulated cables providing a straight and neat cut prior to jointing and terminating MV HV cables.

Alroc MF240 | this modern generation Multi-Function tools used by MV HV jointers to prepare cables prior to jointing or terminating: this jointers tool removes both outer jacket sheath and XLPE insulation.

BS Cable Standards

• BS6622 BS7835 IEC60502 – 6.35/11kV & 19/33kV Cable (Single & 3 Core) XLPE Insulation
• BS7870 4.10 – 11kV & 33kV Utility Power Cable XLPE Insulation
• BS6883 – Marine & Offshore EPR Insulated Cable

European Cable Standards

The video shows the Alroc BRMRD1 insulation removal stripping tool in use by cable jointers removing the XLPE insulation to prepare the cable ready for the installation of cable joints, terminations or connectors – typically used at medium/high voltages 11kV and 33kV and insulation diameter applications 14 – 40mm.

Remove Cable Insulation

The cable insulation provides electrical insulation to the conductor at voltage from the outer screens at ground potential – the insulation will be of sufficient thickness to withstand the electric field under the rated and transient operating conditions.

XLPE insulation is a natural colour, EPR is white (lead-free) or red/pink (contains red lead oxide as a stabiliser).

Cable Tools – 11kV & 33kV Jointing Tools For MV-HV Cable Preparation

Jointers Tools

MV HV EHV

• MV Medium Voltage Cables 11kV 33kV
• HV High Voltage Cables 66kV
• EHV Extra High Voltage Transmission & Distribution Cables 132kV 245kV 400kV

➡ For further information about Alroc cable tools for removing cable insulation from MV-HV cables please see below.

Thorne & Derrick also distribute Cembre tools for cable cutting and cable crimping of copper and aluminium conductors.

Cable Insulation

Grinding, Polishing & Cleaning

To avoid air gaps where discharges can occur, the cable insulation surface must be smooth – jointers can use cut strips of grinding (abrasive) paper. This polishing process must be carried out carefully to avoid damage to the cable insulation screen. Jointers should thoroughly clean the cable insulation using an approved cable cleaner and using a motion of travel towards the insulation scrren. Never use the same side of a cleaning tissue twice and the insulation must be clean of conductive particles and dirt.

Jointing & Preparation Tools For Cable Jointers & Linesmen Working On MV-HV-EHV Cables & Lines