The coastal area of Qinhuangdao has a typical humid climate

with high moisture levels and concentrated rainfall in summer. In a 10 kV distribution room

defects in cable trench sealing

insufficient ventilation

and poor drainage cause severe water accumulation and moisture buildup. These problems result in equipment corrosion

reduced cable insulation performance

and frequent faults. This paper analyzes the causes and hazards of moisture accumulation in cable trenches and proposes a comprehensive treatment scheme integrating drainage

ventilation

and intelligent control. The application results show that the temperature and humidity in the cable trench are controlled within reasonable ranges

and the moisture problem is effectively solved. This study provides a practical reference for moisture proofing and dehumidification treatment of cable trenches in similar distribution rooms in coastal areas.