110kV ケーブルの屋外終端

1. Introduction to 110kV Cable Outdoor Termination

A 110kV cable outdoor termination plays an important role in high-voltage power transmission systems. It connects XLPE power cables to outdoor electrical equipment, 変圧器などの, 開閉装置, and overhead transmission lines.

今日, many cities and industrial areas use underground high-voltage cables. These cables help reduce visual pollution and improve the use of land. しかし, they need reliable accessories to connect with other electrical equipment.

A 110kV outdoor cable termination provides this connection. It also controls the electric field at the end of the cable and protects the insulation system.

Unlike indoor cable terminations, outdoor types must work in different weather conditions. 例えば, they need to withstand rain, 日光, 湿度, 風, そして汚染. したがって, manufacturers must pay close attention to insulation design and outdoor protection.

2. What Is a 110kV Cable Outdoor Termination?

A 110kV cable outdoor termination is a high-voltage accessory that connects an XLPE cable to outdoor electrical equipment.

You can find these products in power substations, 産業プラント, 再生可能エネルギープロジェクト, and transmission networks.

The termination performs three main functions.

初め, it controls the electric field. When the metallic screen of an XLPE cable ends, the electric field can become concentrated around the cable insulation. A proper stress control system helps reduce this problem.

2番, it provides electrical insulation. The insulation system separates the high-voltage conductor from grounded parts. 結果として, it helps prevent electrical breakdown.

三番目, it protects the cable connection. The outdoor housing protects the internal parts from rain, 水分, ほこり, およびその他の環境要因.

For IEC-based 110kV power systems, the maximum equipment voltage is commonly 123kV (Um = 123kV). しかし, engineers should always check the project specifications before selecting the termination.

3. Main Components of a 110kV Outdoor Cable Termination

A 110kV outdoor cable termination contains several important parts. Each part has a specific function. 一緒に, they provide reliable insulation and electrical connections.

3.1. 導体コネクタ

The conductor connector joins the cable conductor to the external electrical equipment.

Manufacturers usually make these connectors from copper or aluminum. The material must match the cable conductor and connection design.

A good connector should provide:

• Low electrical contact resistance.
• 高い導電性.
• 優れた機械的強度.
• Reliable contact during operation.
• Suitable short-circuit current capacity.

For large conductor sizes, the connector design also needs to consider conductor diameter and compression requirements.

3.2. Electric Field Stress Control System

The stress control system is one of the most important parts of a high-voltage cable termination.

At the end of the semiconductive screen, the electric field changes sharply. This change may create high electrical stress in a small area. 時間とともに, excessive stress can lead to partial discharge and insulation failure.

To solve this problem, the termination uses a special stress control component. It helps distribute the electric field more evenly around the cable insulation.

Depending on the product design, manufacturers may use prefabricated stress cones or other field control structures.

A well-designed system reduces electrical stress and improves the service life of the termination.

3.3. 主絶縁体

The main insulation separates the energized conductor from grounded components.

Most modern 110kV outdoor cable terminations use prefabricated insulation parts. Silicone rubber is a common material because it offers good electrical and environmental performance.

The insulation must fit the cable correctly. したがって, manufacturers need to consider the insulation diameter, thickness, and cable structure when designing the termination.

3.4. Silicone Rubber Insulator Housing

The external housing protects the insulation system from outdoor conditions.

Silicone rubber is widely used in modern high-voltage outdoor terminations. It offers several useful advantages:

• Excellent water-repellent properties.
• Good resistance to pollution.
• Strong UV resistance.
• Low weight.
• Good flexibility.
• Excellent outdoor performance.

加えて, silicone rubber can help reduce surface leakage current under wet and polluted conditions.

このため, many power companies choose silicone rubber outdoor terminations for modern substations.

3.5. Porcelain Insulator Housing

Porcelain is another common material for high-voltage outdoor cable terminations.

It provides high mechanical strength and stable electrical insulation. さらに, porcelain has a long history of use in power transmission systems.

しかし, porcelain housings are heavier than silicone rubber designs. They also need careful handling during transportation and installation.

したがって, engineers should compare both materials before making a final decision.

3.6. Grounding and Sealing System

The grounding system connects the metallic screen of the cable to the grounding network.

The actual grounding method depends on the cable bonding design. Common methods include single-point bonding, 両端ボンディング, and cross-bonding.

その間, sealing components prevent water and moisture from entering the termination.

A reliable sealing system helps protect the internal insulation and maintain long-term electrical performance.

4. Types of 110kV Cable Outdoor Terminations

Manufacturers offer different outdoor termination designs for 110kV XLPE cable systems. The best choice depends on the project requirements and installation conditions.

4.1. Silicone Rubber Outdoor Termination

Silicone rubber outdoor terminations are popular in modern power transmission projects.

Their lightweight design makes transportation and installation easier. 加えて, silicone rubber provides excellent resistance to moisture, 汚染, and ultraviolet radiation.

Main advantages include:

• 軽量構造.
• Good hydrophobic performance.
• Excellent pollution resistance.
• Strong weather resistance.
• Easy transportation.
• Convenient installation.

結果として, these products are suitable for outdoor substations, 産業施設, および再生可能エネルギープロジェクト.

4.2. Porcelain Outdoor Cable Termination

Porcelain outdoor terminations have been used in high-voltage power networks for many years.

Their main advantages include high mechanical strength, stable insulation performance, and good heat resistance.

しかし, porcelain is relatively heavy and can break under strong mechanical impact.

したがって, installation teams must handle these products with care.

4.3. Prefabricated Outdoor Cable Termination

Prefabricated cable terminations use factory-made insulation components.

Manufacturers design these components according to the cable dimensions and electrical requirements. This approach helps improve product consistency and reduce installation work.

さらに, prefabricated designs can reduce the risk of errors during on-site assembly.

しかし, installation teams must still follow the manufacturer’s instructions and prepare the cable surface correctly.

5. Technical Specifications of 110kV Cable Outdoor Terminations

The technical specifications of a 110kV outdoor cable termination depend on the system voltage, cable design, 導体サイズ, および設置環境.

For many IEC-based 110kV systems, the maximum equipment voltage is 123kV.

The following table shows typical reference specifications.

These values serve as a technical reference. Actual dimensions and electrical test levels must follow the approved project specifications.

Engineers should also check the creepage distance, 雷インパルス耐電圧, and power frequency withstand voltage before selecting the product.

6. International Standards for 110kV Cable Terminations

International standards help ensure the safety and reliability of high-voltage cable accessories.

For 110kV XLPE cable systems, IEC 60840 is one of the most important standards.

6.1. IEC 60840

The full title of IEC 60840 is:

Power cables with extruded insulation and their accessories for rated voltages above 30 kV (1 つ = 36 kV) まで 150 kV (1 つ = 170 kV) – Test methods and requirements.

This standard covers high-voltage cables and their accessories, including cable joints and terminations.

It includes requirements for several important tests:

• 型式試験.
• 定期テスト.
• Electrical withstand tests.
• 部分放電試験.
• Lightning impulse voltage tests.
• Tests after installation.

For a typical 110kV cable system with Um = 123kV, IEC 60840 provides an important basis for product design and testing.

6.2. IEC 60270

IEC 60270 covers partial discharge measurement techniques.

Partial discharge testing helps identify small electrical discharges inside insulation. These discharges may damage the insulation over time.

したがって, this test plays an important role in checking the quality of high-voltage cable accessories.

6.3. IEC 60060

IEC 60060 covers high-voltage test techniques.

It provides guidance for electrical testing and voltage measurement. Manufacturers and testing laboratories use these methods to check the insulation performance of high-voltage equipment.

6.4. IEC 60815

IEC 60815 provides guidance for selecting outdoor insulation under polluted conditions.

This standard is especially useful for projects in coastal areas, 工業地帯, and regions with heavy pollution.

By considering the local pollution level, engineers can select a suitable creepage distance for the outdoor termination.

7. Installation Process of a 110kV Outdoor Cable Termination

Correct installation is essential for the safe operation of a 110kV cable system.

Even a high-quality termination may fail if technicians prepare the cable incorrectly. したがって, qualified technicians must follow the manufacturer’s installation instructions.

ステップ 1: Inspect and Prepare the Cable

初め, technicians should check the cable structure and dimensions.

Important measurements include:

• 導体径.
• Insulation outer diameter.
• 断熱材の厚さ.
• Metallic screen structure.
• アウターシース径.
• Overall cable diameter.

They should also check the cable end for damage before starting the installation.

ステップ 2: Remove the Outer Sheath and Metallic Screen

次, technicians remove the outer sheath, 金属スクリーン, and semiconductive layers.

They must follow the specified cutting dimensions. さらに重要なことは, they should avoid damaging the XLPE insulation.

Even small scratches may affect the electrical performance of a high-voltage termination.

ステップ 3: Prepare the XLPE Insulation Surface

The XLPE insulation surface must be smooth, クリーン, and dry.

Technicians should remove dust, grease, and other foreign materials. They must also check the surface for scratches and sharp edges.

Proper surface preparation helps ensure good contact between the cable insulation and the termination components.

ステップ 4: Install the Stress Control Components

After preparing the cable, technicians install the electric field stress control components.

Correct positioning is essential. If the components are installed incorrectly, the electric field may not follow the designed distribution.

したがって, technicians must check all installation dimensions carefully.

ステップ 5: Install the Main Insulation and Housing

次, the installation team fits the main insulation body and outdoor housing.

They should check the position of every component. 加えて, all sealing areas must remain clean and properly connected.

ステップ 6: Connect the Cable Conductor

Technicians then install the conductor connector.

The connection must provide good electrical contact and sufficient mechanical strength. They should also follow the specified compression or connection method.

ステップ 7: Complete Grounding and Final Inspection

The metallic screen must connect to the grounding system according to the approved cable bonding design.

その後, technicians should inspect the complete termination. They must check the connector, insulation body, housing, sealing parts, and grounding connections.

ステップ 8: Perform Electrical Tests

ついに, the cable system must pass the required electrical tests before operation.

Depending on the project, these tests may include AC voltage withstand tests and partial discharge measurements.

The testing method and voltage level must follow the applicable standard and approved project requirements.

8. Applications of 110kV Outdoor Cable Terminations

110kV outdoor cable terminations serve many types of power transmission projects.

8.1. Power Substations

Power substations are one of the main applications.

Outdoor terminations connect underground high-voltage cables to transformers, circuit breakers, およびその他の電気機器.

They help transfer electrical energy between different parts of the power network.

8.2. Wind and Solar Power Projects

Renewable energy projects need reliable high-voltage connections to deliver electricity to the grid.

例えば, wind farms and large solar plants often use 110kV cable systems in their collection and transmission networks.

Outdoor cable terminations provide reliable connections at substations and cable connection points.

8.3. 産業用電源システム

Large industrial plants often need stable and high-capacity power supplies.

採掘作業, 製鉄所, petrochemical plants, and manufacturing facilities may use 110kV cables to connect their electrical systems.

In these projects, reliable cable accessories help reduce the risk of power interruptions.

8.4. Underground Power Transmission

Many cities use underground cables to reduce the need for overhead transmission lines.

These systems also help save space in areas with high population density.

しかし, underground cables still need outdoor connections at substations. A 110kV outdoor termination provides this important connection.

8.5. Power Generation Plants

火力発電所, hydropower stations, and other generation facilities use high-voltage cables to connect generators and electrical equipment to transmission networks.

In these applications, outdoor terminations help maintain safe and stable power transmission.

9. How to Choose a 110kV Cable Outdoor Termination Manufacturer

Choosing a reliable manufacturer is important for every high-voltage cable project.

EPC請負業者, power companies, 販売代理店, and engineering companies should consider several factors before placing an order.

1. Confirm the Voltage Rating

初め, check the rated system voltage and maximum equipment voltage.

For a typical IEC-based 110kV system, the maximum equipment voltage is 123kV.

2. Check Cable Compatibility

The termination must match the cable conductor size and insulation dimensions.

You should provide the manufacturer with the cable data sheet and cable structure drawing. This information helps the manufacturer select the correct product.

3. Select the Right Insulation Material

Silicone rubber and porcelain are two common choices.

しかし, the final selection should consider pollution, 湿度, 温度, および設置条件.

4. Check Electrical Test Reports

Ask the manufacturer for relevant type test reports and routine test records.

These documents help verify product quality and compliance with project requirements.

5. Review Installation Support

A professional supplier should provide technical drawings, インストール手順, and product specifications.

さらに, technical support can help reduce installation errors on site.

6. Evaluate Manufacturing Experience

High-voltage cable accessories require careful design and strict quality control.

したがって, buyers should review the manufacturer’s experience, production facilities, technical team, and quality management system.

10. Frequently Asked Questions About 110kV Cable Outdoor Terminations

Q1. What is the difference between 110kV indoor and outdoor cable terminations?

The main difference is the external insulation design.

Outdoor terminations have insulating sheds or housings that protect the product from rain, 日光, 水分, そして汚染.

Indoor terminations do not need the same level of weather protection because they operate inside buildings or electrical enclosures.

第2四半期. What is the maximum voltage of a 110kV cable termination?

For many IEC-based 110kV systems, the maximum equipment voltage is 123kV (Um = 123kV).

しかし, buyers should always check the project specifications before ordering.

Q3. Which material is better for outdoor cable terminations: silicone rubber or porcelain?

Both materials can provide reliable insulation.

Silicone rubber offers lower weight and excellent pollution resistance. 対照的に, porcelain provides high mechanical strength and a long history of use.

The best choice depends on the project environment and technical requirements.

Q4. Which IEC standard applies to 110kV cable outdoor terminations?

IEC 60840 is a key standard for extruded-insulation power cables and their accessories with rated voltages above 30kV and up to 150kV, within its specified maximum equipment voltage range.

Q5. Can a 110kV outdoor termination work with copper and aluminum conductors?

はい. Manufacturers can design terminations for both copper and aluminum conductors.

しかし, the conductor connector must match the conductor material, size, and connection requirements.

Q6. How long can a 110kV outdoor cable termination operate?

The service life depends on product quality, 断熱材, インストール方法, and operating conditions.

Regular inspection and proper maintenance can also help extend the service life of the cable accessory.

11. Dosense Cable – 110kV Cable Outdoor Termination Manufacturer

Dosense Cable is a manufacturer of high-voltage power cables and cable accessories for global power transmission and distribution projects.

As a 110kV cable outdoor termination manufacturer, Dosense Cable provides solutions for XLPE high-voltage cable systems.

Our products can meet different project requirements for conductor materials, cable cross-sections, insulation dimensions, および設置条件.

We focus on electric field control, 断熱性能, sealing design, and reliable electrical connections. 加えて, we work to provide suitable solutions for different substation and industrial power projects.

Dosense Cable also offers high-voltage cable joints, GIS ケーブル終端, and other power cable accessories.

Whether you are an EPC contractor, power utility, engineering company, or cable distributor, our team can provide technical information and product solutions for your project.

Contact Dosense Cable today to get more information about our 110kV Cable Outdoor Termination products. Request technical drawings, 製品仕様, and a competitive quotation for your next high-voltage cable project.