Un Inner Cone Plug-In Termination manufacturer provides specialized cable accessories for connecting high-voltage power cables with GIS, transformateurs, appareillage de commutation, and other electrical equipment. The technology uses a compact plug-in interface and a premoulded stress cone to control the electrical field around the cable insulation.
Compared with conventional cable terminations, the inner cone design offers a compact connection structure. Donc, it works particularly well in substations where installation space remains limited. En outre, many modern designs use dry insulation technology, which simplifies installation and reduces the need for liquid insulating media.
Inner cone plug-in technology can serve medium-voltage, haute tension, and extra-high-voltage applications. Depending on the manufacturer and product design, available voltage classes can range from around 10 kV à 500 kV.
What Is an Inner Cone Plug-In Termination?
Un Inner Cone Plug-In Termination connects a power cable to an electrical apparatus through an inner cone bushing. The system normally includes a stress cone, conductive contact, insulation interface, sealing components, and mechanical pressure components.
The stress cone plays a critical role in electrical field control. It distributes electrical stress around the cable insulation and reduces the concentration of electric field at the end of the semiconductor screen.
Pendant l'installation, the cable termination enters the corresponding bushing. The interface then creates a controlled electrical connection between the cable and the equipment.
Par conséquent, inner cone technology can provide a compact solution for:
- GIS switchgear
- C-GIS switchgear
- Transformateurs de puissance
- Sous-stations isolées au gaz
- High-voltage switchgear
- Sous-stations d'énergie renouvelable
- Offshore wind power systems
- Systèmes de transport souterrains
- Systèmes électriques ferroviaires
The bushing interface must match the termination precisely. Par conséquent, engineers should confirm the interface dimensions before selecting an Inner Cone Plug-In Termination manufacturer.
Inner Cone Plug-In Termination Voltage Levels
Voltage rating represents one of the most important selection criteria. Cependant, customers should distinguish between the cable’s nominal voltage and the equipment’s maximum voltage.
The following list covers common or potentially applicable voltage levels from 10 kV à 500 kV.
| Nominal / Equipment Voltage | Application typique |
|---|---|
| 10 kV | Medium-voltage distribution |
| 11 kV | Réseaux de distribution |
| 12 kV | Medium-voltage systems |
| 15 kV | North American MV systems |
| 17.5 kV | MV equipment class |
| 20 kV | Réseaux de distribution |
| 22 kV | Medium-voltage distribution |
| 24 kV | MV switchgear |
| 26 kV | Special cable systems |
| 27.5 kV | Railway traction |
| 30 kV | Medium-voltage systems |
| 33 kV | Distribution and renewable energy |
| 35 kV | Medium-voltage networks |
| 36 kV | MV equipment class |
| 38 kV | Selected utility systems |
| 40.5 kV | MV switchgear class |
| 42 kV | Special MV applications |
| 45 kV | Special high-voltage applications |
| 52 kV | High-end MV applications |
| 66 kV | High-voltage distribution |
| 69 kV | North American transmission |
| 72.5 kV | IEC high-voltage equipment class |
| 90 kV | High-voltage systems |
| 110 kV | Transmission systems |
| 115 kV | North American transmission |
| 126 kV | IEC equipment class |
| 132 kV | Transmission systems |
| 138 kV | North American transmission |
| 145 kV | IEC equipment class |
| 150 kV | Selected transmission networks |
| 170 kV | IEC equipment class |
| 220 kV | Transmission systems |
| 230 kV | North American transmission |
| 245 kV | IEC equipment class |
| 275 kV | High-voltage transmission |
| 300 kV | Special transmission applications |
| 330 kV | High-voltage transmission |
| 345 kV | North American transmission |
| 362 kV | IEC equipment class |
| 400 kV | Extra-high-voltage transmission |
| 420 kV | IEC equipment class |
| 500 kV | Extra-high-voltage transmission |
This table includes commonly used nominal voltages and equipment classes. Néanmoins, not every voltage level represents a standard inner cone product.
Par exemple, some manufacturers offer inner cone systems up to 52 kV, while other product families cover higher voltage classes such as 72.5 kV, 145 kV, 245 kV, or beyond. Donc, engineers should evaluate each project according to the actual cable and bushing interface.
10kV to 52kV Inner Cone Plug-In Termination
Le 10 kV à 52 kV range represents an important application area for plug-in cable accessories.
Common cable voltage ratings include:
- 6/10 kV
- 8.7/15 kV
- 12/20 kV
- 18/30 kV
- 19/33 kV
- 26/35 kV
At these voltage levels, manufacturers commonly use premoulded silicone rubber stress cones. Silicone provides good electrical insulation and maintains suitable interface pressure over a wide operating temperature range.
En outre, the compact plug-in structure allows engineers to install cable connections inside switchgear or transformer compartments with limited space.
Pour 10 kV, 20 kV, 24 kV, 30 kV, 33 kV, et 35 kV systems, the manufacturer normally selects the termination according to the cable insulation diameter and conductor cross-section.
Donc, customers should provide complete cable dimensions rather than only the voltage rating.
66kV to 145kV Inner Cone Plug-In Termination
Le 66 kV à 145 kV range enters the high-voltage cable accessory market.
Typical voltage levels include 66 kV, 69 kV, 72.5 kV, 90 kV, 110 kV, 115 kV, 126 kV, 132 kV, 138 kV, et 145 kV.
At these voltage levels, electric field control becomes increasingly important. The manufacturer must carefully coordinate the stress cone geometry with the XLPE insulation, semiconductor screen, and bushing interface.
Par exemple, un 110 kV or 132 kV cable termination cannot simply use the same structure as a 20 kV termination. Higher operating voltage requires greater insulation capability and more precise field grading.
En outre, the termination must match the GIS or transformer bushing mechanically and electrically.
CEI 62271-209 provides important requirements for cable connections between high-voltage switchgear and cables. Par conséquent, customers should check the applicable interface standard before placing an order.
170kV to 245kV Inner Cone Plug-In Termination
Le 170 kV à 245 kV range covers major transmission applications.
Les classes de tension courantes incluent:
- 170 kV
- 220 kV
- 230 kV
- 245 kV
Among these values, 245 kV represents an important IEC equipment voltage class.
A high-voltage inner cone termination requires careful control of the interface pressure. The stress cone must also maintain stable electrical performance throughout the service life of the cable system.
De plus, the manufacturer should evaluate partial discharge performance, AC withstand voltage, lightning impulse withstand voltage, and thermal characteristics.
Pour un 220 kV or 230 kV project, the customer should therefore provide the cable construction, taille du conducteur, épaisseur d'isolation, diamètre d'isolation, and GIS bushing information.
This information allows the Inner Cone Plug-In Termination manufacturer to select the correct interface and termination dimensions.
275kV to 500kV Inner Cone Plug-In Termination
Applications above 245 kV belong to the extra-high-voltage transmission field.
Potential project voltage levels include 275 kV, 300 kV, 330 kV, 345 kV, 362 kV, 400 kV, 420 kV, et 500 kV.
At these voltage levels, the termination design becomes considerably more demanding. Engineers must consider the complete electrical and mechanical system rather than the termination alone.
Important design parameters include:
- Cable conductor diameter
- Section du conducteur
- Épaisseur d'isolation XLPE
- Diamètre d'isolation du câble
- Semiconductor screen
- Stress cone geometry
- Electric field distribution
- Pression d'interface
- Performances de décharge partielle
- AC withstand voltage
- Tension de tenue aux chocs de foudre
- Switching impulse withstand voltage
- Short-circuit performance
- Performance thermique
- Mechanical interface dimensions
UN 500 kV cable system requires particularly careful engineering. The termination must work together with the cable, GIS or transformer bushing, grounding system, et environnement d'installation.
Donc, un 500 kV Inner Cone Plug-In Termination should normally involve project-specific engineering and testing. Customers should not select the product only by matching the nominal voltage.
Why Choose an Inner Cone Plug-In Termination?
The compact design provides one of the main advantages of inner cone technology.
D'abord, the plug-in connection can save installation space. This feature becomes valuable in GIS substations and compact transformer installations.
Deuxième, many designs use dry-type insulation. Donc, the installation process does not require oil-filled cable connection systems.
Troisième, the premoulded stress cone provides controlled electrical field distribution. This design helps maintain reliable insulation performance around the cable termination area.
En outre, a plug-in connection can simplify equipment connection and future maintenance when the equipment design allows removal of the cable termination.
Cependant, the installation team must follow the manufacturer’s instructions carefully. Cable preparation, semiconductor removal, stress cone positioning, contact installation, and interface cleaning all affect final performance.
How to Select an Inner Cone Plug-In Termination Manufacturer
Customers should consider several technical factors when selecting an Inner Cone Plug-In Termination manufacturer.
1. Tension nominale
Confirm the cable nominal voltage and equipment maximum voltage. These two values do not always have the same numerical value.
2. Cable Conductor Size
The conductor cross-section directly affects the termination contact and mechanical design.
Typical conductor sizes can range from small medium-voltage conductors to large transmission cable conductors.
3. Cable Insulation Diameter
The insulation diameter represents one of the most important dimensional parameters. A termination designed for one cable diameter may not fit another cable with the same nominal voltage.
4. Bushing Interface
The inner cone termination must match the corresponding GIS or transformer bushing.
Donc, customers should provide the bushing type, interface dimensions, and relevant technical drawings whenever possible.
5. Exigences de test
A qualified manufacturer should provide relevant test documentation. Depending on the voltage class, the project may require partial discharge testing, AC withstand testing, impulse testing, thermal testing, and other verification.
6. Assistance à l'installation
A reliable manufacturer should also provide installation instructions and technical support.
For large transmission projects, installation training can further reduce the risk of incorrect cable preparation.
Inner Cone Plug-In Termination Manufacturer for Global Markets
Different countries use different transmission and distribution voltage systems. Donc, an international manufacturer needs to understand multiple voltage standards.
For medium-voltage applications, customers may request 10 kV, 11 kV, 12 kV, 15 kV, 20 kV, 22 kV, 24 kV, 30 kV, 33 kV, 35 kV, ou 36 kV systems.
North American projects may use 15 kV, 25 kV, 35 kV, 69 kV, 115 kV, 138 kV, 230 kV, ou 345 kV systems.
Entre-temps, IEC-based transmission networks commonly use equipment classes such as 72.5 kV, 145 kV, 170 kV, 245 kV, 362 kV, et 420 kV.
Extra-high-voltage projects may require 400 kV, 500 kV, or other project-specific voltage levels.
Par conséquent, an experienced Inner Cone Plug-In Termination manufacturer should evaluate the complete project specification before recommending a product.
Dosense Cable as an Inner Cone Plug-In Termination Manufacturer
Dosense Cable focuses on power cable systems and cable accessories for medium-voltage, haute tension, and extra-high-voltage applications.
As an Inner Cone Plug-In Termination manufacturer, Dosense Cable can develop cable termination solutions according to voltage level, taille du conducteur, diamètre d'isolation, cable construction, Interface SIG, transformer interface, and project requirements.
For a new project, customers can provide the following information:
- Tension du câble
- Matériau conducteur
- Section du conducteur
- Type d'isolation du câble
- Diamètre d'isolation
- Épaisseur de l'isolation
- Cable screen structure
- GIS or transformer bushing type
- Courant nominal
- Environnement d'installation
- Required test standards
With these parameters, the manufacturer can determine the appropriate inner cone design and provide a technical proposal.
Un Inner Cone Plug-In Termination offers a compact and reliable connection between high-voltage cables and electrical equipment. From 10 kV medium-voltage systems to 500 kV extra-high-voltage transmission projects, different voltage classes require different insulation systems, interfaces, stress control structures, and testing procedures.
Pour cette raison, selecting the right Inner Cone Plug-In Termination manufacturer requires more than checking the voltage rating. Dimensions du câble, bushing interfaces, exigences électriques, mechanical conditions, and applicable standards should all receive careful consideration.
Dosense Cable can work with customers to develop suitable cable termination solutions for specific voltage levels and equipment interfaces.