How should the shield of an EPS power cable be grounded?

Grounding the shielding layer of EPS power cables (such as input/output AC lines and DC battery lines) is crucial for suppressing radiated and conducted interference. A double-ended grounding method should be used, meaning the shielding layer should be reliably grounded at both the EPS cabinet outlet and the load (or battery) end. This provides a low-impedance metallic return path for high-frequency common-mode noise currents in the cable, allowing the noise current to flow back to the source through the shielding layer, rather than through spatial radiation or forming an uncontrollable loop through the ground.

Key points for grounding implementation:

1. 360-degree overlap: Use shielded cable connectors (such as metal EMC connectors) or metal clamps to ensure a 360-degree full-circumference contact between the shielding layer and the grounding terminal. "Pigtail" single-point connections are strictly prohibited.

2. Low-impedance grounding: The grounding terminal should be connected to the low-impedance grounding busbar of the EPS cabinet or directly to the cabinet housing.

3. Maintain continuity: The shielding layer must maintain electrical continuity at any joint or transition point in the cable.