Proper installation is vital to maintaining the safety ratings achieved during manufacturer testing. Key guidelines include: 1. Environmental & Physical Positioning IEC 61439 vs IEC 60439 - Schneider Electric Community
If you are installing a PDF for a new project, consider buying instead. Many search engines will redirect "604391" to "61439-1" due to common typos.
For more detailed information, look for the IEC 60439-1:1999 standard on iTeh Standards .
Use a calibrated torque wrench to tighten all electrical connections to the manufacturer's specified values. iec 604391 pdf install
Assemblies must be installed on a level, solid foundation capable of supporting their weight under static and dynamic loads (such as short-circuit forces).
The standard, which previously governed the installation and construction of low-voltage switchgear and controlgear assemblies, has been officially withdrawn and replaced by the IEC 61439 series.
Ensure the floor or mounting structure is completely level. Uneven foundations introduce mechanical stress into the frame, causing door misalignment and compromising busbar tolerances. Proper installation is vital to maintaining the safety
Clean any paint or protective coatings away from the grounding connection points to guarantee metal-to-metal continuity. 5. Pre-Commissioning Tests and Inspections
Secure the assembly to a stable surface or floor, ensuring proper access for maintenance.
Vacuum the interior of the panel to remove any loose copper clippings, stray screws, or construction dust. Wire fragments left behind can cause a catastrophic short circuit when energized. Many search engines will redirect "604391" to "61439-1"
Within the first weeks of standard operations, perform a professional infrared thermography audit under normal load. Any loose bolt or poor connection will instantly register as a distinct thermal hot spot, allowing you to fix it before a component fails.
: Proper installation according to the standard helps ensure that the electrical assemblies operate reliably and efficiently. This reduces the risk of downtime and maintenance issues, which can be costly and disruptive.
Air should be clean and humidity should not exceed 50% at a max temperature of +40°C.
Before energizing the low-voltage switchgear assembly, a series of standardized tests must confirm that the installation process has not compromised the equipment. Visual and Mechanical Checks
Cables must be properly supported using cable cleats or trays before entering the enclosure. The weight of heavy power cables must never rest on the internal terminal blocks or circuit breaker lugs.
