RT-CKX8 Air-Insulated Busway

Product Overview

RT-CKX8 Air-Insulated Busway Developed through optimized improvements based on conventional air-insulated busway technology,this product utilizes electrolytic copper with 99.99%purity for its conductors.The copper busbars are wrapped with polyester insulation film and further protected by PVC heat-shrink tubing,significantly enhancing their insulation performance.Phase separators and external enclosures are spaced using flame-retardant insulation blocks,all assembled within a well-grounded metal enclosure to ensure stable electrical and mechanical performance.The enclosure is fabricated from high-quality cold- rolled steel or aluminum profiles,with surface treatment including electrostatic spraying for improved corrosion resistance.

 Available protection ratings include IP30,IP40,and IP54,allowing flexible selection based on installation environments.The busway supports current capacities from 160A to 5000A.Tap-off openings can be added at any position along the busway,enabling quick installation,convenient power tapping,and safe operation.Alternatively,the enclosure can be manufactured as a single-piece extruded aluminum alloy profile with anodized surface treatment,offering streamlined aesthetics,lightweight construction,high mechanical strength,efficient heat    dissipation,and excellent dynamic/thermal stability.With IP54 protection,it suits outdoor installations and rain-exposed locations.The aluminum enclosure provides reliable grounding  continuity,low reactance,and can function as a grounding conductor.The system ensures easy installation,operational safety,and energy efficiency.

Comprehensive system components are available,with lengths ranging from 0.5 to 6 meters and current ratings from 400A to 5000A,meeting diverse project requirements for different  protection classes,span configurations,and current capacities.This product is widely applicable in power distribution centers,high-rise commercial/residential buildings, and other large-scale power distribution trunk systems. 

Product Features

The interior employs an isolated air-insulation design,ensuring both the safe clearance and  creepage distance between phases significantly exceed the requirements specified by national  standards.The phase-to-phase insulation within the equipment utilizes high-strength epoxy  resin material,effectively enhancing the busway's dynamic and thermal stability to maintain  reliable operation under extreme conditions.The enclosure is formed with a one-piece corrugated structure through bending technology,resulting in a compact size and elegant appearance while substantially improving the mechanical load-bearing capacity compared to conventional busways.

Scope of Application

Air-insulated busways are suitable for AC three-phase four-wire and three-phase five-wire systems,with a frequency of 50-60 Hz,rated voltage up to 660V,and rated operating current ranging from 250A to 5000A.They serve power distribution functions,connecting low-voltage distribution panels to medium and large loads,and are primarily used in modern workshops,industrial plants,and high-rise buildings.

Structural Characteristics

• AI-insulated busways feature a compact design with excellent corrosion resistance, heat dissipation, and grounding performance. Their unique double-layer hollow structure provides each enclosure segment with pipe-like bending resistance, significantly enhancing the overall system's torsional strength.
• The system incorporates standard single-arm locking vibration-damping connectors for reliable and convenient installation.
• Power tap-off openings can be flexibly arranged on both top and bottom surfaces without compromising bending resistance. These tap-off interfaces achieve IP5X protection rating (compliant with IEC 60529).
• Insulation Configuration.
• Busbar insulation utilizes high-efficiency polyester film, which offers superior high-temperature resistance (no toxic gas emission under extreme heat) and dielectric properties, rated as Class B insulation. Premium polytetrafluoroethylene(PTFE)oriented film (SFM-3) can be used, featuring an extreme temperature range (-180℃ to +250℃), single-layer withstand voltage of 6000 V, Class C insulation rating, and insulation aging life exceeding 50 years, representing the highest-performance insulation material currently available.

Work Environment

• Ambient Temperature: Upper limit: +40℃; Lower limit: -25℃; Altitude: ≤ 2000 m.
• Humidity: Relative humidity ≤ 50% at +40℃; higher relative humidity permitted at lower temperatures.
• Condensation: Possible; Seismic Intensity: Designed for magnitude 6; Installation: Indoor/Outdoor.
• Insulation Resistance: Each enclosed busway unit shall have insulation resistance ≥ 100 MΩ (measured with 2500V megohmmeter).
• Dielectric Strength: Each busway section withstands 1-minute power-frequency dry withstand voltage test before shipment. Test values comply with national standards for power-frequency and lightning impulse withstand voltages.
• Grounding System: Complies with IEC 60364-5-54 requirements.
• Protection Rating: Indoor type: IP40; Outdoor type: IP43/IP55.
• Load Performance: At rated current, enclosure temperature rise meets GB 763 - 90 standards for AC high-voltage equipment under continuous operation.
• Short-Circuit Performance: Dynamic and thermal stability tests conform to GB 2706 - 89 standards for AC high-voltage equipment testing methods.

Performance parameter table