HV Plug-In Terminations 66kV 72.5kV | Inner & Outer Cone Connectors GIS Switchgear

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HV Plug-In Cable Terminations 66kV 72.5kV

The Sudkabel HV Plug-In Terminations, offering operating voltages of 66kV up to 72.5kV are engineered for space-saving, high-performance connections to switchgear and transformers in both inner and outer cone applications. These HV Plug In Terminations (compliant with Power Cable Standards, such as IEC 60840), are designed for flexible compatibility with an extensive range of industry-standard interfaces, offering reliable, compact solutions for modern substation and distribution systems.

Sudkabel have designed and manufactured 4 HV Plug-In Termination variants, EHSIK (Inner Cone Termination), EHSAT (Outer Cone T-Termination), EHSAK (Direct Parallel Connection), EHMUT (T-shaped Surge Arrester) all of which with operating voltages up to 72.5kV, but featuring a range of performance capabilities.

Contact our experts – we’ll help you find the essential HV Cable Joints, Terminations & Connectors for your operations:

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Plug-In Terminations Inner & Outer Cone Connections Technical Specifications

The following table provides a further insight on Sudkabel’s Plug-In Cable Termination range, including EHSIK, EHSAT, EHSAK & EHMUT Inner Cone & Outer Cone high-voltage variants:

Sudkabel HV Plug-In Terminations Inner & Outer Cone Connections Technical Specifications
Highest voltage Um	kV	72.5kV	72.5kV	72.5kV	72.5kV
Type		Sudkabel EHSIK	Sudkabel EHSAT	Sudkabel EHSAK	Sudkabel EHMUT
Impulse lighting voltage	kV	350	350	350	350
Switching impulse voltage	kV	–	–	–	–
Normative document	IEC	60840	60840	60840	60099-4
Cu/Ai conductor (min.)	mm²	95	95	95	–
Cu/Ai conductor (max.)	mm²	800	1000	1000	–
Rated current (max.) *	A	1250	2500	1250	–
Rated peak current *	kA	100	100	100	–
Rated short-time withstand current *	kA/s	40/3	40/3	40/3	–
Length L1	mm	–	253	450	625
Length L2	mm	–	550	550	550

EHSIK 72.5kV | Inner Cone Termination

• Designed for inner cone bushings (Type 3) per EN 50180 / EN 50181 / draft EN 50673

• Adaptable to IEC 62271-209 interfaces

• Compact solution for connecting to Gas Insulated Switchgear (GIS) or transformers

• Voltage range: up to 72.5 kV

• Conductor cross-section: 95–800 mm²

• Cone clamp connection and rated up to 1250 A

• Fully type-tested to IEC 60840

  

  HV Plug In Cable Termination | Sudkabel EHSAT 66kV 72.5kV

EHSAT 72.5kV | Outer Cone T-Termination

• T-shaped Plug-In Termination for outer cone bushings (Type F per EN 50180 / 50181)

• Provides direct, compact connection to switchgear or transformers

• Supports screw-type conductor connection

• Voltage range: up to 72.5 kV

• Conductor cross-section: 95–1000 mm²

• Rated current options: 630 A / 1250 A / 2500 A

• Qualified to IEC 60840

EHSAK 72.5kV | Direct Parallel Connection

• Compact plug-in unit for space-saving inline connections

• Connects directly to EHSAT 72.5kV without additional couplers

• Voltage range: up to 72.5 kV

• Conductor cross-section: 95–1000 mm²

• Cone clamp connection, rated up to 1250 A

EHMUT 72.5 | T-shaped Surge Arrester

• Surge protection module for direct mounting to EHSAT or EHSAK

• Utilizes metal-oxide technology for reliable voltage limitation

• Compact, integrated solution for equipment protection

• Compliant with IEC 60099-4

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Sudkabel HV Plug In Terminations Cable Standards

♦ IEC 60840

“Power cables with extruded insulation and their accessories for rated voltages from 30 kV up to 150 kV”

Applies to: EHSIK, EHSAT, EHSAK

The IEC 60840 cable standard ensures the reliability and electrical safety of Plug-In Terminations, HV Cable Terminations and accessories for medium and high voltage systems:

• Validates dielectric performance under operational stress

• Requires type testing such as impulse testing, heating cycles, and partial discharge checks

• Confirms that components can withstand short-circuit conditions (e.g. 40 kA for 3s)

Compliance ensures these terminations are suitable for critical infrastructure where system uptime and insulation integrity are paramount.

♦ IEC 60099-4

“Metal-oxide surge arresters without gaps for a.c. systems”

Applies to: EHMUT

This cable standard governs non-linear metal-oxide surge arresters, ensuring:

• Protection from lightning impulse voltages

• Safe dissipation of transient overvoltages

• Long-term performance under repeated surge conditions

EHMUT units built to IEC 60099-4 protect valuable switchgear and transformer assets by mitigating voltage spikes, enhancing grid resilience and safety.

♦ EN 50180 / EN 50181

“Bushings above 1 kV up to 52 kV and for testing purposes”

Applies to: EHSIK (inner cone), EHSAT (outer cone)

These European standards define the mechanical interface dimensions for transformer and switchgear bushings. Ensures:

• Interoperability between plug-in terminations and bushings

• Standardized cone types (e.g. Type 3, Type F)

• Safe and consistent mating of terminations with primary equipment

Compliance guarantees a universal fit and safe operational clearances between components.

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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.

Data Sheets

• Sudkabel Cable Accessories for EHV HV Cables | Catalogue
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