Non-segregated bus duct designed for cost-effective, low maintenance, long-term power connections

Developed for the most demanding industrial and power generation environments, Avail’s non-segregated phase bus duct represents an innovative design that ensures effective system performance while being cost-effective and low maintenance. Avail’s single-bar design reduces installation costs, minimizes hardware at splice connections, and decreases install time. The 3-phase, 4-wire non-seg bus system (available in both full and half neutrals) and 2-pole DC bus enhance efficiency across various applications, including utility plants, petroleum plants, chemical plants, and marine environments.

Enhance durability and customization in non-segregated phase bus duct

Avail’s non-segregated phase bus duct systems offer enhanced durability and customization options to meet specific client needs. The non-seg bus ducts are constructed with high-quality materials, ensuring long-lasting performance even in the harshest conditions. Customers can choose between copper or aluminum epoxy-coated conductors based on your specific requirements. Furthermore, Avail provides a range of customization options, including different enclosure types and configurations, to seamlessly integrate with existing infrastructure. This flexibility makes Avail’s non-segregated phase bus ducts an ideal solution for various industrial applications, ensuring reliable power distribution and minimizing downtime.

Designed to meet NEMA 3R standards for challenging environments

Avail’s non-segregated phase bus ducts are designed to meet NEMA 3R standards, providing reliable, weather-resistant performance suitable for various applications and challenging environments. Trust Avail for durable, efficient, and cost-effective non-segregated bus duct solutions.

Innovative isolated phase bus duct systems to meet global demands

Around the world, Avail’s medium voltage isolated phase bus duct systems are deployed in a wide range of critical applications that require the highest degree of reliability. For decades, plants and facilities have relied on Avail’s expertise in custom-designed solutions to deliver unmatched performance in iso phase bus ducts.

Avail isolated phase bus systems, used as generator main leads extending to GSU transformers and excitation service/auxiliary transformers, offer a cost-effective, fully integrated solution for multiple applications, including hydro plants, nuclear power stations, combined cycle power plants, fossil plants, and renewable plants. 

The advantages of a value-based iso phase bus duct partner

As a single-source provider, Avail offers cost efficiency not available with other isolated phase bus system suppliers. Our welded in-plant elbows and t-taps are easier to install, reducing field costs. Additionally, our extensive shipping capabilities, including transporting 40-foot sections with all three phases on a single skid, further reduce field costs.

1. Generator termination, 2. Potential transformer/surge arrester cubicle, 3. Generator circuit breaker connection, 4. Firewall and generator tie connection, 5. GSU transformer connection

Engineered for optimal performance in isolated phase bus systems

With Avail’s advanced design, each phase in our isolated bus duct is mounted in individual enclosures. The conductors are air insulated and supported in the center phase enclosures by strategically arranged insulators. This safer approach ensures maximum system integrity by eliminating phase-to-phase short circuits. Our insulated saddle supports prevent current induction in steelwork, cables, pipes, or other metal structures. Avail can design and install the entire isolated phase bus system, including interfaces with major manufacturers of generators, generator circuit breakers, and transformers.

Ratings

• Current: 600–25,000 (air-cooled), up to 50,000 amps (forced-air cooled)
• Voltage: 15kV–38kV
• Insulation levels: 110–200kV (BIL)
• Momentary current: Up to 1,000,000+ Amps Asymmetrical
• Standards: Meets or exceeds ANSI/IEEE and IEC Standards

Choose Avail for your isolated phase bus duct to experience innovative solutions that provide superior reliability and performance in medium voltage applications.