The VW3A98LBPC1 is a connection kit from the Altivar Process Modular range, designed to mechanically and electrically bridge two side-by-side power modules into a single drive architecture. The kit composition is listed as 3 bar with holes — this is the busbar set that carries the DC bus and power connections between the modules, sized for the modular frame.
This kit is specific to the Altivar Process Modular platform — it is not a universal busbar. The 3-bar set with holes mates to the power module's DC bus terminals and the motor protection module's input side. In a panel build, the kit occupies the space between the two modules; no additional drilling or busbar fabrication is needed. The accessory category is Connection accessories, and the device application is explicitly to connect 2 side by side power modules. If you are building a multi-module drive system, this is the correct mechanical interconnect.