RT-CKX8 Air-Insulated Busway

RT-CKX8 is an air insulated busway designed for low-voltage power distribution in industrial and commercial applications. This system uses air as the primary insulation medium between conductors and is suitable for connecting low-voltage distribution panels to medium and large loads.

As an air insulated busway supplier and busbar trunking manufacturer, ZHERUTONG provides RT-CKX8 for projects that require organized power routing, stable electrical performance, and flexible installation in workshops, industrial plants, and high-rise buildings.

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 highstrength 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

● Air-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. Alternatively, premium polytetrafluoroethylene (PTFE) oriented film (SFM-3) can be used, featuring an extreme temperature range (-180℃ to +250℃ ), single-layer withstand voltage of 6000V, 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: ≤ 2000m

● 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 ≥ 100MΩ (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

What Is Air Insulated Busbar Trunking?

Air insulated busbar trunking is a busway system in which air provides the main insulation between conductors inside a metal enclosure. The design maintains safe electrical clearance and creepage distance between phases and between conductors and the enclosure, making it suitable for low-voltage power distribution systems.

Key Features of RT-CKX8 Air Insulated Busway

Air Insulation Design

The interior adopts an isolated air-insulation structure to maintain safe clearance and creepage distance between phases. This design helps support stable operation in low-voltage distribution applications.

Strong Enclosure Structure

The enclosure is formed with a one-piece corrugated structure, providing compact dimensions and improved mechanical strength compared with conventional busway structures.

Reliable Insulation Materials

Phase-to-phase insulation uses high-strength epoxy resin material to improve dynamic and thermal stability. Busbar insulation can be configured with polyester film, and alternative insulation materials may be selected according to project requirements.

Flexible Tap-Off Arrangement

Tap-off openings can be arranged on the top or bottom of the busway without significantly affecting structural strength. The tap-off interfaces are designed for practical installation and branch power distribution.

Scope of Application

RT-CKX8 air insulated busway is suitable for:

modern workshops

industrial plants

high-rise buildings

low-voltage distribution systems

connections between low-voltage distribution panels and medium or large loads

Technical Scope

Frequency: 50–60 Hz

Rated voltage: up to 660V

Rated operating current: 250A–5000A

Indoor protection level: IP40

Outdoor protection level: IP43 / IP55

Installation environment: indoor and outdoor, depending on project conditions

Structural Characteristics

RT-CKX8 air insulated busbar trunking features a compact structure with good corrosion resistance, heat dissipation, and grounding performance. Its double-layer hollow enclosure design improves bending resistance and overall structural stability.

The system also uses single-arm locking vibration-damping connectors for convenient and reliable installation. This makes the busway suitable for projects that require both mechanical stability and practical assembly.

Installation and Selection Support

For air insulated bus duct installation, it is recommended to confirm the following project information before quotation and selection:

rated current

operating voltage

indoor or outdoor installation

required protection level

route length

tap-off requirement

This helps match the busway system to the project environment and distribution layout more efficiently.

FAQ

Air insulated bus duct installation

Air insulated bus duct installation should be selected according to current rating, voltage, route length, installation environment, and tap-off requirements. Proper selection helps improve installation efficiency and long-term operation.

What is a busbar trunking system?

A busbar trunking system is an enclosed power distribution system that uses copper or aluminum conductors inside a protective housing to transmit electricity from one point to another in industrial and commercial facilities.

Why aren’t busbars insulated?

Not all busbars are insulated in the same way. In many busway and busbar trunking systems, insulation is achieved through air clearance, insulation supports, insulation films, and enclosure design rather than full external insulation over every conductor surface.

What are the advantages of busbar trunking system?

Busbar trunking systems can offer organized power routing, convenient branch tapping, compact installation, and reliable power distribution in industrial and commercial projects.

Request a Quote

Looking for an air insulated busway supplier or air insulated busbar trunking system manufacturer? Contact ZHERUTONG with your project current rating, voltage, protection requirement, and installation details for quotation and selection support.