Vacuum Load Break Switches for Distribution Networks

Insulect’s new SF₆-free vacuum switch represents a significant step forward in sustainable switchgear technology.

The Epoxy Insulated Load Break Switch offers a reliable and environmentally friendly solution for switching and isolating loads in medium-voltage power distribution networks. Using solid epoxy insulation and vacuum interruption technology, the switch eliminates the need for SF₆ gas while delivering high dielectric strength and dependable performance.

Designed for 12 kV and 24 kV systems with up to 630 A breaking current, it features a fully enclosed, durable construction suitable for demanding outdoor environments. The switch can be operated manually or remotely, allowing easy integration with modern control and automation systems, while its lightweight, maintenance-free design ensures long-term reliability in overhead distribution applications.

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Reliable switching and isolation for medium-voltage distribution networks

The Epoxy Insulated Load Break Switch is used in medium-voltage overhead distribution networks to safely switch and isolate electrical loads. It is commonly installed on distribution poles at network sectionalising points, feeder lines, and connection points for renewable generation or industrial loads. Its reliable switching performance and optional remote-control capability make it suitable for both manual field operation and automated network management systems.

Flexible Manual and Remote Operation

The Epoxy Insulated Load Break Switch provides flexible operation options to suit a wide range of network requirements. It can be operated manually for simple field switching or equipped with a remotely controlled actuator for integration with SCADA and automated distribution systems. This flexibility allows utilities to improve network visibility and control, enabling faster response to faults and more efficient system management.

Maintenance-Free, Durable Construction

Built with a robust stainless steel enclosure and high-strength epoxy insulation, the switch is designed to perform reliably in harsh outdoor environments. Its sealed, maintenance-free construction reduces the need for routine servicing while ensuring long-term operational stability. This durability helps utilities lower maintenance costs and maintain dependable performance across distribution networks.

A smarter solution for safer network switching

The Epoxy Insulated Load Break Switch addresses the need for safe, reliable, and environmentally responsible load switching in medium-voltage distribution networks. Traditional switching equipment often relies on SF₆ gas insulation and can require higher maintenance or complex handling. This product eliminates SF₆ while providing dependable switching performance, helping utilities and network operators improve system reliability, reduce environmental impact, and simplify maintenance. It also enables quicker fault isolation and network sectionalising, helping minimise outage durations and maintain stable power supply to customers.

TECHNICAL

Features & Functionality

Functionality & Options

Load switching and isolation
Vacuum interruption technology
Local manual operation
Remote SCADA operation capability
Open/close status indication
High dielectric insulation performance
Mid-pole actuator configuration
Pole-top or mid-pole mounting
Factory-fitted cable leads or terminal palms
Surge arrester mounting below bushings

Key Technical Specifications

Rated Voltage: 12 kV / 24 kV
Rated Current: Up to 630 A
Rated Frequency: 50 Hz
Mechanical Operations: Up to 5,000 operations
Rated Short-Time Current: 16 kA (1 second, RMS)
Making Current: 40 kA (peak)
Cable Charging Current: 25 A
Line Charging Current: 1.5 A
Impulse Withstand Voltage: 150 kV (1.2 × 50 μs)
Power Frequency Withstand Voltage: 60 kV (dry)
Operating Power Supply: 24 V DC
Operating Temperature Range: –25 °C to +50 °C

EXPERIENCE

Our Projects Featuring Insulect Switchgear

Explore our project highlights to see where Insulect switchgears are making an impact.
For tailored advice on whether this solution suits your network, please connect with our team here.

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Wunghnu Solar Farm

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Fortescue Aldoga, New 275kV Substation Switchgear

ADVANTAGES

Why Choose Insulect for Vacuum Load Break Switches

Choosing Insulect means choosing a partner committed to reliability, safety, and value. Our vacuum switchgears deliver top-tier performance, protect your assets, and optimize your operational costs, ensuring your electrical infrastructure is always in expert hands.

Proven Reliability

Insulect vacuum switchgears are designed for maximum dependability. With advanced engineering and rigorous testing, our switchgears minimize downtime and ensure consistent performance, even in demanding environments. Choosing Insulect means investing in equipment you can trust to operate safely and efficiently for years.

Enhanced Safety

Safety is at the core of every Insulect product. Our vacuum switchgears significantly reduce the risk of arc flash incidents and electrical faults, protecting both personnel and equipment. Built with high-quality materials and intelligent safety mechanisms, they meet international safety standards, giving you peace of mind.

Cost-Effective Performance

Insulect switchgears combine high performance with long-term cost savings. Their low maintenance requirements, energy efficiency, and extended service life reduce operational expenses while maintaining superior reliability. This makes Insulect a smart investment for both small-scale and large-scale electrical systems.

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 DESIGN

Our team utilises advanced technology and industry knowledge to develop innovative and efficient high voltage switchgear solutions, customised to fit the unique requirements of each project.

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.

TESTING & COMMISSIONING

Professional testing and commissioning support ensures that every high-voltage switchgear system functions safely and reliably, adhering to all regulatory standards and client expectations.

TURNKEY PROJECT DELIVERY

We are able to oversee every phase from concept to completion, providing comprehensive solutions that simplify complex projects and ensure successful outcomes.

FACTORY VISITS

We facilitate client visits to our local manufacturing sites here in Australia, as well as overseas, for initial inspection as well as factory acceptance testing.