ABB Power Distribution Equipment Helps Shenzhen Mawan Tunnel Achieve “Zero Power Outage” Operation

A Landmark Tunnel with Unique Power Challenges Mawan Subsea Tunnel, Shenzhen’s first cross-sea tunnel, opened on January 21, 2025. Its two subsea shield tunnels have a maximum diameter of 15.5 meters—setting a new domestic record. The 1.1-kilometer underwater section also makes power supply far more difficult. High chloride levels in subsea environments corrode metal equipment nonstop. Poor air flow inside…