The LY series intelligent dehumidification device employs semiconductor refrigeration technology to proactively draw humid air from enclosed spaces into the dehumidification duct via a fan. As the air passes through the semiconductor refrigeration unit, water vapor condenses into liquid water, which is then discharged outside the cabinet through a drainage tube, achieving superior dehumidification performance. By reducing the moisture content in the air, this system simultaneously lowers both relative and absolute humidity levels while minimally increasing temperature—eliminating adverse effects caused by temperature differentials. This approach fundamentally prevents or reduces accident risks while avoiding accelerated aging of internal components and cabinet structures due to elevated temperatures.
Unlike passive anti-condensation methods, the intelligent dehumidification system actively manages condensation formation, effectively mitigating safety hazards such as equipment degradation, reduced insulation resistance, secondary terminal breakdown, material mildew, and corrosion of steel structural components, thereby ensuring safe operation of power grids.
Condensation-induced creepage and flashover accidents within electrical equipment typically occur under the following conditions:
- High ambient humidity with significant temperature fluctuations: Switchgear cabinets located in humid regions may accumulate moisture at their base, with some cable trenches even containing standing water.
- Underground installations: Switchgear housed in basements experiences elevated humidity levels, where cabinet temperatures—particularly near the floor—drop below ambient conditions.
- Equipment standby modes: When electrical cabinets are temporarily deactivated, their internal microenvironment becomes cooler than surrounding areas, promoting surface condensation. Under such circumstances, re-energization can trigger immediate operational failures.
To ensure safe power grid operation and prolong the service life of electrical equipment, the power system now mandates stricter requirements for moisture prevention and anti-condensation measures within cabinets.