Blog
Ensto Cold Shrink MV Substation Cable Termination (24kV XLPE Single Core)
May 11th, 2021Image Courtesy of: Morteza Sobhani – Expert Technical Support & Installation High Voltage & Medium Voltage HV MV Products
Pictured: Ensto Cold Shrink MV Substation Cable Termination (24kV XLPE Single Core)
Ensto Cold Shrink (MV HV Indoor Termination)
Cable stripping dimensions should be carefully observed by the MV cable jointers and the correct cable jointing tools used to remove sheath, insulation and semi-conductive screens.
Andy O’Malley commented “Nice clean tidy work area – silicone tape applied at the bottom of the cold shrink termination.”
Jointers blog
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Cable Terminations & Minimum Air Clearances for Bushings
May 11th, 2021
- Check the cable box for minimum clearances and refer to table 1 below.
- If actual dimension ‘A’ and ‘B’ is less than the value given, a bushing boot must be fitted.
| Table 1 – Minimum Air Clearances for Terminations in Cable Boxes in Accordance with BS 164 Class A. | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Air Clearance Between Live Metal ‘A’ (mm) | 90 | 127 | 242 | 356 |
| Minimum Air Clearance Between Live Metal and Earth ‘B’ (mm) | 65 | 75 | 140 | 222 |
| Table 2 – Minimum Air Clearances for Terminations in Cable Boxes in Accordance with BS 164 Class A. with Bushing Boots Fitted | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Air Clearance Between Live Metal ‘A’ (mm) | 45 | 75 | 100 | 125 |
| Minimum Air Clearance Between Live Metal and Earth ‘B’ (mm) | 32 | 60 | 75 | 100 |
| Table 3 – Minimum Clearance Between Cores and Between Cores and Earth | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Clearance ‘C’ (mm) Measured From top of Stress Tubes | 15 | 20 | 40 | 50 |
| Table 4 – Minimum Clearance Between top of The Stress Control Tubing and Base of the Cable Lug. | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Minimum Clearance ‘D’ (mm) | 30 | 50 | 95 | 250 |
| Table 5 – Impulse Voltage Withstand for Indoor Terminations, Installed With Bushing Boots, on Bushings in Accordance with BS2562. | ||||
| Maximum System Voltage, Phase to Phase (kV) | 7.2 | 12 | 24 | 36 |
| Impulse Withstand Voltage (kV) | 75 | 95 | 125 | 170 |
MV HV Cables 11kV 33kV – Joints, Terminations & Connections
THORNE & DERRICK
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 power systems:
- 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
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 MVÂ
SICON By PFISTERER | Shearbolt Connectors with Stepless Shear-Off Bolts
May 11th, 2021
SICON Shearbolt Connectors
The Right Connection for All LV MV HV Conductors – For years, bolted clamps, connectors, and cable lugs have been gaining ground – with good reason. Bolted connectors offer technical and practical advantages that compression technology cannot match.
Meet the Next generation SICON connectors from Pfisterer.
Bolt type connectors offer not only technical, but also practical advantages over compression technology. All SICON Shearbolt Cable Connectors cover a wide conductor cross-section range so that you always have the right connectors on site for any application.
Main benefits of Sicon Connectors include:
- Reliable connection for all conductors
- Optimal contact force for all conductors
- No damage to individual strands
- Installation with standard tools
- Ideal for all type of joints or terminations
- Wide application range
- See also SEANEX Connectors
PFISTERER
DISTRIBUTORS, STOCKISTS & SUPPLIERS
Thorne & Derrick provide competitive prices and fast delivery from stock for the complete range of LV MV HV Power Products manufactured by Pfisterer – this includes Pfisterer CONNEX MV HV cable plugs and terminations.
Pfisterer Sicon
Benefits of the Pfisterer Shearbolt Connectors
Simple Installation of sicon with Standard Tools
SICON bolted connectors are installed directly onto the ends of the conductor with a standard allen key. The innovative design of the stepless shear bolt allows simple installation regardless of the conductor type. Optimal contact force is always achieved with the special design of the bolt.
Easy To Install shearbolt connectors
All SICON connectors can be easily installed, even under tight spots. The bolt shears off smoothly when it is tightened, while the remains stay in the tool and can be safely disposed of. The bolt always shears off at the top edge of the connector body. This way, there are no sharp protrusions. All edges of the connector body are rounded.
Cost-Effective Sicon Connectors
Every SICON connector covers a wide x-section range. This way, you always have the right connectors with you on site. And even if during repair work it is unclear what type of conductors must be connected and in which condition are they in, SICON is the right choice.
SICON connectors are electrically/mechanically type-tested in accordance with IEC 61238-1 class A and ANSI C119.4.
All Conductors Are Optimally Connected
SICON connectors can be used independently of the conductor material , type, voltage level and current. No matter whether aluminum or copper, solid or stranded – the conductor is always connected with perfect contact pressure. For aluminium conductors, this means with a contact force up to 30% higher than of conventional connectors. The transverse grooves in the clamping channel break through the oxidation layers and reliably establish the contact.
Pfisterer SICON Shearoff Cable Connectors
Sicon Application Range
The Pfisterer SICON range of Shearbolt Cable Connectors is made up of Split Connectors, Branch Connectors and Cable Lugs.
- Split Connectors are for use in installations where it is difficult to install the connector on the conductor
- Branch Connectors can be used to join 3 different conductors regardless of size or material
- Cable Lugs enable the cable ends of electrical devices to be connected with a bolt or a stud
Branch Connector |
Cable Lug Central Palm |
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Cable Lug NEMA |
Split Connector |
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Thorne & Derrick JOINTERS BLOG
Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
15,000+ Subscribers. ➡
11kV Flexible Rubber Reeling Vulcanised Cable Joint
May 11th, 2021Picture Courtesy of: Corey Caulfield – Director/Cable Jointer at HV Connect Pty Ltd
Pictured: 11kV Flexible Rubber Reeling Vulcanised Cable Joint
11kV Flexible Rubber Reeling Vulcanised Cable Joint
This vulcanised type cable joint is smooth profile preventing “snagging” of the 11kV joint during the reeling process – there is absolute minimal increase to the overall outside of the cable diameter despite the joint.
“The cable joint was completely taped using a variety of 3M Scotch vulcanising tapes and the outer sheath was re-instated using Prysmian rubber tape. A complete cable joint carried out on a stacker,” said Corey.
Jointers blog
Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
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High Voltage Lead Sleeve Y Joint
May 11th, 2021This striking splicing image demonstrates traditional cable jointing techniques requiring exceptional manual dexterity, acute concentration and advanced skill levels.
Modern polymeric cable jointing is now dominated by cold-shrink, click-fit and push-on type splices which are frequently alleged to have de-skilled the Jointer by introducing simplified installation processes.
Whether you agree or disagree, no jointer can dispute that “old-school” jointing skills demand the highest levels of professionalism, knowledge and ability:
- Sweated ferrules
- Hand applied oil tapes
- Plumbed lead sleeve
- Compound filled
Single end wipe completed by Jimmy Nicklin, double end wipe completed by Andrew O’Malley.
Image Courtesy of:Â Andrew O’Malley (IBEW 258 EHV Cable Jointer/Splicer).
High Voltage Lead Sleeve Y Joint
Jointers blog
Subscribe now to our POWER NEWSLETTER– a monthly email circulation packed with news, projects, videos, technical tips, training information, promotions, webinars, career opportunities and white papers.
Includes access to our popular JOINTERS BLOG with contributions from utility professionals, linesmen and cable jointers working on MV HV EHV cables and overhead lines typically at 11kV, 33kV, 66kV and up to 132kV.
15,000+ Subscribers. âž¡
