New Outdoor Ring Main Unit (Box): High-reliability Solution Tailored for Harsh Environments

To meet global power distribution needs in complex environments, our company successfully developed a new generation of outdoor ring main units (boxes) in early 2025, based on IEC and SEC standards. This series is specially reinforced for harsh regions with high temperatures and heat, featuring a 17.5kV voltage rating and flexible 3-way or 4-way configurations, providing a robust and highly adaptable core equipment for stable grid operation.

I.Product Positioning: Overcoming Challenges, Mission Accomplished

This outdoor ring main unit (box) is custom-designed for harsh environments where traditional power distribution equipment struggles to operate stably. It directly addresses severe challenges such as high temperatures, intense sunlight, high humidity, and strong winds/sand, ensuring continuous and reliable power supply under extreme conditions through innovative technical design and rigorous process standards. It is an ideal choice for expanding and consolidating grid endpoints.

II.Core Features and Technological Innovations

Special Voltage Rating and Flexible Configuration

1.The product adopts a 17.5kV voltage rating, filling market gaps in specific application scenarios.

2.Offers standard 3-way and 4-way unit configurations with excellent expandability and scheme adaptability, precisely meeting wiring modes and capacity needs of different regional grids.

Outstanding Environmental Adaptability

1.High-temperature and Heat-resistant Design: Key components and cabinet structure are optimized with high-temperature materials and special heat dissipation design, ensuring internal temperature rise remains within safe limits in continuous high-heat environments, safeguarding insulation performance and mechanical life.

2.High Protection Rating: The cabinet has excellent sealing performance with a high protection level, effectively preventing intrusion of dust, moisture, and salt fog, resisting outdoor rain, wind, and sand erosion.

Inherited and Enhanced Reliability Genes

1.Inherits the classic design philosophy of fully insulated, fully sealed, and maintenance-free ring main unit products, with all live parts sealed in the gas tank, unaffected by external environments.

2.Continues mature safety designs such as three-position load switch interlock and reliable pressure relief channels, ensuring operational safety and reliability.

Future-oriented Intelligent Interfaces

The product features pre-installed standardized interfaces for easy compatibility with DTU (Distribution Terminal Unit) and communication modules, enabling remote monitoring, fault diagnosis, and automated management, providing foundational support for building resilient smart distribution networks.

III.Typical Application Scenarios

Power distribution networks in desert and gobi regions with intense sunlight and perennial high temperatures.

Coastal areas with salt fog corrosion.

Plateau regions with large day-night temperature differences and strong ultraviolet radiation.

Outdoor distribution sites in industrial zones, mines, and other harsh environmental conditions.