Cable Joints Sudkabel | HV Silicone Rubber Heat Shrink Joints 72.5kV to 550kV

HV Cable Joints Sudkabel 72.5kV to 550kV

Cable Joints Sudkabel for XLPE-Insulated High Voltage & Extra High Voltage Cable Systems

The Sudkabel Cable Joints range of EHV & HV, high-performance joints are expertly designed and manufactured as a cable jointing solution for XLPE-insulated high voltage and extra high voltage power cables. Offering a maximum voltage range from 72.5 kV up to 550kV, the Sudkabel Cable Joints are available in two variants, SEHDV and SEHDVBC. Engineered to ensure long-term electrical and mechanical performance, the Sudkabel Cable Joints range is designed for a wide range of installation environments – from underground cable systems to challenging air-insulated connections.

Sudkabel‘s high voltage SEHDV Cable Joint series is compliant with IEC 60840 Power Cable Standards, which covers operating voltages of 72.5kV, 123kV, 145kV and 170kV. Due to the SEHDV Cable Joint series being suitable for extra high voltage cables, this variant is compliant IEC 62067

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Sudkabel Cable Joints SEHDV & SEHDVCB Technical Specifications

Cable Joints Sudkabel SEHDV Technical Specification
High Voltage Um	–	72.5kV	123kV	145kV	170kV
Variant	kV	SEHDV	SEHDV	SEHDV	SEHDV
Impulse lighting voltage	kV	350	550	650	750
Switching impulse voltage	kV	–	–	–	–
Impulse lighting voltage screen separation	kV	60	75	75	75
Impulse lighting voltage outer protection	kV	30	37.5	37.5	37.5
Direct voltage outer protection	kV	20	20	20	20
Normative document	IEC	60840	60840	60840	60840
Cu/Al conductor (min.)	mm²	95	150	240	240
Cu/Al conductor (max.)	mm²	2500	2500	2500	2500
Rated current (max.)	A	2500	2500	2500	2500
Rated peak current	kA	170	170	170	170
Rated short-time withstand current	kA/s	50/3 63/1	50/3 63/1	50/3 63/1	50/3 63/1
Length insulation body (approx.)	mm	540	680	680	680
Weight of standard-variant (approx.)	kg	15	30	30	30
Max. longitudinal force effect (in-air installation)	kN	20	20	20	20
Max. longitudinal force effect (in-ground installation)	kN	30	30	30	30

Cable Joints Sudkabel SEHDV(CB) Technical Specification
High Voltage Um	–	245kV	300kV	362kV	420kV	550kV
Variant	kV	SEHDV(CB)	SEHDV(CB)	SEHDV(CB)	SEHDV(CB)	SEHDV(CB)
Impulse lighting voltage	kV	1050	1050	1175	1425	1550
Switching impulse voltage	kV	–	850	950	1050	1175
Impulse lighting voltage screen separation	kV	95	95	125	125	145
Impulse lighting voltage outer protection	kV	47.5	47.5	62.5	62.5	72.5
Direct voltage outer protection	kV	20	20	20	20	20
Normative document	IEC	62067	62067	62067	62067	62067
Cu/Al conductor (min.)	mm²	400	400	500	630	800
Cu/Al conductor (max.)	mm²	2500	2500	3200	3200	3200
Rated current (max.)	A	2500	2500	2500	2500	2500
Rated peak current	kA	170	170	170	170	170
Rated short-time withstand current	kA/s	50/3 63/1	50/3 63/1	50/3 63/1	50/3 63/1	50/3 63/1
Length insulation body (approx.)	mm	740	740	900	900	900
Weight of standard-variant (approx.)	kg	50	50	380	380	380
Max. longitudinal force effect (in-air installation)	kN	20	20	20	20	20
Max. longitudinal force effect (in-ground installation)	kN	30	30	30	30	30

Silicone Rubber Heat Shrink Cable Joints | SEHDV & SEHDVCB

What’s the difference between SEHDV & SEHDVCB? The main distinction between SEHDV Cable Joints Sudkabel and SEHDV Cable Joints Sudkabel Cable Joints is the difference in their maximum voltage ranges and corresponding design enhancements. Although, these Cable Joints share virtually the same exact key features and benefits, SEHDV joints are engineered for high voltage (HV) applications up to 170kV and are tested according to IEC 60840, making them ideal for standard transmission systems. In contrast, SEHDVCB joints are specifically developed for extra high voltage (EHV) applications ranging from 245kV up to 550kV, with testing in accordance with IEC 62067.

Compact, high-reliability design with factory-tested insulation bodies, ensuring robust dielectric performance and ease of installation up to 550 kV.
Adaptable joint configuration suitable for in-air or in-ground installations, supporting high mechanical loads and thermal cycling.
Tested for impulse and DC withstand strength, ensuring safe operation under lightning impulse, screen separation, and outer protection conditions.
Wide conductor compatibility, handling copper and aluminium cables from 95 mm² to 3200 mm², for both new and retrofit installations.
Long-term field performance, backed by prequalification to IEC standards, ensuring confidence in critical infrastructure deployments.

Applications & Compliances

Applications

Due to the compact design, consistent dielectric performance and, compliance with global standards (IEC 60840 & IEC 62067), Sudkabel’s SEHDV(CB) HV Cable Joints are trusted with applications in critical transmission and infrastructure projects worldwide.

Underground HV/EHV Cable Systems: Secure jointing between high-voltage cable sections in buried transmission networks.
Substation Interconnections: Intermediate joints within complex substation layouts.
Cable Extension & Replacement Projects: Suitable for upgrading or repairing aged or damaged sections in existing networks.
Air-Insulated or Tunnel Installations: Designed to handle mechanical loads and environmental variations in above-ground cable routes.
Extra-High Voltage Transmission Corridors: Proven insulation design for 420kV and 550kV grid applications.

Standards & Compliance

The SEHDV and SEHDVCB HV Cable Joints Sudkabel are manufactured and tested to meet the rigorous demands of high voltage and extra high voltage cable systems:

IEC 60840 – Power cable systems for rated voltages from 30 kV to 150 kV (applies to SEHDV variants up to 170 kV)
IEC 62067 – Power cable systems for rated voltages above 150 kV up to 550 kV (applies to SEHDVCB variants from 245 kV to 550 kV)

Every joint is factory-assembled and tested for dielectric performance, mechanical robustness, and field control reliability, ensuring consistent quality and safe, long-term operation in both air and ground installations.

Südkabel | EHV HV Cable Joints, Terminations & Connectors

Thorne & Derrick | Distributors, Stockists & Suppliers

With over 125 years of experience, Südkabel has been at the forefront of market-leading cable technology, particularly in the development of XLPE-Insulated Cables. Südkabel’s product portfolio includes XLPE Power Cables up to 550 kV and EHV & HV Cable Accessories such as Plug-in Terminations, Compact Terminations, Outdoor Cable Terminations, Dry & Solid Outdoor Cable Terminations, Silicone Rubber Heat Shrink Cable Joints, as well as accompanying Cable Materials.

Get in touch with our team of experts – offering 40+ years of industry experience, we distribute the most extensive range of MV HV Medium & High Voltage Cable Joints, Terminations & Connectors from manufacturers including Südkabel, 3M, Prysmian, Nexans Euromold, Elastimold, Pfisterer CONNEX & SEANEX and Shrink Polymer Systems.