According to the new regulations, exposed outdoor low-voltage power supply equipment must possess four mandatory protective capabilities: protection against rainwater intrusion, internal condensation, corrosion resistance, and external damage. The use of simple waterproof enclosures made of recycled materials with thin walls and lacking pressure relief and dehumidification structures is strictly prohibited. Previously, the industry commonly held the misconception of prioritizing power supply units over enclosure protection. Low-priced enclosures on the market relied solely on a single layer of rubber seals, only capable of withstanding short periods of light rain. During the flood season, with continuous heavy rains and temperature differences exceeding 15°C between day and night, internal and external pressure imbalances easily occurred. Rainwater flowed back through cable gaps, and condensation formed inside the enclosure, corroding the power circuit board. This could lead to power outages and blackouts, or even short circuits, electrical leaks, and electric shocks, directly constituting a major electrical safety hazard.
Addressing the characteristics of the flood season climate and new regulatory standards, this Outdoor Power Supply Sealed Box features a specially designed structure, directly addressing three high-frequency safety hazards during the flood season. First, it features an upgraded triple-closed-loop waterproof structure. An integrated flanged drainage channel along the enclosure edge blocks rainwater from sloping surfaces, and high/low temperature resistant EPDM sealing strips prevent softening at high temperatures and hardening at low temperatures, maintaining an IP67 protection rating for the entire unit, resisting short-term immersion in water and strong winds and rain. Secondly, it comes standard with a miniature waterproof pressure relief and ventilation valve, meeting the new regulations' internal dehumidification requirements. It balances internal and external air pressure while remaining waterproof and dust-free, allowing for the continuous removal of residual heat and moisture from the power supply, preventing condensation and water accumulation during the rainy season and flood season, eliminating the need for manual dehumidification. Thirdly, the entire enclosure undergoes anti-aging and salt spray reinforcement treatment. The PC flame-retardant version has passed summer high-temperature exposure aging tests, while the aluminum alloy version is resistant to both coastal typhoons and salt spray corrosion, meeting the new regulations' 5-year long-term outdoor protection verification requirements.
Based on the practical needs of grassroots operation and maintenance rectification, the product has been optimized for compliance details. All exposed fasteners on the enclosure are made of 304 stainless steel, preventing screws from rusting and jamming in high humidity environments during the flood season, and avoiding damage to the sealing structure from unauthorized and violent disassembly. A standardized waterproof cable entry port is provided, eliminating the need for secondary drilling on-site that could compromise protective performance, complying with power on-site construction compliance standards. The system offers two distinct application versions: a lightweight PC version suitable for urban and park streetlights, street surveillance, and parking lot security points, offering excellent insulation without requiring additional grounding; and a die-cast aluminum alloy reinforced version designed for coastal embankments and mountainous outdoor base stations, resistant to strong winds and rock impacts, suitable for unattended outdoor locations.
Multiple low-voltage electrical maintenance units have reported that during this round of pre-flood season rectification, replacing the enclosures with compliant sealed boxes reduced the outdoor power supply failure rate by 91%, and all units successfully passed the electrical hazard pre-inspection. Compared to the 1-2 year replacement cycle of traditional enclosures, the new enclosure has an outdoor lifespan of up to 8 years, aligning with current policies promoting energy conservation, emission reduction, and long-term maintenance of power facilities, avoiding resource waste caused by repeated rectifications.
Industry electrical compliance personnel advise that with only about 20 days left before the new regulations take effect, a comprehensive inspection and replacement of existing old and simple power supply enclosures is necessary. Currently, this outdoor power supply sealed box is available for emergency flood season stockpiling, supporting rapid delivery for municipal emergency rectification and sporadic replacements in industrial parks, meeting the electrical safety renovation needs of various regions across the country during the flood season.
