How should the strong and weak current wiring of an intelligent low-voltage monitoring unit be isolated?

High-voltage and low-voltage isolation cabling employs zoning, layering, and shielding.

PCB Zoning: The distance between high-voltage and low-voltage zones is greater than 15mm, with a 3mm groove in between filled with insulating material.

Cabling Layering: High-voltage cables run on the top and bottom layers, while low-voltage cables run on the inner layers.

Cable Isolation: High-voltage and low-voltage cables are routed separately in cable trays with a spacing greater than 100mm.

Shielding Measures: Shielded twisted-pair cables are used for low-voltage signal lines.

This isolation cabling reduces coupling interference by more than 35dB, meeting the EMC requirements of IEC 61800-3 for industrial environments.