Branch Joints MV | 11kV 33kV Cables
Lovink LoviSil® BRANCH Joint | MV 6/10 (11) kV – 18/30 (33) kV
Product Code: LoviSil® Branch Joint (Module Selection Required)
Lovink LoviSil® Branch Joints provide a reliable method of creating medium voltage (MV) branch connections on distribution networks, enabling cable take-offs and tees for systems commonly referred to as 11kV and 33kV class.
Designed for robust field performance, LoviSil® branch joints support polymeric and paper-insulated MV cables across 6/10 (12) kV, 12/20 (24) kV and up to 18/30 (36) kV (dependent on joint type and module selection).
Suitable cable constructions include 1-core, 3-core and 3 × 1-core arrangements, with conductor sizes up to 1,000 mm² for selected configurations.
For correct selection, the joint type (e.g. KB85 / KB95) and module choice are matched to the cable dimensions, sheath diameter and conductor format.
GO TO DOWNLOADSMV JOINTS FOR BRANCH CABLE CONNECTIONS IN MV POWER NETWORKS
The Lovink LoviSil® Branch Joint is engineered for creating dependable medium voltage branch connections — ideal where a feeder needs a controlled take-off, tee or loop in compact excavation spaces. Designed to accommodate both paper-insulated and polymeric MV cable systems, it helps simplify branching on mixed or ageing networks while keeping installation practical for field teams.
Why LoviSil for Branching?
LoviSil® uses a modular build approach to support consistent joint construction on-site, with the joint selected to suit the cable arrangement (1-core, 3-core or 3 × 1-core) and the project’s dimensional constraints.
The branch joint construction combines an ABS shell system with polyurethane resin for mechanical protection and moisture resistance, while the primary electrical insulation is formed using a liquid silicone compound designed to fill voids and support stable long-term performance.
Installation is intended to be flame-free and completed using standard tools, with final configuration determined by sheath diameter, conductor details and the chosen module set.
11kV & 33kV Class Networks (Up to 18/30 (36) kV)
For MV distribution commonly referred to as 11kV and 33kV class, LoviSil® Branch Joints cover system ratings from 6/10 (12) kV through 12/20 (24) kV and up to 18/30 (36) kV (by joint type).
Typical configurations support conductor sizes up to 1,000 mm² for selected cable designs, with options such as KB85 and KB95 used to match the cable construction and space constraints.
Where sector-shaped conductors are used, selection should account for any requirement to form the conductor to a circular profile for compatibility.
Need the right Cable Joints for your MV cables? Speak to our trusted experts to confirm suitability for your 11kV / 33kV class network application (as well as cable type, insulation, sheath/armour construction and dimensions). Thorne & Derrick International provide technical advice, quotations and fast worldwide delivery for MV joints, medium voltage cable accessories and engineered power solutions.
MV BRANCH Joint – Technical Specifications
Lovink Cable Joints – Selection Guide
Branch Joint – Key Benefits
✔ Purpose-built MV Branch Joint solution for creating take-offs, tees and compact branching points on distribution networks
✔ Supports mixed MV cable systems including paper-insulated and polymeric constructions (selection dependent)
✔ Suitable for common network classes including 11kV and 33kV, with system ratings up to 18/30 (36) kV (by joint type)
✔ Broad configuration coverage: 1-core, 3-core and 3 × 1-core arrangements with conductor sizes up to 1,000 mm² (application dependent)
✔ Reduces civils in many branching scenarios by avoiding additional jointing steps that can come with alternative branching methods
✔ Liquid silicone insulation (LoviSil®) formed within the inner shell helps fill voids and support stable insulation performance across the branch interface
✔ ABS shell + polyurethane resin encapsulation provides strong external protection against moisture ingress and harsh ground conditions
✔ Flame-free, cold-applied concept: standard tools with no heat-shrink or soldering steps stated for the system approach
✔ Modular selection (joint type + cable module) supports repeatable builds and helps simplify specification for project teams
✔ Suitable for utility upgrades, network extensions and repairs where a reliable MV branch connection is required in the field
Applications
✔ MV branch jointing for creating take-offs, tees and branching points on distribution circuits
✔ Utility and private MV networks where additional feeders or spurs are required (incl. 11kV / 33kV class projects subject to selection)
✔ Network extensions and new connections where a compact branch solution can reduce excavation and reinstatement
✔ Substations, MV switchrooms and link boxes where controlled branching or looping is needed
✔ Industrial sites, renewables and large facilities with MV distribution requiring reliable cable take-offs
✔ Upgrades and modifications on mixed or ageing circuits using paper-insulated and polymeric MV cables (selection dependent)
✔ MV repairs where the circuit design demands a branch connection rather than a straight joint
✔ Installations requiring robust external protection against moisture ingress and challenging ground conditions
Branch Joint – Additional Information
LoviSil® Branch Joints for MV networks (often described as 11kV and 33kV class) use fluid silicone (liquid insulation) as the primary insulating medium inside the joint body.
Because the silicone remains liquid, it can flow into and fill voids around key interfaces within the branch assembly — helping deliver consistent insulation coverage and reducing the likelihood of partial discharges linked to air entrapment.
On paper-insulated cables (PILC/PICAS), the fluid silicone has characteristics similar to cable grease, helping support the paper insulation by reducing the risk of it drying out.
On polymeric cables (XLPE/EPR), the electrical behaviour of the fluid silicone can simplify the insulation build-up compared with some alternative jointing approaches (subject to correct selection and cable construction).
For 36 kV class branch jointing, LoviSil® designs can incorporate geometric field control using filled stress cones.
Used together with a silicone sleeve around the connection, this supports controlled electric field distribution without extensive wrapping — helping enable a compact branch joint arrangement where excavation space is limited.
✔ Stable branching performance: fluid silicone helps insulate complex interfaces by flowing into voids and reducing air entrapment
✔ Paper & polymeric compatibility: suitable for mixed networks using PILC/PICAS and XLPE/EPR cables (selection dependent)
✔ Compact civils: branch joint layouts can reduce the need for multiple separate jointing steps in many take-off / tee scenarios
✔ External protection: ABS shell + polyurethane resin provides strong sealing against moisture ingress and harsh ground conditions
✔ Visual control: transparent inner joint and level indicators support controlled filling and on-site checks
✔ Flame-free approach: no soldering or shrinking stated for the system concept, supporting sites where flame-free jointing is preferred
Branch Joint ApplicationDownload
Lovink Product CatalogueDownload
