11KV Outside Electrical Junction Cabinet Cable Termination Box

Cotenle is an important supplier of modern urban distribution network equipment in China.The 11KV Outside Electrical Junction Cabinet Cable Termination Box manufactured by Cotenele has characteristics of full insulation, full sealing, and a compact structure, it efficiently and safely solves the problems of cable tapping and transitioning through flexible configurations and reliable cable connection technology.This cable junction box generally adopts a bolted connection cable joint with a rated current of 630A, which complies with DIN47636 standard.It is an ideal choice for urban network reconstruction and underground cable power supply.

Model and meanings

Main technical parameters

Working conditions

1. Ambient Temperature: Maximum temperature not exceeding +40°C, minimum temperature not lower than -30°C.

2. Wind Speed: Equivalent to 34 m/s (wind pressure not greater than 700 Pa).

3. Humidity: Daily average relative humidity not greater than 95%, monthly average relative humidity not greater than 95%.

4. Seismic Resistance and Installation Inclination: Horizontal acceleration not greater than 0.4 m/s², vertical acceleration not greater than 0.15 m/s²; installation inclination not greater than 3°.

5. Installation Environment: The surrounding air shall not be significantly polluted by corrosive, flammable gases or water vapor, and the installation site shall be free from violent vibration.

Note: If the usage conditions for ordering this product exceed the specifications stated above, please consult with our company.

Product Advantages

The 11KV Outside Electrical Junction Cabinet has belowing benefits:

1. Fully Insulated & Fully Sealed: All live parts inside the cable Junction Cabinet are strictly insulated (such as using silicone rubber) and have no exposed conductors, ensuring the safety of personnel.

2. Strong Environmental Adaptability: The shell structure of the cable branch box adopts a design that is resistant to dust, moisture, flooding, and corrosion, and can operate outdoors or even in flooded environments, truly achieving maintenance free operation.

3. Flexible & Compact Structure: The height of the cable branch box can be combined and can accommodate up to 8 incoming/outgoing lines. The cable branch box occupies a much smaller area than traditional distribution cabinets and blends beautifully with the urban environment.

4. Economical & Reliable: This cable branch box can reduce the investment in the main feeder cable and is easy to install. After cooperating with the fault indicator, the cable branch box can quickly locate the fault and improve the reliability of power supply.

5. Functionally Expandable: This cable branch box can be equipped with various electrical components such as lightning arresters, voltage indicators, transformers, RTUs/FTUs, and various sensors to support distribution automation and smart grid upgrades.

Classification of the 12kv cable branch boxes

12kV cable branch boxes are primarily classified by technical style and function:

1. American-Type Branch Box

• Features: Horizontal multi-way busbar, single-side door opening, compact structure.
• Connection Method: 600A screw-in bolted connection for main circuit; 200A plug-in connection for branch circuits (hot-swappable).
• Advantages: Small width, flexible combination, branch connector can be used for load switching.

2. European-Type Branch Box

• Features: Uses feed-through bushings as busbars, double-side door opening, clear cable arrangement.
• Connection Method: Generally uses 630A bolt-fixed cable connectors.
• Advantages: The cable routing is clear and does not require large spans of three core cables.

3. Switchgear-Type Branch Box (Ring Network Type)

• Features: Built-in SF6 load break switch or circuit breaker, with breaking capacity.
• Function: Allows circuit switching, enables ring network power supply, or isolates sections for maintenance.
• Advantages: Combines some functions of a ring main unit at a lower cost; represents an upgrade path from traditional branch boxes towards smart grids.

Selection Note: Mainstream high-quality products use silicone rubber as the primary material for cable connectors, offering far superior insulation sealing and aging resistance compared to early heat-shrinkable or EPDM materials.

Selection Guidelines:

1. Environmental Factors: If the cable branch box needs to be installed in flood prone or low-lying areas, a fully sealed water ingress protection structure with IP67 or higher protection level (such as buried type) should be selected.

2. Maintenance Needs:For situations that require extreme compactness and no maintenance, we recommend using American plug-in cable branch boxes; However, for three core, large cross-section cables with high requirements for wiring clarity, we recommend using European style cable branch boxes.

3. Network Functionality: For ring network application scenarios that require fault isolation, switch equipment type distribution boxes must be selected.

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Internal distribution diagram of 12 kv European cable junction box

Schematic diagram of 12kv European cable junction box joints:

12KV European cable junction box foundation diagram

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