The VW3A9639 is a DNV certification kit from Schneider Electric, designed for ATV61 and ATV71 variable speed drives in size 14A. It includes shock-absorbing mounts and the mechanical fittings (profiles and brackets) required for fixing, along with fixing accessories. This kit satisfies the requirements of the DNV certification body, making it suitable for marine and offshore applications where DNV type approval is needed.
What the kit does
The kit is an accessory category of mounting and fixing accessories. Its job is to provide the mechanical interface — shock-absorbing mounts plus the profiles and brackets — that lets the drive pass DNV vibration and shock testing. If you are retrofitting a drive into a DNV-classified vessel or offshore installation, this is the kit that carries the certification paperwork. Without it, the drive alone does not satisfy the DNV body's requirements.