Fully Insulated and Sealed Design: The enclosure is constructed from 2mm-thick stainless steel, achieving an IP65/IP67 protection rating. It withstands flood immersion, high dust levels, and extreme temperatures ranging from -30°C to 50°C, enabling maintenance-free operation.
Core Component Technology: Busbar connection panels utilize a fully insulated, sealed structure with current ratings ranging from 200A to 630A. Cable connectors include plug-in types (elbow and T-types) and bolted types; American-style boxes use screw-in bolted connections for the 600A main circuit, while European-style boxes typically employ 630A bolted connectors.
Safety Interlock Technology: Models equipped with switches feature SF6 load-break switches and "five-prevention" interlock mechanisms to facilitate fault isolation and network reconfiguration, ensuring a safe operational lifespan of over 20 years under normal conditions.
Technical Characteristics of Mainstream Types
American-Style Branch Box: Complies with IEEE 386 standards; features single-sided door access and horizontal multi-way busbars. The 200A branch connectors support live plug-in/plug-out operations, offering flexible configurations with up to 8 incoming/outgoing circuits.
European-Style Branch Box: Complies with DIN 47636 standards; features double-sided door access and busbar connections via wall-through bushings. Cable layout is organized, eliminating the need for wide-span crossovers of three-core cables, and the unit offers excellent resistance to condensation and pollution.
Ring-Main Type Branch Box: Integrates SF6 load-break switches with optional two-position or three-position configurations. It enables ring-main power supply, minimizes the scope of fault-related outages, and meets the requirements for distribution network automation upgrades.