SINAMICS V20 Size E shield connection kit Shield connecting kit SINAMICS shield connecting kit for SINAMICS V20. The shield connecting kit is available as option for every frame size. This allows the shielding to be simply and efficiently connected, which is required so that inverters can be installed in compliance with electromagnetic compatibility regulations (EMC). The shield connecting kit is available for frame sizes FSA to FSE as well as FSAA/FSAB. Clamps are required if the shield plate is attached to an inverter installed in an electrical cabinet. To mount the shielding plate at the SINAMICS V20 inverter for applications with "push through technology", the two M5 screws and nuts (tightening torque: 2.5 Nm ± 10 %) are required instead of the two M4 screws.