Secure Conductor Material Transition From Aluminium To Copper
PFISTERER Sicon offer a range of mechanical shearbolt cable connectors with stepless shear-off bolts providing the right connector for any termination application for medium voltage power cables up to 66/72kV.
For years now, bolted clamps, connectors and cable lugs have been gaining ground as bolted connectors offer technical and practical advantages that conventional cable crimping and compression technology such as copper tube lugs cannot match.
With the Sicon CopperTop range of electrical connectors PFISTERER connects both the well-known SICON technology and the material transition from aluminium to copper in one cable lug. At the same time the copper/aluminium material transition is shifted to an area that easily can be covered with a heat shrink tube and can be secured against environmental impacts.
This allows for example a safe and corrosion resistant connection to copper bus bars, especially in outdoor use. Additionally, the SICON CopperTop 332 907 082 is an alternative for connections in elbow connectors from aluminium cable to copper connection elements.
SICON technology
Like all other SICON connectors the CopperTop can be used independently of the conductor material and type*. The special aluminium alloy allows a safe and corrosion resistant connection of both aluminium and copper material with perfect electrical characteristics.
Thanks to the patented SICON step-less shear off bolts, optimal contact force is always achieved and avoids mounting failures.
SICON CopperTop Benefits
Al/Cu transition in the cable lug
Safe and reliable connection of copper connection elements, especially in outdoor use
Proven SICON technology
Material transition easy shrinkable
Reliable connection for all conductors
Optimal contact force for all conductors
No damage to individual strands
Installation with standard tools
Conductor type
Cross section aluminium conductor
Cross section copper conductor
mm² (mm)
AWG / kcmil (inch)
mm² (mm)
AWG / kcmil (inch)
SM 120° / sector stranded 120°
185 (240 rounded)
185 (240 rounded)
185 (240 rounded)
SE 120° / sector solid 120°
185 – 240
SM 90° / sector stranded 90°
185 – 240
185 – 240
185 – 240
SE 90° / sector solid 90°
185 – 240
RE / round solid
185 – 500 (Ø 14,5-25,1)
350 – 1000 (Ø 0.59“-0.99“)
185 – 500 (Ø 14,5-25,1)
350 – 1000 (Ø 0.59“-0.99“)
RMV / round stranded and compressed
185 – 400 (Ø 15,3-24,6) 3
350 – 800 (Ø 0.65“-1.01“)
185 – 400 (Ø 15,3-24,6) 3
350 – 800 (Ø 0.65“-1.01“)
RM / round stranded
185 – 400 (Ø 17,0-26,1)
350 – 800 (Ø 0.67“-1.03“)
185 – 400 (Ø 17,0-26,1)
350 – 800 (Ø 0.67“-1.03“)
THORNE & DERRICK
Thorne & Derrick stock and distribute PFISTERER CONNEX Connectors for medium / high voltage cable connection and termination to electrical systems up to 33kV – we provide competitive prices for PFISTERER CONNEX connectors used to terminate and connect polymeric insulated MV-HV cables into gas insulated switchgear and electrical equipment from extensive UK stocks.
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 cable systems:
The SEANEX inner cone solution is an offshore variant of the successful Connex HV connection system that is specially adapted for 66kV inter-array cabling.
Bolt Cutting Tools
The Klauke bolt cutter for container seals redefines the cutting standard with an ergonomic, high security solution. Klauke understands that as the logistics industry changes,
so do your needs. Therefore, a battery powered bolt cutter has been designed for easy operation and smoother working.
Battery operated cable crimping toolsare made from the highest quality materials, rust proof and surface finished with a reputation for providing a long service live, consistently delivering safe electrical cable crimping connections for low and high voltage applications.
High Security Bolt Cutter for Container Seals & Locks
Today’s shipping industry requires the use of disposable soft-steel locks and bolt seals. Traditional methods of cutting and removing these locks poses safety risks and challenges, for example, manual tools:
Can weigh 6 Kg.
Can require 30 Kg of muscular force
Increase operator exertion and require longer recovery time
Require repetitive cutting and can cause muscle fatigue resulting in costly muscular strains, tears, injuries and surgery
Can require strenuous back, pectoral, and shoulder muscle exertion to remove bolt seals
82% Injury Risk Reduction
With Klauke’s Battery powered cutting Tools
When using Klauke’s battery tool to cut/remove high-security locks when compared to a manual bolt cutter. *Job Assessment performed with The Humantech System®
Klauke Bolt Cutters Features
Hardened Blades – Allows for increased bolt cutting longevity
350° Rotating Head – Designed to cut bolts at any angle
T&D are Specialist Distributors ofLV MV HV Cable Installation, Jointing, Substation & Electrical Equipment – we supply companies in the onshore and offshore wind, solar, rail, oil/gas, data centre, battery storage and utility sectors with products to enable the energisation, operation and maintenance of underground cables and overhead lines.
HV Joints Terminations Connectors | 11kV/33kV up to 66kV Ex Stock
Cable Hooks | Cablesafe | UK Stockists & Suppliers
Cable Safety Hook Extreme
Cable Management for Temporary Electrical Cables
CableSafe Safety Hooks are used in cable management while conducting maintenance, turnarounds, construction works and industrial works. The Safety Hook Extreme is used as an electrical safety product to suspend cables and hoses of the work floor.
Multinationals prescribe the use of Safety Hooks in company procedures to adhere to the highest safety practices.
CableSafe Cable Hooks are ‘S’ shaped plastic cable hangers made from GRP (glass reinforced polyester) which are used to support, suspend and retain all types of electrical cables (LV-HV power, control, instrumentation), welding cables, temporary lighting extension cords and hoses in the offshore energy, data centre, marine, petrochemical, mining, rail, chemical and power industries.
Safety Hook Extreme
The Safety Hook Extreme is an advanced specification and high performance version of the standard industrial cable hook manufactured with glass reinforcedPBT and is UV stabilized, Flame Retardant(Class: 94V-0, Flame Class Rating 3) and Cold Weather rated.
Safety Hook Extreme
While the Safety Cable Hook is a high quality product, CableSafe engineering team found a way to improve it. That is why we are proud to introduce our new Safety Hook: the Safety Hook Extreme. The development of this Safety Hook Extreme is done in cooperation with a Norwegian oil & gas multinational.
The Safety Hook Extreme is manufactured with glass reinforced PBT and is UV stabilized, Flame Retardant (class: 94V-0, Flame Class Rating 3) and Cold Weather rated.
British Standard recently adopted the Requirements for Electrical Installations [BS7671:2018] for the electrical design industry. This standard is developed after the death of two firefighters at Harrow Court, Hertfordshire, in 2005.
The two firefighters got entangled as a result of the collapse of an electrical installation during a fire. The implemented standard states that it requires cables to be adequately supported against their premature collapse in the event of a fire. Installations designs from 2019 onwards have to comply with this new standard. This has implications for personnel involved with design, erection and verification of electrical installations. The Safety Hook Extreme is developed with this standard in mind.
OSHA
The Occupational Safety and Health Administration (OSHA) is an agency of the United States Department of Labor. OSHA claims that fire safety must be everyone’s job at a worksite.
Employers should train workers about fire hazards in the workplace and on what to do in a fire emergency [OSHA Part 1926.150, Subpart F].
During a fire hazard it is of vital importance to suspend cables and hoses of the work floor to prevent slip, trip and fall accidents. That is why we made the Safety Hook Extreme flame retardant.
CPR
In the European Union (EU), the product ‘cable’ was added to the Construction Product Regulation (CPR) in 2017. Thereby, creating an obligation to classify cables according to fire
behaviour in order to be able to market them in Europe for use in buildings [NEN8012:2015]. The EU recognises the danger of fire due to unsafe cables. Cables must be flame retardant,
so should Safety Hooks be.
Different Sizes
The Safety Hook Extreme is available in 4 sizes: 15 inch which holds 265 kg, 12 inch which holds 190 kg, 9 inch which holds 55 kg and 6 inch which holds 40 kg static load. The Safety Hook Extreme colour is yellow, as this is often used in safety equipment.
CableSafe Cable Hooks
Cable Hooks features & Specifications
CableSafe safety hooks are available in four sizes 6, 9, 12 and 15 inches and can carry loads of up to 650g (1.43lbs) – cable hooks are fire retardant, non-conductive and have very high UV resistance ensuring long service lifetime of over 25 years of active use in heavy industries.
A hole in each end of the hook enables the user to secure and fix the cable hook itself by means of a cable tie wrap – cable hooks are suitable for bundled cables.
CableSafe S-hooks help with cable management & housekeeping
S-hooks are easy to use, cables & wires are cleared quickly
Four sizes: 6”, 9”, 12”, and 15” [approximately 15, 23, 30, 38 cm]
Easily secure loads using a tie-wrap through holes in end of the cable hook
S-hooks do not conduct electricity or heat
Durable: over 25 years of active use in heavy industries
Cable hooks are sold in batches of 25 pieces – minimum order – delivered from stock
For quantities of 500 pieces or more (per type) it is possible to receive the hooks with the company name engraved in the cable hook or in a special colour. Production time 3 to 4 weeks.
Selection of Cable Hooks
The CableSafe® Safety Hooks are available in 4 sizes
Yellow | Glow-in-the-dark (Minimum order quantity 25 hooks)
White | Black | Blue | Green | Red (Minimum order quantity of 500 hooks)
CABLE SAFETY HOOKS & EQUIPMENT
OSHA maintains general industry regulations on walking and working surfaces that guard workers against hazards and the risk of injury including clutter, protruding objects and wet conditions. These Health & Safety hazards can harm everyone in a facility, regardless of title or job responsibilities.
Slips, trips, and falls cause nearly 700 fatalities per year and many more injurious accident in the workplace according to the Bureau of Labor Statistics. The CableSafe range of products ensure all cables, wires and hoses are suspended off the ground especially in high traffic work areas such as production floors, machinery spaces and deck level areas where maintenance is being carried out.
CableSafe Safety solutions are critical cable essentials and are well proved construction safety products.
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, substation earthing, 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, Cubis Elastimold, Ellis Patents, Emtelle, Euromold, Filoform , Furse, Lucy Electric & Zodion, Nexans, Pfisterer, Polypipe, Prysmian, Roxtec, Sicame, WT Henley.
The connectors manufactured by Euromold are provided with a capacitive test point: the voltage detection point (VD point). This enables a local check to confirm that the product is de-energised prior to disconnection (use a high resistance test device – approx. 250 MΩ).
The capacitive test point consists of a metallic insert, moulded into the insulation and electrically connected to a convenient external terminal.
➡ Thorne & Derrick can support the specification and supply of the correct MV HV connector– heat shrink, cold shrink and push-on joints and terminations are also available, contact us with your requirements or technical queries.
Thorne & Derrick have an International Distribution Agreement with Nexans Power Accessories UK and are their main stockists and suppliers for their range of Heat Shrink Joints & Terminations up to 33kV as well as their Euromold connectors.
Under normal operating circumstances this terminal is earthed by its conductive rubber cap. The cap must be removed prior to testing. When applying the test device, a capacitive potential divider is effectively established.
The components of which are:
Ctc: between test point and line potential
Ctg: between test point and earthed conductive screen
Cm: representing the capacity of the detection apparatus
The voltage available at the test point is directly proportional to the line voltage depending on the capacitance ratio. Although relatively high voltages can be present on the test point after removing the conductive cap, the overall available energy is minimal and any potential would disappear instantaneously if accidentally touched by an operator or other personnel. The current transfer would be a fraction of a micro Ampere and imperceptible to human touch.
Key:
Key Conductive rubber cap
Metallic insert (capacitive test point)
EPDM conductive screen (earth potential)
EPDM insulation
EPDM internal screen (line potential)
Metallic insert (line potential)
Separable Connectors
Euromold 152SR – 158LR 400LR
The Euromold152SR straight connector with 250A current rating is designed for Interface A and covers voltages from 12kV to 24kV with a maximum conductor size of 95sqmm.
The Euromold 480TB tee connector with 630A – 1250A current rating is designed for Interface C and covers voltages from 12kV to 42kV with a maximum conductor size of 300sqmm.
The Euromold 909TB tee connector with 250A current rating is designed for Interface F and covers voltages from 12kV to 42kV with a maximum conductor size of 1200sqmm.
Euromold 909TB plug-in tee connectors can be supplied as a coupling connector (909PB) and compatible with plug-in type epoxy bushings– all suitable for use with Interface F type bushings on SF6 gas-insulated switchgear.
Nexans Cable Accessories
Nexans manufactured Cable Accessories are in extensive service throughout the UK DNO power grid – the Euromold connectors are approved and are approved by several DNO/IDNO operators dependent on the product, voltage and network.
The JTS Joints and MONO Terminations are increasingly preferred and adopted by NERS Accredited Independent Connection Providers (ICPs) working on 11kV private networks.
Euromold Connectors
Properties of EPDM & Silicone Rubbers
For approximately 40 years Euromold has been formulating and moulding rubber compounds. The knowledge and skill gained over this extensive period has overcome many obstacles and are a great asset for the future of the brand and the Euromold connectors.
The resultant hydrocarbon-based elastomers have all advantages of general purpose rubbers but its performances excel in electrical strength and resistance to environmental conditions.
Thorne & Derrick have an International Distribution Agreement with Nexans Power Accessories UK and are their main stockists and suppliers for their range of Heat Shrink Joints & Terminations up to 66kV as well as their Euromold connectors.
OZONE/CORONA RESISTANCE
The outstanding resistance to corona is due to the ability of the EPDM rubber to withstand ozone and other chemical compounds formed by discharges and its resistance to heat.
CHEMICAL RESISTANCE
Products made from EPDM rubber resist attacks made by many acids, alkalis, detergents, phosphates, esters, ketones, alcohols and glycols. They give particularly outstanding service in the presence of hot water and high pressure steam. Like all hydrocarbon-based elastomers, EPDM is not resistant to hydrocarbon solvents and oils or chlorinated hydrocarbons.
RADIATION RESISTANCE
EPDM connectors are also installed in nuclear containment areas.
RESISTANCE TO MECHANICAL ABUSE
EPDM rubber has good resistance to compression, cutting, impact, tearing and abrasion over a wide temperature range.
ELECTRICAL PROPERTIES
Typical Values
EPDM Connectors
Silicone
Insulation
Conductive
Insulation
Dielectric strength (kV/mm)
33
–
24
Dielectric constant
2.7 to 3.1
–
2.6
Dissipation factor (x 10-3)
2.5
–
4
Volume resistivity at 20 °C (Ohm-cm)
1014
50
1015
OTHER Euromold PROPERTIES
Typical Values
EPDM Connectors
Silicone
Insulation
Conductive
Insulation
Specific gravity (kg/dm³)
1.33
1.12
1.15
Tensile strength (N/mm²)
4.8
11
8.5
Shore hardness (Shore A)
65
80
47
Elongation (%)
400
450
700
Abrasion resistance
good
excellent
poor
Heat ageing
good
good
good
Temperature range (°C)
-60 to +130
-60 to +130
-80 to +200
Resistance to:
-U.V.
good
good
good
-Ozone
excellent
excellent
excellent
-Sunlight
outstanding
outstanding
outstanding
-Water absorption
very good
very good
excellent
-Solvent
poor
poor
poor
-Hydrocarbon oil
poor
poor
good
-Silicone oil
good
good
poor
RESISTANCE TO THE ENVIRONMENT
EPDM rubber has properties comparable with the best speciality elastomers in resistance to weather. Accelerated life and salt spray tests suggest excellent properties which have been proven in practice by more than 40 years experience in widely varied applications all over the world. Silicone rubber has outstanding long-term resistance to weather in aggressive environments (industrial, coastal and desert climates).
RESISTANCE TO WATER
Water has little effect on the properties of EPDM hydrocarbon rubber. Even long immersion in hot water results in minimal loss of tensile strength. Tests also show a very low degree of water absorption. Silicone rubbers retain their surface hydrophobicity which is a considerable advantage for outdoor applications.
INTERNATIONAL PROTECTION CLASS
By design, Euromold connectors are protecting live elements of the connection against ingress of dust and water. The protection class per IEC 60529 is IP67.
PROPERTIES OF SILICONE LUBRICANT
The high viscosity silicone grease has been chosen for both its lubrication and dielectric properties. It is used as a lubricant when installing all premoulded rubber accessories on epoxy bushings as well as on the core insulation of dry cables.
Its selection is the result of several years of evaluation by Euromold of many types of silicone grease. Silicone grease displays a high level of long-term lubricating stability avoiding any ageing effects (e.g. the risk of sticking).
It also offers excellent dielectric properties assuring good performance at high voltage interfaces. In addition, the grease contributes in making interfaces watertight. It is completely compatible with all premoulded rubber accessories as well as with polymeric insulated cables.
USES
Use of this grease has proven to be of value in the installation of accessories in series and for operations such as greasing interfaces after disconnection. The installation instructions included in each product package detail clearly the application of the silicone grease.
ELECTRICAL STRESS
ELECTRICAL STRESS IN CABLES
The design and construction of screened power cables is primarily based on two types of electrical stress – a radial stress which can be represented by flux lines and a longitudinal
stress on the surface of the insulation where the screen has been removed. (Fig. 1).
ELECTRICAL STRESS RELIEF
When the semi-conductive screen is cut, the electrical field distribution changes radically. The surrounding air and the dielectric material in the vicinity of the cut screen become overstressed (Fig. 2) and breakdown of the cable will soon occur. To avoid this, we control the equipotential lines by installing a termination with a stress cone (Fig. 3), a termination
with linear stress relief (Fig. 4) or a separable connector (Fig. 5) at the end of the screen.
The terminations will make sure that equipotential lines are sufficiently far apart when they finally emerge into the air and that they will not cause ionization. The separable connector keeps the equipotential lines inside the cable/connector assembly in a controlled way. This stress relief is automatically built into all the accessories by the precision moulding of conductive and/or insulating EPDM/silicone rubber.
Nexans Cable Accessories
Nexans manufactured Cable Accessoriesare in extensive service throughout the UK DNO power grid – the Euromold connectors are approved and are approved by several DNO/IDNO operators dependent on the product, voltage and network.
The JTS Joints and MONO Terminations are increasingly preferred and adopted by NERS Accredited Independent Connection Providers (ICPs) working on 11kV private networks.
Celebrating Charlie & Ella’s Level 4 Sales Executive Apprenticeships At Thorne & Derrick International, we are proud to champion talent development and recognise the dedication required to achieve professional growth. We are therefore delighted to congratulate Charlie Baines and...
Thorne & Derrick will be Exhibiting at Solar & Storage Live UK 2026 at the NEC Birmingham from 22nd–24th September, showcasing our support for HV Cable Accessories, Joints, Terminations, Separable Connectors, Cable Tooling and Grid Connection Products used across...