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Epoxy Resin Bushings

Compact and Lightweight Design
High Mechanical and Electrical Stability

Lighter, Stronger, More Flexible Insulation

Epoxy resin insulation material offers different characteristics compared to porcelain. It is lighter, more durable, and more flexible. Epoxy resin bushings are cast as one piece and do not require assembly.  We offer a wide range of non-condenser epoxy resin bushings for low voltage and medium voltage applications.

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Application Overview

COMEM epoxy resin bushings are designed for use in oil‑filled transformers, switchgear, and electrical machines, where compact design and reliable insulation are essential. These bushings are suitable for:

  • Low‑ and medium‑voltage transformer connections
  • Plug‑in cable interfaces and busbar connections
  • Indoor installations and selected outdoor applications with connectors
  • Vertical or horizontal mounting configurations

Their solid cast construction and standardised interfaces make them well suited for both new equipment designs and retrofit applications.

What We Solve For

Traditional bushing solutions can be heavy, fragile, and complex to install or store. COMEM epoxy resin bushings address these challenges by offering:

  • A one‑piece, cast design with no assembly required
  • Reduced weight compared to porcelain bushings
  • Improved resistance to mechanical stress and handling damage
  • Simplified logistics, storage and installation

These advantages help reduce installation time, minimise maintenance requirements, and support more compact transformer and switchgear designs.

TECHNICAL

Features & Functionality

One‑Piece Cast Construction
One‑Piece Cast Construction

Each bushing is cast as a single epoxy resin component, eliminating assembly steps and reducing potential failure points.

Compact and Lightweight Design
Compact and Lightweight Design

Epoxy resin insulation offers lower weight and smaller dimensions than porcelain, supporting space‑efficient equipment layouts.

Standardised Plug‑In Interfaces
Standardised Plug‑In Interfaces

Available with interfaces in accordance with EN 50181, enabling safe and repeatable cable and connector connections.

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High Mechanical and Electrical Stability

The solid resin structure provides excellent dimensional stability, dielectric strength, and resistance to vibration and handling stresses.

Functionality & Options

  • Non‑condenser epoxy resin insulation

  • Plug‑in bushings with outer cone (PPS) and inner cone (PPQ) designs

  • Busbar bushings for low‑voltage applications (BT range)

  • Vertical or horizontal mounting

  • Fixing by flange or brackets

  • Optional accessories such as grounding plates and protective covers

  • Configurations compliant with EN 50180, EN 50181 and EN 50387

     

Key Specifications

  • Voltage range: Low to medium voltage (up to 42 kV depending on type)

  • Rated current: Up to 6300 A (product dependent)

  • Insulation material: Cast epoxy resin

  • Design: One‑piece, solid insulation

  • Interfaces: EN 50181 plug‑in systems

  • Installation: Indoor standard, selected outdoor applications

  • Standards: IEC, EN and utility‑specific approvals

Downloads

COMEM Epoxy Resin Bushings Catalog

Brochure
ADVANTAGES

Why Choose COMEM Epoxy Resin Bushings

Designed for reliability, practicality and long‑term performance, COMEM epoxy resin bushings combine proven insulation technology with a compact, one‑piece design. They offer asset owners and manufacturers a dependable, widely adopted solution that simplifies handling and installation while meeting demanding utility and industry requirements.
 
Proven Technology
COMEM epoxy resin bushings are based on established insulation designs that have been successfully applied across a wide range of transformer and switchgear installations, delivering reliable electrical and mechanical performance.
Large Installed Base
With extensive use across utility and industrial applications, these bushings benefit from a large global installed base, providing confidence in long‑term performance and availability.
Easy to Store and Handle
The robust, lightweight epoxy resin construction simplifies transport and storage, reduces breakage risk, and allows easier handling compared to traditional porcelain alternatives.
Homologated by ENEL
Selected epoxy resin bushing ranges are approved and homologated by ENEL, supporting compliance with utility specifications and project requirements.
IMPLEMENTATION

Services & Support

Insulect offers comprehensive services and support for the products we manufacture and specialise in, enhancing value for local utilities, major energy users, equipment manufacturers, and service operators. 

LOCAL TECHNICAL TEAM

Our local technical team provides exceptional support and expertise, ensuring quick response times and personalised service to tackle any challenges that may arise during project execution.

  
ENGINEERING EXPERTISE

Through COMEM, our team utilises advanced technology and industry knowledge to assist customers.


  
PROCUREMENT & LOGISTICS

We facilitate smooth procurement and logistics processes by sourcing from trusted, proven partners and coordinating timely deliveries, ensuring projects remain on schedule and within budget.


  
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