CH6A-40.5-550 Medium Voltage Contact Box: Technical Overview The CH6A-40.5-550 Medium Voltage Contact Box is a robust and reliable component designed for medium-voltage (MV) switchgear and electrical distribution systems. Rated for 40.5 kV and a continuous current capacity of 550 A, it serves as a critical interface for connecting, isolating, and testing circuits in substations, industrial plants, and utility networks. Key Features 1. Voltage and Current Ratings - Rated Voltage: 40.5 kV (suitable for systems up to 36 kV operational voltage). - Rated Current: 550 A, ensuring efficient power transmission with minimal losses. - Short-Circuit Withstand: Complies with IEC 62271 standards, typically supporting short-circuit currents up to 25 kA/3s. 2. Compact and Modular Design - The contact box features a compact, modular construction, enabling easy integration into switchgear panels such as circuit breakers, disconnectors, or busbar compartments. - Its design ensures space optimization while maintaining high dielectric strength and mechanical stability. 3. Safety and Reliability - Equipped with spring-loaded, self-aligning contacts to ensure low contact resistance and reliable connections under load. - Arc-resistant materials and insulation barriers minimize the risk of internal arcing, enhancing operational safety. - IP2X or higher protection prevents accidental contact with live parts. 4. Installation and Maintenance - Tool-free or minimal-tool assembly simplifies installation and reduces downtime. - Contacts are accessible for inspection, cleaning, or replacement without disassembling the entire unit. - Compatible with standard busbar systems, facilitating retrofitting in existing switchgear. 5. Environmental and Standards Compliance - Suitable for indoor/outdoor use with corrosion-resistant coatings (e.g., galvanized or stainless steel). - Meets IEC 62271, IEEE C37.20, and other regional standards for MV equipment. - Operates reliably in temperatures from -25°C to +55°C and humidity up to 95%. Applications - Primary and secondary substations for power distribution. - Industrial plants (mining, oil & gas, manufacturing) requiring durable MV connections. - Renewable energy systems, such as wind or solar farms, where stable MV switching is critical. Conclusion The CH6A-40.5-550 Medium Voltage Contact Box combines high performance, safety, and adaptability for modern electrical infrastructure. Its robust construction, compliance with international standards, and ease of maintenance make it a preferred choice for engineers prioritizing reliability in medium-voltage applications. (Word count: 500)