In real-world medium-voltage projects, engineers rarely work with one standard cable type. Instead, they face a mix of cable constructions, conductor sizes and outer diameters — often within one route.
Connecting these cables reliably is not always straightforward. In many cases, the limitation is not the cable joint itself, but the connector or clamp range that defines what can actually be installed in the field.
This creates a key challenge for grid operators, contractors and industrial asset owners:
how to connect different cable types and diameters efficiently, without adding complexity, time or risk.

The Challenge

In modern and aging medium voltage networks alike, cable combinations are unavoidable:

Polymeric cables (XLPE / EPR) connected to paper-insulated cables (PILC)
Small and large conductor cross-sections within one cable route
Different outer sheath diameters
1-core, 3-core and 3 x 1-core cable constructions
Existing assets combined with new grid extensions

This variation is typical in:

Grid renovation projects
Renewable energy connections (wind, solar, BESS)
Industrial expansions
Emergency repairs

The challenge lies in finding a cable jointing solution that can handle this diversity —
without requiring multiple joint types or additional transition points.

The connector is often the bottleneck
In practice, the Lovink joint body often supports a wider application range than expected. This is particularly true for the Lovink Transition Joint series.
However, limitations usually arise from:

Connector size range
Cable entry compatibility
Clamp or crimping constraints
Installation limitations on site

This creates unnecessary complexity:

Additional joints
Longer cable routes
More excavation
Higher installation risk

A smart jointing concept must therefore go beyond the joint itself —
it must consider the full combination of joint + cable module + connector solution.

Modular cable jointing for maximum flexibility

LoviSil® cable joints are designed as a modular system.
By combining base modules, cable modules and resin modules, the system adapts to different cable configurations and diameters.

This modular approach enables:

• A wide range of cable combinations in one concept
• Consistent installation methods across applications
• Less variances means less stock value
• Variations in cable modules make a jointer very flexible in the field
• Reduced dependency on multiple joint types

Across the product range:

• Maximum flexibility for both PILC and Polymeric Cables
• Connection of Different diameters of both types in one joint
• Flexibility with 1-core entry and 2 core exit cables
• Flexibility with cable looping inside the joint saving space and time

With the right cable entry kit and connector selection, different cable diameters can be connected within one joint concept.

Less complexity. More flexibility. Faster installation.
A modular and wide-range cable jointing concept directly impacts project performance:

• Reduced engineering complexity : Standardised solutions for multiple cable configurations
• Fewer joints required : Less need for additional transition joints
• Shorter cable routes :Direct connections between different cable types
• Faster installation :Uniform installation method across projects
• Lower risk : Less dependency on exact cable matching

Wide applicability across the LoviSil® portfolio
The flexibility of the LoviSil® range is reflected in its application window:

Supports conductor sizes up to 1000mm² and sometimes even 1200mm² depending on application see [transition joints]
Suitable for 1-core, 3-core and 3 x 1-core cables
Applicable in 12, 24 and 36 kV networks
Compatible with both PILC and polymeric cable types

The key takeaway:
the joint system is rarely the limiting factor — the right configuration unlocks the full range.

Designed for modern grid challenges
In renewable energy projects, cable variation is even more common:

Different cable sizes between turbines or solar arrays and Ring Grid networks
Mixed cable types across expansions, upgrades or renewals
High time pressure during installation
Limited space for additional joints

On the page Fast renewable grid integration
Lovink already shows how cable joints can replace traditional switchgear dependencies and accelerate grid connection.
Connecting different cable diameters and types is a natural extension of that challenge.

Where flexibility in cable jointing is critical

• Wind farm grid connections
• Solar park installations
• Battery storage (BESS) connections
• Grid reinforcement and underground infrastructure

Explore how cable joints support these applications:
Joints for Renewable Energy

Downloads or redirects to support

• Cable jointing in Renewable Energy
• LoviSil® Product overview
• Product Selection Tool (choice support)