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Drum Heating & Cable Straightening Jackets For 132kV Extra High Voltage Cable Terminations

• Application: Drum Heating & Cable Heating HV EHV 
• Drum Heater Type: Heating Jacket For Silicone Oil Drums
• Contractor: Matthew Taffs (CRS Ltd) – EHV Cable Jointer & Director 
• Featured Manufacturer: Prysmian 132kV Click Fit Cable Terminations XLPE
• Featured Product: Thorne & Derrick Drum Heater HF5-D
• Extra High Voltage Cable Type: 132kV Prysmian Single Core XLPE 800sqmm

Terminating 132kV Cables

Cable Oil & Drum Heating

Drum Heaters

Cable heating jackets are initially used to heat the EHV cable to enable relaxing and straightening of the high voltage power cable prior to cable preparation and stripping using cable jointing tools – typically the cable heaters provide a stable temperature of 85 degrees Celsius (185F) for at least 12 hours to the XLPE cable to improve cable manipulation for the HV jointer.

Straightening tubes are then applied to the heated cable and allowed to cool.

The following day cable jointing commences.

The drum heating jacket is applied around the oil drum (silicone oil) and heated to a temperature between 105 – 115 degrees Celsius.

This is done firstly and most importantly to ensure there is no moisture in the oil and secondly to make the oil thinner so it can be pumped into the high voltage cable termination. Once the oil has reached a temperature exceeding 105 degrees Celsius the cable jointer can check with a flash light the condition of the oil.

The heated oil should remain clear with no signs of bubbles, white clouds or foaming.

The oil is then pumped from the drum into the cable terminations insulator to a measurement given on the drawing/ cable jointing instruction. Once the insulator is full to the required measurements, the top is then bolted on and then the cable jointer must press crimp the connector using hexagonal process (HEX) at the correct positions.

T&D supply an extensive range of High Voltage Jointing & Electrical Equipment to enable cable lubrication, cable pulling and installation of 66kV/132kV power cable systems – this includes 132kV surge arresters for electrical protection against overvoltages caused by lightning strike and switching operations.

♦ View complete range of 132kV Terminations, Joints & Sealing Ends

Pictured: T&D drum heater providing consistent and stable electric surface heating to oil drums for EHV cable termination installations.

In order to achieve the required drum heating temperature of 100+ degrees Celsius the heater jacket was used in conjunction with a base drum heater to accelerate the high temperature heating requirement of the oil – you can see the plate of the base drum heater in the photo below.

Cable Repair Services Ltd

CRS are predominately a reactive cable faults and services team specialising in repairing high voltage fluid filled cables.

CRS have a wealth of experience maintaining, repairing, jointing, terminating and fault-finding on all types of HV fluid filled cable systems ranging from 33kV to 400kV.

All CRS operatives have been trained to the highest standards by companies such as BICC, Prysmian and Balfour Beatty and are able to undertake jobs safely and efficiently while remaining cost effective. Their highly skilled Cable Jointing and Oil Technicians have the capability to joint both polymeric (XLPE) and fluid filled cables up to and including 400kV.

Additional cable services include PILC cable jointing (11kV-66kV), HP gas jointing (66kV-132kV), pilot cable jointing, joint bay refurbishment, cable sheath repairs, serving faults, cable fluid leak locating, gauge calibration and circuit fluid pressurisation.

CRS Cable Repair Services Ltd (CRS Ltd) – trained staff have completed course training to comply with UK Power Network (UKPN) types A,B & C confined spaces.

Prysmian | Cable Joints | Terminations | Cleats | Connectors Distributor

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

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

More…

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

➡ Visit Power Blog.

Do Insulating Gloves Provide Arc Flash Protection?

Electrical Safety Equipment | Insulating Gloves | Arc Flash Gloves

• uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

There are a lot of misconceptions about arc flash clothing and protection levels required including what actually is a flash of light or an arc of fire. Similar to an electric shock but not the same as usually there is not direct contact with electricity.

Arc flash is a serious issue with more than 30,000 incidents that result in 400 fatalities every year. So how can you protect your hands from this deadly killer and do insulating gloves provide arc flash protection? Or are special application arc flash gloves required?

The below Blog from Scanwear delves deeper into the issue.

One question that comes up all the time during electrical safety training is whether or not an electrician’s rubber insulating gloves offer any protection from Arc Flash?

Interestingly enough, even though you probably won’t find a label on the insulating glove that says so, rubber insulating gloves used in conjunction with leather protectors do offer sufficient protection from arc flash burns.

Now we are talking about arc flash protection but don’t forget why you are wearing the gloves in the first place. That needs to be your primary concern when it comes to protecting your hands. Once you’ve got that taken care of you can worry about arc flash.

Is This Legitimate?

The industry standard for electrical safety, NFPA70E, does not offer much information about how to size your gloves for arc flash protection or how to determine the incident energy rating for your gloves but we are led to believe that they have done some testing and feel comfortable saying that the rubber insulating gloves with leather protectors will protect you from an arc flash.

Here is what it says in the standard:

“If rubber insulating gloves with leather protectors are used, additional leather or arc-rated gloves shall not be required. The combination of rubber insulating gloves with leather protectors satisfies the arc flash protection requirement.”

That note applies to an arc flash PPE category of 4 which requires a minimum of 40 cal/cm2 protection. So that gives the user a good level of comfort that the gloves offer great protection from arc flash.

How Can You Prove It?

Up until June 2013, the amount of arc flash protection was determined by the thickness of the leather protectors. That year though a new standard for testing gloves was approved and testing started immediately. Because thickness of the gloves was not part of the criteria for meeting the standard manufacturers are now coming out with thinner leather gloves that still offer the maximum protection against arc flash.

Something you might want to look into with your supplier of arc flash clothing, garments and protection including helmets and gloves.

Also, traditional rubber insulating gloves with leather protectors were tested alongside some of the arc flash gloves which you may now see on the market and it was proven that they offer fantastic protection from arc flash. In case you are curious, the standard for testing gloves for arc flash is ASTM F2675-13.

Just remember, the main reason you are wearing the rubber insulating gloves is to protect against shock hazards. Fortunately, your regular rubber insulating gloves with leather protectors offer an excellent protection from an arc flash hazard and should always be worn, when there is a risk of a shock or an arc flash event.

Further Information  ➡ 

Arc Flash Gloves | 25 40 60 Cal Arc Flash Protection Gloves PPE

Arc Flash Gloves | 50 Cal Arc Flash Protection Gloves PPE

INSULATING GLOVES

Selection Of Correct Gloves 

Insulating gloves should be selected according to their class which corresponds to the voltage level used – additionally the gloves are classified into categories according to environmental resistance properties detailed below.

• Class
• Voltage
• Product colour
• Size – between 7-12 for either male of female use
• Classifications and standards

When selecting the correct insulating gloves all of the above factors are vital to consider in order to achieve the adequate level of protection required.

In addition, some gloves will also require an under-glove for comfort or a leather over-glove to maintain product longevity.

Inspection and storage of insulating gloves is also a vital factor to consider as all gloves must be visibly inspected after each inflation and before each use.

This is to make sure there are no tears or abrasion to the gloves prior to use, maintaining their dielectric properties.

Insulating rubber gloves are also categorised by environmental resistance properties for protection against acid, oil, o-zone and very low temperatures.

• A – Acid
• H – Oil
• Z – O-Zone
• R – Acid, Oil and O-Zone
• C – Very Low Temperatures

INSULATING GLOVES – CLASS & CATEGORY

The following gloves manufactured by CATU Electrical and T&D would normally recommend for mechanical protection they be used with silicon leather glove covers or over-gloves but in light of the above this might all change.

Insulating Matting | Voltage Detectors | Substation Safety MV HV

Arc Flash Learning & Resources

Thorne and Derrick are proud to be distributors of ProGARM arc flash coveralls and protection.

We can help – should you require arc flash calculators or advice on the type of clothing and protection available please do not hesitate to contact us.

ProGARM 4690 Coverall	ProGARM 4616 Trouser	ProGARM 5816 Trouser	ProGARM 7638 Trouser	ProGARM 6458 Coverall
ProGARM 7418 Trouser	ProGARM 7480 Coverall	ProGARM 5290 Polo Shirt	ProGARM 6444 Coverall	ProGARM 5286 Polo Shirt

Download Your Guide To Arc Flash Here

We supply 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 

Euromold 11kV Connectors Terminating EPR Cable Into MV Primary Switchgear

• Application: Terminating 11kV EPR Cable Into MV Primary Switchgear
• Connector Type: Nexans Euromold 11kV (Screened Separable Connectors)
• Cable Jointer: Will Oates 33kV Electrical Jointer at Western Power Distribution WPD
• Featured Manufacturer: Nexans Euromold

Euromold 11kV Connectors

Nexans Euromold screened separable connectors are used to terminate high voltage cables with polymeric insulation (XLPE & EPR) onto switchgear and transformer bushings up to 11kV-33kV.

Screened separable connectors are also known as screened elbow connectors or tee connectors.

The HV cable connectors suit high voltage electrical equipment and are compatible with gas insulated switchgear (GIS) manufactured by ABB, Siemens, Alstom, Brush and Hawker Siddley.

Euromold bushings are also available for other types of high voltage oil, air and gas insulated switchgear and transformers to CENELEC EN50180 and ANSI IEEE 386 standards.

Here the Euromold connectors are shown terminating single core 11kV EPR insulated cables with copper wire screens onto switchgear bushings – the wire screens are bundled collectively and earthed onto the copper busbar using brass mechanical cable lugs.

11kV Cable Lugs & Connectors

The 11kV cable conductors have been terminated by the cable jointer and crimped using copper cable lugs, possibly bi-metallic type. The cable conductors could be aluminium suggested by the visible reflection due to the flash inside the Nexans tee connector body. An insulating plug will go into the gap closing the air gap to the outside of the Nexans connector semi-conducting layer. When selecting high voltage cable lugs for stranded copper 11kV-33kV conductors it is crucial to ensure crimp lugs are manufactured using high conductivity copper usually in accordance with BS EN 12735-1:2016 and with a material purity of 99.5%, typically the Cembre 2A range.

Compatible with heat shrink and cold shrink terminations, Cembre 2A cable lugs are also watertight without inspection holes and feature extended barrels to achieve optimum HV cable termination of the conductor without risk of burning-out due to sub-standard crimp connections – cable lugs are available electrolytically tin-plated to BS1872 standard for high corrosion and humidity installations within 11kV/33kV substations.

• BS EN 12735-1:2016 – Copper and copper alloys. Seamless, round tubes for air conditioning and refrigeration. Tubes for piping systems.
• BS 1872:1984 – Specification for electroplated coatings of tin.

NEXANS EUROMOLD MV HV POWER CABLE ACCESSORIES

The range of Nexans MV HV power cable joints, terminations and connectors can be used on applications at 6.6kV, 11kV, 15kV, 24kV and 33kV.

See more Nexans Cable Terminations:

• Separable Connectors
• Heat Shrink Cable Terminations
• Cold Shrink Cable Terminations
• Outdoor Terminations
• Earthing

Should you require any assistance with the selection or specification of Euromold separable connectors or bushing types 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.

Fire Resistant Cables – IEC Marine & Offshore DNV Approved

Marine Offshore Cables & Accessories – Fire Resistant Cables

• Cable Type: Fire Resistant
• Industry: Marine & Offshore
• Manufacturer: Helkama
• Classification: IEC
• Flame Retardant: IEC 60332-1-2, IEC 60332-3-22
• Halogen Free: IEC 60754
• Low Smoke Emission: IEC 61034
• Oil Resistant (SHF2): IEC 60811-404

➡ See also: Cable Glands | Hazardous Area Flameproof & Explosion Proof

Helkama Cables Part Number	Instrumentation Cable Description	Cable Type
RFA-FRHF	Fire resistant, collectively screened instrumentation and communication cable with SHF1 or SHF2 sheath for fixed installation 250V FRHF
RFA-FRHF(i)	Fire resistant, pair- and collectively screened instrumentation and communication cable with SHF1 or SHF2 sheath 250V FRHF
RFE-FRHF	Fire resistant, armoured instrumentation and communication cable with SHF1 or SHF2 sheath 250V FRHF
RFE-FRHF(i)	Fire resistant, pair screened, armoured instrumentation and communication cable with SHF1 or SHF2 sheath 250V FRHF
RFE-EMC-FRHF	Fire resistant, armoured instrumentation and communication cable with improved EMC screening and SHF1 or SHF2 sheath 250V EMC-FRHF
RFE-EMC-FRHF(i)	Fire resistant, pair screened, armoured instrumentation and communication cable with improved EMC screening and SHF1 or SHF2 sheath 250V EMC-FRHF
LKM-FRHF	Fire resistant, unarmoured control and instrumentation cable with SHF1 or SHF2 sheath 250V FRHF
LKAM-FRHF	Fire resistant, screened control and instrumentation cable with SHF1 or SHF2 sheath 250V FRHF
LKSM-FRHF	Fire resistant, armoured control and instrumentation cable with SHF1 or SHF2 sheath 250V FRHF
LKM-FRHF	Fire resistant, unarmoured control and power cable with SHF1 or SHF2 sheath 0,6/1kV FRHF
LKAM-FRHF	Fire resistant, screened control and power cable with SHF1 or SHF2 sheath 0,6/1kV FRHF
LKSM-FRHF	Fire resistant, armoured control and power cable with SHF1 or SHF2 sheath 0,6/1kV FRHF
LKMM-FRHF	Fire resistant, unarmoured control and power cable with extruded filler and SHF1 or SHF2 sheath 0,6/1kV FRHF
LKMSM-FRHF	Fire resistant, armoured control and power cable with soft extruded filler and SHF1 or SHF2 sheath 0,6/1kV FRHF
LKSM-EMC-FRHF	Fire resistant, armoured power and control cable with improved EMC screening and SHF1 or SHF2 sheath 0,6/1kV EMC-FRHF

Developing & Manufacturing Offshore & Marine Cables For Over 50 Years

Marine & Offshore Fire resistant

Cable Accessories

THORNE & DERRICK are international distributors of LV, MV & HV Offshore & Marine Cable Installation, Jointing, Substation, Earthing & Electrical Equipment – we supply Joints, Glands, Cleats & Cable Accessories specified for use in harsh and hazardous areas to support the installation of marine and offshore fire resistant cables.

Since 1985, T&D have established an international reputation based on SERVICE | INTEGRITY | TRUST.

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

DNV

DNV is a rigorous approval system for cable accessories including joints, glands and cleats – the DNV approval process assesses all of the evidence offered by the manufacturer and compares it to the requirements of the international standard, IEC61914. Once full compliance is proven DNV Type Approval is offered.

Cable Joints

DNV Approved

Hydrocarbon Resistant | Zero Halogen & Fire Resistant

Cable Glands

Hazardous Area Explosion Proof | Zero Halogen

Cable Cleats

Zero Halogen | Fire Resistant | Stainless Steel

Also ➡ Cable Labels, Cable Ties, Cable Transits and Cold Shrink

Contact Thorne & Derrick for further information and customer service – extensive range of DNV Approved Marine & Offshore Cables & Cable Accessories available for delivery to UK and international projects.

LV MV HV – 3.3kV 6.6kV 11kV 33kV

More IEC Offshore & Marine Cables

1. 1. Instrumentation Cables
   2. Power Cables
   3. EMC & VFD Cables
   4. Heat Resistant Cables
   5. Fire & Water Resistant Cables
   6. Lightweight Cables

T&D ⇒ CABLE ♦ JOINT ♦ TERMINATE ♦ CONNECT ♦ GLAND ♦ CLEAT ♦ CRIMP ♦ DUCT ♦ SEAL ♦ REPAIR 

THORNE & DERRICK

T&D are Specialist Distributors to UK Distribution Network Operators (DNO’s), NERS Registered Service Providers, ICP’s and HV Jointing Contractors of an extensive range of LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt – this includes 11kV/33kV/66kV cable joints, terminations and connectors for both DNO and private network applications.

Specialists Distributors of Cable Sealing Systems from leading manufacturers including: Hauff Technik | Roxtec | CSD | Filoseal

Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.

Key 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 

Heat Resistant Cables – IEC Marine & Offshore DNV Approved

Marine Offshore Cables & Accessories – Heat Resistant Cables

• • Cable Type: Heat Resistant
  • Industry: Marine & Offshore
  • Manufacturer: Helkama
  • Classification: IEC
  • Flame Retardant: IEC 60332-1-2, IEC 60332-3-22
  • Halogen Free: IEC 60754
  • Low Smoke Emission: IEC 61034
  • Oil Resistant (SHF2): IEC 60811-404

➡ See also: Cable Glands | Hazardous Area Flameproof & Explosion Proof

Helkama Cables Part Number	Instrumentation Cable Description	Cable Type
LKSM-SHF2 120°C (0,6/1kV)	Heat and oil resistant armoured power and control cable 0,6/1kV
LKSM-SHF2 120°C (250V)	Heat and oil resistant armoured control and instrumentation cable
RFE-SHF2 120°C (250V)	Heat and oil resistant armoured pair instrumentation and communication cable
RFE-SHF2(i) 120°C (250V)	Armoured and individually screened instrumentation and communication cable 250V

Developing & Manufacturing Offshore & Marine Cables For Over 50 Years

Marine & Offshore Heat Resistant

Cable Accessories

THORNE & DERRICK are international distributors of LV, MV & HV Offshore & Marine Cable Installation, Jointing, Substation, Earthing & Electrical Equipment – we supply Joints, Glands, Cleats & Cable Accessories specified for use in harsh and hazardous areas to support the installation of marine and offshore heat resistant cables.

Since 1985, T&D have established an international reputation based on SERVICE | INTEGRITY | TRUST.

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

DNV

DNV is a rigorous approval system for cable accessories including joints, glands and cleats – the DNV approval process assesses all of the evidence offered by the manufacturer and compares it to the requirements of the international standard, IEC61914. Once full compliance is proven DNV Type Approval is offered.

Cable Joints

DNV Approved

Hydrocarbon Resistant | Zero Halogen & Fire Resistant

Cable Glands

Hazardous Area Explosion Proof | Zero Halogen

Cable Cleats

Zero Halogen | Fire Resistant | Stainless Steel

Also ➡ Cable Labels, Cable Ties, Cable Transits and Cold Shrink

Contact Thorne & Derrick for further information and customer service – extensive range of DNV Approved Marine & Offshore Cables & Cable Accessories available for delivery to UK and international projects.

LV MV HV – 3.3kV 6.6kV 11kV 33kV

More IEC Offshore & Marine Cables

1. 1. Instrumentation Cables
   2. Power Cables
   3. EMC & VFD Cables
   4. Fire Resistant Cables
   5. Fire & Water Resistant Cables
   6. Lightweight Cables

T&D ⇒ CABLE ♦ JOINT ♦ TERMINATE ♦ CONNECT ♦ GLAND ♦ CLEAT ♦ CRIMP ♦ DUCT ♦ SEAL ♦ REPAIR 

THORNE & DERRICK

T&D are Specialist Distributors to UK Distribution Network Operators (DNO’s), NERS Registered Service Providers, ICP’s and HV Jointing Contractors of an extensive range of LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt – this includes 11kV/33kV/66kV cable joints, terminations and connectors for both DNO and private network applications.

Specialists Distributors of Cable Sealing Systems from leading manufacturers including: Hauff Technik | Roxtec | CSD | Filoseal

Contact our UK Power Team for competitive quotations, fast delivery from stock and technical support or training on all LV-HV products.

Key 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