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Summary
The LS-MX enclosed busway (also referred to as enclosed busbar) is a busbar system composed of a metal enclosure (steel plate, aluminum plate, or fire-resistant panel) as the protective housing, conductive bars (copper bars, aluminum bars, or copper-aluminum composite bars) as the current-carrying conductors, along with insulating materials, mounting hardware, and accessories. It covers isolated-phase busways, non-segregated phase busways, and cable busways, and is widely used in power plants, substations, and industrial and commercial power supply systems.
Structural Characteristics
- Aluminum-magnesium alloy enclosure for lighter weight, better sealing, and improved heat dissipation; the specialized structure provides sufficient mechanical strength to support and protect the busway system;
- Pre-assembled connection method enables faster installation;
- Purpose-built connectors simplify busbar connections and accelerate the installation process;
- High-grade insulating materials for enhanced safety;
- Conductor surface coated with multi-layer Class B (130°C) polymer film up to 0.5mm thick;
- Tin-plated conductor contact areas reduce contact resistance and prevent electrochemical corrosion;
- Enclosure provides IP40 to IP65 or higher protection rating (excluding ventilation openings).
Standards Compliant
- GB/T8349.2-2020 Metal-Enclosed Busbars (core standard);
- GB7251.6-2019 Low-Voltage Switchgear and Controlgear Assemblies – Part 6: Busbar Trunking Systems (Busways);
- GB/T11022-2011 Common Specifications for High-Voltage Switchgear and Controlgear Standards (applicable to enclosed busways);
- GB4208-2017 Degrees of Protection Provided by Enclosures (IP Code);
- GB/T50149-2010 Code for Construction and Acceptance of Busbar Installation in Electrical Equipment Installation Engineering;
- GB/T2424.25-2021 Environmental Testing – Reliability Requirements for Vibration and Seismic Conditions;
- GB/T14848-2017 Water Quality for Industrial Use (enclosure corrosion protection and environmental compatibility).
Technical Parameter
- Rated voltage: 380–660V;
- Rated current: 400A–5000A;
- Rated frequency: 50Hz;
- Power-frequency withstand voltage: 3500V;
- Heat resistance class: Class B;
- Insulation class: Class B;
- Busbar system: TN-S, three-phase five-wire;
- Busbar structure: Compact type (including tap-off openings);
- Protection rating: IP54;
- Tap-off box plug-in device: Silver-plated plug pins rated for 200+ insertion cycles, with good interchangeability and temperature rise compliance;
- Conductor temperature rise: Temperature rise at the busbar conductors, busbar connectors, and tap-off box plug contacts does not exceed 70℃.
Application
- Indoor ambient air temperature: -15℃ to +40℃;
- Indoor installation altitude: ≤2000m;
- Ambient relative humidity: ≤90% (at +25℃);
- Environmental pollution class: Class II;
- Seismic intensity: ≤8°, in locations without severe vibration.
