How should the shielding of the PCS cable inlet be designed for an energy storage system?

The cable entry point of a PCS cabinet is a weak point in shielding and must be specially designed to prevent EMI leakage. The design principle is to maintain shielding continuity. Specific methods include:

1. Using shielded connectors: For each incoming and outgoing cable, use shielded connectors (such as D-Sub or RJ45 with metal shells) whenever possible, and overlap the metal shell with the cabinet panel 360 degrees.

2. Centralized processing and filter boards: For multiple cables, filter boards or shielded busbars can be used. Cables enter through the filter connectors on the board, which is tightly installed against the cabinet wall. The filter circuit provides signal/power filtering while also ensuring shielding continuity.

3. Shielded cable glands: For power or ordinary signal cables, metal shielded cable glands can be used. The cable shield expands inside the gland and contacts the inner wall of the gland. The gland itself is threaded and fastened to the cabinet opening, achieving a transition from the shielding layer to the cabinet.

4. Grounding at the nearest available point: All cable shielding layers are connected to the cabinet's grounding bar at the entry point using the methods described above.