Cable Joints & Terminations HV

Fire Resistant Blanket – Protecting LV MV HV Cables & Joints Against Fire

Fire Resistant Blanket – Nexans NX-FIRE

• by Chris Dodds T&D - estimated reading time 2 minutes 

Nexans

Nexans Fire Resistant Cable Blanket is a cable joint protection cover with belts designed to be used with LV, MV or HV joints and cables in applications where low smoke emission and resistance to fire is needed. The Nexans Fire Protection Kit is designed for easy installation due to the belt design, open shape and “wrap-around” installation application.

The fire resistant cable blanket is designed with different layers of material to withstand high temperatures and is suitable to protect low, medium and high voltage cables from the destructive effects of fire. No specialist tools are required to install the fire blanket – simply manually lift, tighten and fasten the lightweight blanket onto the cables.

All materials included in the Nexans Fire Protection Kit are classified as low smoke emission and halogen free.

Protecting LV MV HV Cables & Cable Joints Against Fire

Nexans NX Fire blanket has been approved by ENEL and is available in different sizes and lengths upon request to suit cable outside diameters 20-300mm.

Nexans NX Fire – Technical Data

*Special version for transition cable joints. Available upon request

Fire Resistant Blanket – Application

1. Position the fire resistant blanket at the centre of the cable joint or cable	2. Wrap the fire resistant cover around the cable joint or cable	3. Tighten the belts to ensure that the fire protection blanket is held firmly in place onto the LV-MV-HV cable

Onshore or Offshore

Used to protect both onshore and offshore cables, including offshore cable joints where marine and offshore cables and joints in fixed installations for power circuits, emergency lighting systems and fire alarm systems must provide continued service in fire conditions.

The product is cold-applied without need to resort to “hot-work” permit applications to carry out cable repair, jointing or protection in potentially explosive atmospheres or hazardous area locations.

Underground Or Overground

Suitable to provide fire protection to fire hazard safety cables in the rail industry – including sub-surface, tunnels or station level including power cables for low voltage lighting, fire detection, emergency, signalling and auxiliary circuits.

International Standards

The fire resistant blanket has been tested according to the following international standards:

• IEC 60332-3-22 cat. A (fire propagation test)
• IEC 60331-11 & 21 (fire resistance test)
• BS 6387 cat. C (fire resistance test)
• IEC 61034-1&2 (low smoke emission)
• BS EN50268-2:2000 / BS 6853:1999 Annex B.2 (Low Smoke and Toxic emissions)

NEXANS CABLES & ACCESSORIES

To support the installation of MV-HV cables, T&D distribute the Nexans Power Cable Accessory range – this includes heat shrink terminations and cold shrink cable joints and the Euromold range of screened separable connectors extensively installed to terminate MV-HV power cables.

• Slip-on Cable Terminations
• Cold-shrink Cable Terminations
• Heat-shrink Cable Terminations
• Cable Joints – Heat & Cold-shrink
• Separable Connectors (Euromold)
• Surge Arresters & Switchgear/Transformer Bushings

MV-HV Cable Joints, Terminations & Connectors suitable for connecting, repairing and extending 11kV and 33kV high voltage power cable circuits.

THORNE & DERRICK are national distributors LV, MV & HV Cable Installation, Jointing, Substation, Earthing & Lightning Protection & 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.

3M Scotchcast Cable Joints | Ellis Patents Cable Cleats | CMP Cable Glands

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.

T-Plug Cable Connectors – 33kV Medium Voltage Switchgear Connectors For Siemens NXPLUS C

Siemens – Gas Insulated Switchgear For Secondary Distribution MV Medium Voltage Power Systems Up To 33kV

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

Thorne & Derrick International, based in the UK, are a leading distributor of cable accessories and connection systems for 33kV cables – this includes heat shrink/cold shrink joints, terminations and EPDM type screened separable connectors manufactured by Nexans Euromold.

The following information enables the specification and selection of the correct 33kV cable plug type termination or connector to suit medium/high voltage power cables used with Siemens NXPLUS C Wind switchgear.

Specifically, we confirm the current approved 33kV cable connectors for use with Interface C 33kV Bushings on gas insulated switchgear.

33kV T Plug Type Cable Connectors

The following information table enables the selection and outlines the possible cable connection types (T-Plugs, Coupling Insert & Screened Separable Connectors) and MV surge arresters compatible with Siemens NXPLUS C Wind switchgear 33kV/36kV.

Screened cable T-plugs, also known as separable connectors, are specified to terminate and connect 33kV power cables into Siemens NXPLUS C gas insulated switchgear – the external semi-conductive layer must be earthed normally via a cable connector.

Insulated cable T-plugs (without semi-conductive layer) are not permissible – this type of MV cable plug or connector is prone to partial discharge due to the proximity to earthed parts of the switchgear. Partial discharge destroys the MV cable connector causing an arc between phase and earth.

The connection of conventional 33kV cable sealing ends or terminations via elbow adapters is not permissible either as this type of medium voltage power system is also insulated but not screened (no external semi-conductive layer).

1) Observe the actual short-circuit and current carrying capacity of the cables and sealing ends

1) Observe the actual short-circuit and current carrying capacity of the cables and sealing ends 

33kV Cables

Cable T-Plug Connectors

The following table outlines the screened separable connector, also referred to as cable sealing ends, suitable for 33kV/36kV cables according to IEC 60502-2 and VDE 0276-620.

The cable T-plug connection types are suitable for medium voltage bushings with outside cone as Interface C Type Bushings according to EN50181 for 33kV cables with conductor cross-section up to 800sqmm copper/aluminium.

N2XSY XLPE PVC – 18/30 (36)kV Cable Connectors

33kV Surge Arresters

Surge arresters for pluggable onto cable T-plugs and are recommened for MV-HV cable and power systems:

• if the 33kV cable is directly connected to the overhead line
• if the protection zone of the 33kV surge arrester at the end tower of the overhead line does not cover the high voltage switchgear
• in offshore wind farms

* protrudes into the floor area; possible depending on the local conditions, e.g. with sufficient hole depth

** depending on the cable plug type – contact T&D to discuss possible combinations of cable connection types and surge arresters in NXPLUS C Wind up to 36kV.

➡ View complete range of Surge Arresters 11kV 33kV MV HV 

Screened separable connectors and surge arresters must be provided by the same manufacturer and used only with one cable connected per 33kV phase. Some types of surge arresters exceed the permissible dimensions as outlined in the table above.

Ellis Patents | Nexans | ABB Furse | Prysmian | Pfisterer – Distributors

Credit Nexans – contact us for HV Cable Joints, Terminations & Connectors 

Credit ABB – Joint, Terminate & Connect Medium & High Voltage Cables

Thorne & Derrick

T&D are UK distributors and worldwide exporters of Cable Installation, Cable Jointing, Duct Seals, Substation & High Voltage Electrical Safety Equipment – we service UK and global businesses involved in cable installations, jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Since 1985, T&D have established a solid reputation based on Service, Integrity and Trust – contact us with your enquiry.

Selecting MV Bushings & Cable Connectors For Use With Schneider Switchgear (Medium Voltage)

Schneider Gas Insulated (SF6) Switchgear, RMU’s & MV Medium Voltage Electrical Equipment

• Uploaded by Chris Dodds – reading time 8 minutes

Switchgear Bushings & Cable Connectors

The following information has been provided to enable to correct selection and specification of MV Bushings and Separable Connectors used to connect and terminate medium/high voltage power cables into Schneider RM6 gas insulated switchgear and Ring Main Units (RMU) up to 24kV.

General

• The profiles, contacts and dimensions of the Schneider RM6 connection interfaces are defined by the IEC 60137 standard
• 100% of the epoxy resin interfaces undergo dielectric testing at power frequency and partial discharge tests
• Insulated connectors must be used in order to guarantee the dielectric performance

Appropriateness For Use

Types of Connection Interface

The bushings carry the electrical current from the outside to the inside of the MV switchgear enclosure, which is filled with SF6 gas, ensuring insulation between the live conductors and the frame for MV power distribution.

There are 3 types of MV bushing, which are defined by their short-time withstand current:

• Type A Interface Bushing: 200 A: 12.5 kA 1 s and 31.5 kA peak (plug-in)
• Type B Interface Bushing: 400 A: 16 kA 1 s and 40 kA peak (plug-in)
• Type C Interface Bushing: 630 A: 25 kA 1 s, 21 kA 3 s + 62.5 kA peak (disconnectable M16)

➡ For further information on Euromold Connectors for all other Interface Bushings up to 66kV please see the following information:

The Euromold brand of MV Cable Connectors manufactured by Nexans for 11kV 33kV 66kV connection of medium/high voltage power cables into gas insulated electrical equipment.

How To Define The Cable Connectors Interface

The connection interfaces depend on specific criteria, such as:

Installation

• Current rating of the connected equipment: 200, 400, 630 A
• Short-time withstand current for 12.5 kA, 16 kA, 25 kA switch and circuit breaker functions
• For the fuse-switch combination function, as the short-circuit current is limited by the fuse, the connection interface will be of type A (200 A)
• Minimum phase expansion length
• Connection type: plug in: multicontact ring, disconnectable: bolted
• Output position: straight or elbow connectors

MV Medium Voltage Cable

• Specified voltage: of the cable, of the network
• Type of conductor: aluminium or copper
• Cross section in mm²
• Primary insulation diameter
• Cable composition: single-core or 3-core
• Insulation type: dry, paper impregnated (non-draining type)
• Type of screen: copper tape or copper wire screen
• Armour: SWA (steel wire armour), AWA (aluminium wire armour) or unarmoured (copper wire screened)

Gas Insulated Switchgear – Schneider RM6

1. Stainless steel tank filled with SF6 gas, sealed for life and containing the medium voltage (MV) busbar and all live switching components such as the switch-disconnector, earthing switch, the fuse switch combination or the MV circuit breaker
2. One of the five cable compartments with interfaces to connect to the network or medium voltage transformer
3. User interface with single line diagram, actuators and LV components
4. Manual or motorised operating mechanism compartments
5. Earthing circuit with visible earthing contacts

Type A Bushing – Directed field plug-in connector

Dry single-core cable

➡ Further information link: Elastimold Connectors

Type A/M8 bushing – Non-directed field disconnectable connector (*)

Dry single and 3-core cable

(*) 520 mm plinth must be used

Type B bushing Directed field plug-in connector

Dry single-core cable

Type C bushing – Directed field disconnectable connector

Dry single-core cable

Non-directed field disconnectable connector

Dry single and three-core cable

Non-directed field disconnectable connector

Single-core cable, paper impregnated, non-draining type

Non-directed field disconnectable connector

Three-core cable, paper impregnated, non-draining type

Disconnectable Connector Single-core Dry Cable &

MV Medium Voltage Lightning Arrestor

See How Thorne & Derrick & Nexans Euromold can support your MV Bushings & Connectors requirements

Thorne & Derrick International

Since 1985 Thorne & Derrick based in the UK have been specialist distributors of LV, MV & HV Cable Installation, Jointing, Substation, Arc Flash Clothing & Electrical Safety Equipment – customers include UK and worldwide contractors, specifiers, traders and end-users involved in medium and high voltage cable installations, cable jointing, substation, overhead line and electrical construction.

We are specialist stockists and distributors of 11kV-33kV Cable Joints, Terminations & Connectors from manufacturers including 3M, Pfisterer, Prysmian and Nexans Euromold in a selection of cable jointing technologies including push-on, heat shrink and cold shrink joints and cold shrink terminations.

MV HV | Medium & High Voltage Power Products, Tools, Cables & Electrical Equipment

Portable Earthing Leads – Short Circuiting Kits For HV Substations & Overhead Lines

 uploaded by Chris Dodds - reading time 5 minutes 

This following procedure from TransGrid supports the Power System Safety Rules and its requirements for Portable Earthing assembled under:

1. Making High Voltage Apparatus Safe for Work – Category 5.5; &
2. Making Overhead Lines Safe for Work – Categories 6.4, 6.5

The following describes Electrical Safety Equipment manufactured by CATU Electrical which has been approved for portable earthing of high voltage electrical conductors. This procedure also includes methods for checking substation and overhead line earthing equipment along with inspection and maintenance procedures.

Date of Issue: 26 May 2016 

Portable Earthing Leads & Systems

An earthing system is a recognised set of components to perform the function of portable earthing for medium/high voltage cables. The components are assembled into either polyphase earthing systems (usually three phase) or single phase earthing systems.

A portable earthing leads and system comprises of:
1. Line End Clamp or Clamps
2. Portable Earthing Leads
3. Earth End Clamp or Clamps
4. Short Circuiting Point (Trifurcating Plate)
5. Connecting Hardware
6. Insulating Sticks

Portable Earthing Leads & Kits manufactured by CATU Electrical are for short-circuiting of medium/high voltage power cables and conductors including 11kV/33kV and 132kV.

Prior to the issue of an Access Authority, appropriate earths must be applied to High Voltage Equipment. These are referred to as Access Authority earths under the Power System Safety Rules. Where fixed earthing switches are either not available or not suitable for the planned work, portable earths may be used. Such portable earths can be applied to:

• overhead tranmission lines
• substations
• switchboards
• underground cables

The objective of Portable Earthing Equipment is to provide a pathway for unanticipated electrical current to flow safely to earth. The current flowing through the earth causes protection systems to operate, tripping circuit breakers and so removing the source of electrical power supply.

The earthing equipment described in this procedure has been designed and tested for use with standard TransGrid conductors and fittings such as stirrups and stubs.

Electrical Safety

Electrical safety guidance about handling portable earthing equipment in substations or near transmission lines:

1. Always carry earthing equipment below shoulder level
2. Ensure that clamps and leads are kept a safe distance from any high voltage conductor
3. Assemble and inspect earthing equipment on the ground
4. Extend or prepare any earthing equipment such as shot gun sticks on the ground

CATU Electrical – Thorne & Derrick are the largest UK stockist and supplier of MV HV Electrical Safety Equipment for Substations & Overhead Lines

Portable Earths

Applying Portable Earths

Do not allow any part of the earthing system to encroach on safe approach distances.

1. Where practicable keep the portable earthing leads away from the body
2. Apply earth clamps to stirrup (if provided) or a horizontal conductor where possible
3. Avoid earth clamp application to bushing caps and to braids and
4. Position earth clamp so that tension on the earth lead is minimised

Removing Portable Earth Leads

Earthing equipment is to be removed carefully from high voltage conductors to prevent the equipment encroaching on or coming into contact with adjacent live high voltage conductors.

Discharging HV High Voltage Equipment

Where an electrical circuit could potentially discharge through the earthing system, sufficient time must be allowed between the de-energising of the high voltage conductors and the application of the portable earthing system to permit residual charge to be dissipated.

Equipment Experiencing A Fault

Any medium voltage or high voltage portable earthing equipment for overhead line or substation applications that experience a fault or over current shall be withdrawn from service immediately.

Rating

Check that the rating of the earthing equipment is appropriate for the fault level at the location at which it is to be applied. The equipment used for earthing shall have a fault withstand rating greater than that of the location in which it is used.

Information about the expected fault currents and back-up protection times at particular locations is available from System Operations staff.

Where the fault rating of the location exceeds that of the equipment, multiple earthing sets may be used to increase the rating of the earthing system:

1. In switchyards this information will be included on the High Voltage Preparation and Restoration Instruction (HVPRI);
2. On transmission lines where the fault rating of the line exceeds the fault rating of the earthing set, multiple sets of CATU MT815S earth clamps and associated earth end clamps may be used.

Equipment & Connections

Check that the earthing system is complete, i.e. that all earthing components are present.

Check that all bolted connections are tight and that any electrical connection is positive and mechanically sound. Ensure that earthing leads are sufficiently long for the proposed task.

Inspect For Damage

Ensure that the MV-HV earthing leads and equipment is in a serviceable condition. Any portable earthing equipment found to be defective shall be removed from service for repair.

Connect Earths To Earthing End Point

Connection at the earth end point shall be performed prior to any connection to a conductor.

Use Of The CATU MT-815S Clamp

The CATU MT 815S earth clamp is applied to and removed from conductors using a ‘shotgun’ application stick of appropriate length. Once the clamp is placed onto the apparatus to be earthed, the shotgun stick is removed.

Use Of The CATU MT-815E Clamp

The CATU MT 815E earth clamp is applied to and removed from conductors using the attached CATU CM4130-E insulating sticks.

Use Of The CATU MT-701 Clamp

The CATU MT-701 clamp is a V-shaped cast aluminium earth clamp that maintains contact with the conductor via a spring loaded jaw that is preset by a latching mechanism. The clamp is ‘snapped’ onto the conductor by a quick pulling action that triggers the jaw mechanism. The clamp is designed to be applied to and removed from medium/high voltage conductors using haulage and release cords.

Arming The CATU MT-701 Clamp

Lay the clamp on the ground so that the tail of the tongue points vertically upwards.

Holding the earth lead in one hand to stabilise the clamp, use the heel of your shoe to compress the tongue down against the body of the clamp until it latches. Ensure that the clamp is securely latched before handling.

Applying The CATU MT-701 Clamp

1. Pass the haulage cord over the conductor or through the stirrup by the using a sandbag
2. Arm the earth clamp
3. Hoist the clamp to the conductor using the haulage cord; then
4. Latch the clamp to the conductor with a quick pull on the cord

Removing The CATU MT-701 Clamp

1. Take the weight of the CATU clamp and lead on the haulage cord
2. Pull the release cord until the clamp releases from the conductor
3. Lower the earth clamp and lead/s on the haulage cord; and
4. Pull the haulage cord over the conductor or through the stirrup

Portable Earthing For Switchyards

Connection To Earth End Point

Earthing stubs shall be used for all earth end connections within medium/high voltage switchyards and these are generally installed on structures in the area where it is normally necessary to apply portable earths. It is important to ensure that the stub is not corroded and that it is securely mounted on the structure. Only use the CATU MT-815S clamps with earth stubs. At the earth end, the CATU MT-815S clamp can be applied with a CATU insulating stick or the CATU MT-815S application handle.

Portable Earthing Leads For Overhead Lines & Transmission

Connection to Earth End Point on Steel Tower Overhead Lines

For steel tower earthing systems, the tower itself is used as the earth point. CATU MT-847 surface penetrating clamps shall be used on painted or galvanised surfaces. When applying earth end clamps to a steel tower the clamps should be attached to a flat part of the tower structure and screwed up as tightly as practicable by hand.

Connection to Earth End Point On Wood Or Concrete Pole Overhead Lines

Pole earthing systems involves the use of both the pole earth and an independent temporary earth electrode (earth stake). The earth stake is to be positioned approximately 1.3m from the pole and driven 600mm into the ground then bonded to the pole earth using a standard portable earth lead with either CATU MT-815S clamps applied with a shotgun stick or MT-815S application handle

Portable Earthing For Switchgear

In general, indoor medium/high voltage switchgear is provided with manufacturers specific portable earthing systems. However, the dedicated earthing system provided maybe inadequate or non-functioning. The application of portable earthing systems in indoor switchgear situations is usually limited by physical clearances. The choice of MV-HV earthing system used will therefore be determined by the geometry of the switchgear involved and the practicality of applying the available portable earthing equipment within restricted spaces. Any of the earth systems covered in this procedure, when used with earth clamps approved for indoor use, can be implemented in indoor situations.

The Bridge Method is commonly used where the fault rating of the indoor switchgear is less than or equal to the 25 kA 0.5 second rating.

Portable Earthing Using The Bridge Method

Connection To Earth End Point

Earthing stubs shall be used for all earth end connections and these are generally installed on structures in the area where it is normally necessary to apply portable earths. It is important to ensure that the stub is not corroded and that it is securely mounted on the structure. Only use the CATU MT-815S clamps with earth stubs. At the earth end, the CATU MT-815S clamp can be applied with a shotgun stick or the CATU MT-815S application handle.

Use Of The CATU MT815S Clamp On Medium & High Voltage Indoor Switchgear

Clamps can be applied to stirrups and conductors. In certain indoor switchgear situations, an ‘Earth Stub’ may have been installed on the bus bar or conductor to enable the application CATU MT-815S clamps.

Use Of The Pfisterer 360333333 Clamp On Indoor Medium & High Voltage Switchgear

Known as universal angle clamps these are applied to ball stubs using a CATU CM710 E application handle. Once the earth clamp is placed onto the apparatus to be earthed the application handle is removed.

Portable Earth Clamps with Pfisterer 360333333

Screw Action Clamp – CATU MT815S
Approved Rating	40kA/0.5 seconds
Use	Line or Earth end connections for Earthing, Bonding & Bridging
Limitations of Use	Round Conductor up to 44mm in diameter, Flat Conductor from 3mm to 40mm in thickness
Drawing Number	STD-647175
Stockcode	3180437
Associated Equipment	Shotgun Stick or Hand Application Tool
Screw Action Clamp – CATU MT815E
Approved Rating	25kA/0.5 seconds
Use	Line end connections for transmission line earthing
Limitation of Use	Round Conductor up to 44mm in diameter
Drawing Number	–
Stockcode	–
Associated Equipment	CATU CM-4130-E application stick
Universal Angle Clamp – Pfisterer 360 333 333
Approved Rating	40kA/0.5 seconds
Use	Line end connections for Indoor Earthing
Limitations of Use	Haymarket 11kV
Drawing Number	–
Stockcode	Not Stocked
Associated Equipment	CM 710 E application stick
Snap Action Line Clamp – CATU MT-701
Approved Rating	40kA/0.5 seconds
Use	Line end earthing connections only
Limitations of Use	Round Conductors 20 to 40mm diameter
Drawing Number	STD-197006
Stockcode	986968 ea 986901 complete set with single leads 986893 complete set with twin leads
CATU CM 710 E Insulating Sticks
Approved Rating	Not applicable
Use	Haymarket 11kV Indoor
Limitations of Use	Must be used only with Pfisterer 360 333 333
Stockcode	Not stocked
Associated Equipment	Pfisterer 360 333 333 clamp
CATU CM 4130 E Insulating Sticks
Approved Rating	Not applicable
Use	Insulating stick for line end connections for transmission line earthing
Limitations of Use	Must be used only with CATU MT815E clamps
Stockcode	–
Associated Equipment	CATU MT815E clamps

Glossary

Trifurcated Earthing System

Single Phase, Single Lead Earth System

Single Phase, Twin Lead Earth System

Substation Earthing

Thorne & Derrick International distribute ABB Furse and AN Wallis Earthing & Lightning Protection Systems for the protection and grounding of Medium, High & Extra High Voltage Substations – this includes copper earth tapes, earth rods, copper earthing plates, clamps and ancillary items for 33kV, 66kV, 132kV and 275kV substations. For more information please see substation earthing.

AN Wallis – Copper Earth Tapes | Bars | Clamps | Rods

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.

Hivotec Tools For 66kV/150kV Cable Jointing, Stripping & Peeling High Voltage Cables

66kV Cables – Jointing Tool Recommendations

• uploaded by Chris Dodds - reading time 5 minutes
  
  Hivotec Tools | Stocked, Supplied & Distributed in UK by Thorne & Derrick
  

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Jointing 66kV cables requires special skills, special tool sets and specialist skilled Jointers – cable preparation by the HV Jointer must be accurate and perfect before the field installation of high voltage joints and terminations.

Whether installing heat shrink, cold shrink, slip-on or separable connectors, joints and terminations the removal of sheath, insulation and semicon screen must be precise and in accordance with the manufacturers jointing instructions.

Jointers preferences vary – they are usually personal and based on familiarity and the type of high voltage cables to be jointed. Leading manufacturers of jointing tools include Alroc, Boddingtons and Ripley a Utility Tool brand.

Some manufacturers, such as Pfisterer, produce their own recommended cable tool sets for use with their range of inner cone plug connector terminations on gas insulated switchgear and substations.

So we invited Chris Barker (HV & EHV Cable Jointer) to comment on his cable tool preferences for use with 66kV high voltage cables – Chris is an international class HV EHV Jointer conversant with XLPE and fluid filled joints and terminations. Competent and certified with Prysmian, ABB, Silec, Nexans, Pfisterer Ixosil, Raychem and 3M at 132kV.

Hivotec CP90 CP130

Screen & Insulation Removal 33kV/66kV Cables

“I wouldn’t say there is a specific cable jointers tool set to hold for 66kV jointing –  personally with the range of jointing tools I own I can confidently confront standard 11kV up to extra high voltage 400kV cables,” Chris comments.

“The Hivotec CP90 semicon peeling and insulation stripping tool with a cable diameter range of 40-90mm can be used to prepare both 33kV medium voltage cables and 66kV high voltage cables with bonded semicon and XLPE polymeric type cable insulation. The Hivotec CP90 provides a perfect transition between the cable insulation and bonded semicon.”

“To remove the PVC cable sheath the PG tools manufactured by Alroc provide clean circumferential and longitudinal cuts to the cable sheath without incurring damage to the cable construction – this tool can also be used to strip lead sheath covering from 33kV/66kV high voltage single core power cables. I would then use a jointers cable knife for tramlining.”

“Hivotec provide a complete range of modular MV HV Jointing Tools for the peeling and stripping of HV cables covering a diameter range from 40-185mm. The Hivotec tools are equipped with guiding rollers eliminating the requirement for greasing of cables,” adds Chris.

The cable peeling depth can be simply adjusted with the fine adjustment screw to provide smooth finish to cable insulation surface without need for additional regrinding or sanding.

• Hivotec CP90 – Peeling and cable stripping tool for a diameter range of 40–90mm (optional drive)
• Hivotec CP130 – Peeling and cable stripping tool for a diameter range of 80–130mm (optional drive)
• Hivotec CP185  – Peeling and cable stripping tool for a diameter range of 130–185mm
• Hivotec Unipower 34R – Gear transmission unit to drive Hivotec CP90 and CP130

The range of HV High Cable Jointing Tools manufactured by Hivotec – specified for the stripping and chamfering of insulation and peeling or removal of bonded semicon screens on high voltage power cables.

hIVOTEC CP90 HV Cable Tools – Main Technical Data

Spare Blades for Use with Hivotec Tools | Peeling, Insulation Stripping & Chamfering

Peeling Blades | FK-CP Cable Stripping Tool – Hivotec Tools

Insulation Stripping Blades | IK-CP Cable Stripping Tool – Hivotec Tools

Chamfering Blades | CK-CP Cable Stripping Tool – Hivotec Tools

150kV Cable Jointing Tools

Hivotec CP130 | Cable Jointing & Peeling Tool – here the high voltage power cable preparation tool is being demonstrated removing XLPE insulation from 150kV cable for an offshore wind farm project.

400kV Cable Jointing Tools

Here the Hivotec CP130 has been used to prepare a perfect EHV cable semicon cut back, high quality cable preparation installations mean minimal future O&M for cable accessories such as joints, terminations and connectors. Note the cleanliness of the cable insulation – all cables whether LV HV EHV should be carefully cleaned using cable cleaning wipes to remove any debris or contaminants from the cable.

Image: Narasingaraj Surappan (EHV Cable Jointer).

400KV Cable | Stripping & Jointing Prysmian EHV Cable Using Hivotec CP130

Thorne & Derrick International

T&D are Specialist Distributors of High Voltage Joints & Terminations to UK and international customers – we guarantee expert technical support across an extensive range of core products to joints, splice, terminate or connect medium and high voltage (MV-HV) cables.

• Key Products: MV-HV Cable Joints & Terminations, Cable Cleats, Duct Seals, Underground Cable Protection, Earth Tapes, Cable Jointing Tools, Feeder Pillars, Insulating Matting, Cable Ducting, Earthing & Lightning Protection, Electrical Safety, Cable Transits, Cable Glands, Arc Flash Clothing/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.

Cable Innovation Tools & Accessories for Low & High Voltage Power Systems