Core Viewpoint - The article highlights the efforts of State Grid Shiyan Dongfeng Power Supply Company in enhancing the safety and reliability of the heating system's power supply through the installation of intelligent explosion-proof boxes in underground cable corridors. Group 1: Safety Measures - The oxygen level in the cable corridor must be maintained between 19.5% and 23.5% to ensure safe operations, with ventilation being the first step in ensuring safety [1] - The company has conducted a comprehensive inspection of 112 kilometers of cable corridors in the main urban area since mid-October, installing 116 advanced safety devices including intelligent explosion-proof boxes and explosion-proof blankets [1] Group 2: Technological Innovations - The intelligent explosion-proof box, approximately 1 meter long, functions like a cast for the "joints" of the cables, featuring built-in monitoring terminals that can transmit real-time data on cable location, temperature, and water immersion for remote monitoring [1] - Each explosion-proof box weighs 30 kilograms, and the installation process is physically demanding, akin to a 30-minute weight training session [3] Group 3: Operational Efficiency - The system provides immediate alerts in case of anomalies, allowing for rapid power source switching for critical supply cables, thereby ensuring uninterrupted heating power and improving fault handling efficiency [3]