How to seal the shielding at the inlet of a power FTU cable?

Cable entry shielding is sealed to prevent electromagnetic leakage. Shielded and filtered connectors are used, such as the D-sub series with filtering, or shielded connectors with ferrite cores. During installation, the connector's metal housing contacts the housing 360°, using conductive gaskets to ensure continuity. The cable shielding layer is connected to the connector shielding housing by crimping or soldering. For unshielded cables, shielding sleeves are used, with both ends grounded. The entry point is filled with a conductive rubber plug, with an opening size less than λ/20. Through sealing, the cable entry shielding effectiveness is greater than 30dB@1GHz, meeting IEC 61000-5-7 requirements.