Advancing Medium-Voltage Systems with Epoxy Resin Bushings & Solid Insulated Switchgear

 



Introduction

Medium-voltage power distribution systems are at the heart of modern electrical infrastructure. As industries and utilities expand, the need for reliable, safe, and compact solutions has never been more critical. Traditional air-insulated switchgear and oil-insulated bushings are increasingly giving way to solid insulated switchgear (SIS) and epoxy resin bushings, which offer enhanced performance, minimal maintenance, and environmental advantages.

For distributors and project engineers, integrating these advanced solutions can differentiate offerings, improve reliability for clients, and support sustainability goals. Degatech Electric Co. Ltd. provides a comprehensive portfolio of solid insulated switchgear and epoxy resin bushings, designed to meet international standards while ensuring safety and operational efficiency. Learn more at https://chinadegatech.com/.

Understanding Epoxy Resin Bushings

What is an Epoxy Resin Bushing?

An epoxy resin bushing is an insulated conductor that passes through a grounded barrier, such as a switchgear enclosure, transformer tank, or substation wall, while maintaining electrical insulation. Unlike traditional porcelain bushings, epoxy resin bushings:

  • Are lighter and more compact

  • Offer higher mechanical strength

  • Resist moisture ingress and contamination

  • Provide longer operational lifespan

These features make them ideal for modern medium-voltage systems where compact, safe, and low-maintenance components are required.

Key Features

  1. High Electrical Strength – Epoxy resin bushings withstand voltage surges and insulation stress.

  2. Moisture and Contaminant Resistance – Encapsulation protects against humidity, dust, and pollution.

  3. Mechanical Durability – Epoxy materials resist cracking, chipping, and mechanical wear.

  4. Environmental Friendliness – Free from lead and other toxic materials, and reduce the use of SF6 in certain designs.

Applications

  • Medium-voltage transformers (12kV/24kV)

  • Gas-insulated switchgear (GIS)

  • Ring main units (RMU)

  • Industrial power centers and substations

Distributors can highlight epoxy resin bushings as a high-value product for clients seeking reliability, safety, and low maintenance.

Solid Insulated Switchgear (SIS)

Overview

Solid insulated switchgear replaces conventional air-insulated or gas-insulated switchgear with compact, polymer-based insulation. These systems are becoming standard for urban, industrial, and renewable energy installations due to their:

  • Reduced footprint

  • Minimal maintenance requirements

  • Enhanced safety and reliability

SIS units integrate vacuum circuit breakers, busbars, and protective relays within a robust polymer casing, ensuring safe and efficient medium-voltage distribution.

Advantages Over Conventional Switchgear

  1. Compact Design – Ideal for urban substations and confined industrial sites.

  2. Low Maintenance – Encapsulation protects internal components from dust and moisture.

  3. Environmental Safety – Avoids SF6 gas and reduces leakage risks.

  4. High Reliability – Withstand mechanical stress and electrical faults consistently.

  5. Scalable Solutions – Modular designs enable easy expansion of electrical networks.

Combining Epoxy Resin Bushings & SIS

The synergy of epoxy resin bushings with solid insulated switchgear delivers a high-performance medium-voltage solution. Benefits include:

  • Seamless integration for RMUs and GIS systems

  • Improved fault isolation and load management

  • Longer service life with reduced maintenance costs

  • Enhanced operational safety for personnel

For distributors, bundling SIS with epoxy resin bushings presents a premium package that addresses client demands for durability, reliability, and modern grid compliance.

Technical Insights for Distributors

Key Specifications

When promoting epoxy resin bushings and SIS, highlight specifications such as:

  • Voltage ratings: 12kV, 24kV, and 36kV

  • Current ratings: 630A, 1250A, 2000A

  • Short-circuit withstand: 25kA or higher

  • Insulation material: High-strength epoxy polymer

  • Environmental protection: IP30–IP65, depending on installation

Installation and Maintenance

  • Minimal installation effort due to compact size

  • No oil or SF6 handling required

  • Routine inspection focuses on mechanical integrity and terminal connections

  • Condition monitoring with optional IoT sensors for predictive maintenance

These features resonate strongly with modern electrical engineers and project planners, making them easier to market and upsell.

Applications Across Industries

Utilities

  • Compact SIS reduces substation footprint

  • Epoxy resin bushings allow safe integration into GIS and RMUs

  • Remote monitoring enables faster fault response

Industrial Facilities

  • High-reliability switchgear protects production equipment

  • Low-maintenance systems minimize downtime and operational costs

  • Predictive analytics optimize power distribution

Commercial and Urban Installations

  • Supports high-density power distribution in office complexes and data centers

  • Reduces environmental impact and aligns with smart-city initiatives

Renewable Energy Sites

  • Solar and wind installations benefit from modular, scalable switchgear

  • Epoxy bushings resist environmental stressors like humidity and pollution

Degatech Product Portfolio

At https://chinadegatech.com/, Degatech Electric Co. Ltd. offers:

  1. 12kV/24kV Epoxy Resin Bushings – Lightweight, durable, and safe for modern grids

  2. Solid Insulated Switchgear – Compact, modular, and maintenance-friendly

  3. Ring Main Units (RMU) – With vacuum circuit breakers and integrated monitoring

  4. Customizable Configurations – Adaptable to industrial, utility, and renewable energy applications

  5. IoT Monitoring Options – Track performance and predict maintenance needs remotely

Our solutions adhere to IEC standards, ISO 9001 certification, and provide long-term reliability for a wide range of medium-voltage systems.

Distributor Benefits

  1. Premium Product Offering – Solid insulated switchgear and epoxy bushings meet modern grid requirements.

  2. High-Margin Sales – Bundle hardware with monitoring and maintenance services.

  3. Client Retention – Offer ongoing IoT monitoring and predictive analytics services.

  4. Global Applicability – Products suitable for multiple international standards and voltage ranges.

By educating clients on the advantages of epoxy resin bushings and SIS, distributors can position themselves as forward-thinking solution providers in the power distribution market.

Case Study: Urban Substation Upgrade

A city utility upgraded a 24kV urban substation using SIS with epoxy resin bushings:

  • Footprint reduced by 40%

  • Maintenance costs dropped by 60%

  • Operational reliability improved, reducing unscheduled downtime

  • IoT monitoring enabled remote fault detection and real-time reporting

This example demonstrates the practical value of these products and their marketability for distributors.

Marketing and SEO Considerations

When promoting these products:

  • Emphasize compact design, low maintenance, and reliability

  • Highlight environmental benefits: no SF6, reduced material waste

  • Provide technical datasheets and installation guides online

  • Leverage case studies showing ROI and performance improvements

  • Use keywords: Epoxy Resin Bushings, Solid Insulated Switchgear, 12kV RMU, IoT Monitoring, Medium Voltage Switchgear, Degatech Electric

Conclusion

The convergence of epoxy resin bushings with solid insulated switchgear represents a pivotal shift in medium-voltage distribution technology. For distributors, offering these solutions expands their product portfolio, provides high-margin opportunities, and meets the evolving needs of utilities, industrial facilities, and urban projects.

Degatech Electric Co. Ltd. continues to lead in safe, reliable, and environmentally conscious medium-voltage solutions. Explore our full product range and connect with our team at https://chinadegatech.com/.

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