ZN85 40.5kV High Voltage Vacuum Circuit Breaker – Technical Overview The ZN85 40.5kV High Voltage Vacuum Circuit Breaker is a robust and reliable switching device designed for medium-voltage power distribution systems. It is widely used in substations, industrial plants, and renewable energy installations to protect electrical networks from overloads, short circuits, and other fault conditions. With a rated voltage of 40.5kV, this breaker combines advanced vacuum interrupter technology with a durable mechanical design to ensure high performance and long service life. Key Features 1. Vacuum Interruption Technology The breaker employs a vacuum interrupter as the arc-quenching medium, which offers superior dielectric strength and rapid arc extinction. The vacuum ensures minimal contact erosion, reducing maintenance needs and enhancing operational reliability. 2. Rated Parameters - Rated Voltage: 40.5kV - Rated Current: Up to 2500A (depending on configuration) - Short-Circuit Breaking Capacity: Typically 25kA or 31.5kA - Mechanical Endurance: Over 10,000 operations 3. Compact and Modular Design The ZN85 features a compact, spring-operated mechanism that allows for easy installation in switchgear panels. Its modular construction simplifies maintenance and replacement of components. 4. High Mechanical and Electrical Durability The breaker is built to withstand harsh environmental conditions, including temperature extremes and high humidity. The contacts are made of high-quality copper-chromium alloys, ensuring low contact resistance and high breaking capacity. 5. Safe and Flexible Operation - Equipped with manual and motorized spring-charging mechanisms for remote or local operation. - Integrated safety interlocks prevent unauthorized or incorrect operation. - Supports both fixed and withdrawable configurations for versatile applications. 6. Environmental Benefits Unlike SF6 breakers, the ZN85 uses vacuum technology, eliminating greenhouse gas emissions and aligning with eco-friendly power distribution practices. Applications The ZN85 40.5kV circuit breaker is ideal for: - Power Substations – Protects transformers and feeders. - Industrial Facilities – Ensures stable power supply for heavy machinery. - Renewable Energy Systems – Safeguards solar/wind farm connections to the grid. Conclusion With its high breaking capacity, low maintenance, and environmentally friendly design, the ZN85 40.5kV Vacuum Circuit Breaker is a dependable solution for modern medium-voltage power systems. Its advanced technology ensures secure and efficient power distribution while minimizing downtime and operational costs.