The VW3A68190 is an earth fault detection kit from the Schneider Altivar range, designed specifically for the ATV 68 speed drive. It ships as a single IP21 cover that provides IP21 protection conforming to UL Type 1.
What the IP21 rating means for installation
IP21 conforming to UL Type 1 means the cover protects against solid objects larger than 12.5 mm (fingers, tools) and against dripping water when tilted up to 15° — adequate for a clean, dry indoor enclosure but not for washdown or outdoor exposure. The kit is an earthing accessory that integrates into the ATV 68 drive's protective earth circuit.