Normal Operating and Installation Conditions

• Altitude: The altitude of the installation site shall not exceed 2000 m;
• Humidity: At a maximum temperature of +40℃, the relative humidity of the air shall not exceed 50%. Higher humidity is permissible at lower temperatures, such as 90% at 20℃. Measures should be taken to address occasional condensation due to temperature changes.
• Pollution Degree: 3;
• Installation Category: III;
• Installation: The inclination of the mounting surface from the vertical plane shall not exceed ±15 degrees;
• Shock and Vibration: The location shall be free from significant shock, vibration, and shaking;
• Transportation and Storage: -25℃ to +55℃, with a short-term (24h) limit to +70℃.
• Ambient Air Temperature: -5℃ to +40℃; and the average temperature over 24 hours shall not exceed +35℃.

Typical Applications of Low-Voltage AC Vacuum Contactors

• Heavy-Duty AC Motor Control: Engineered for the frequent starting, stopping, reversing, and jogging (inching) of three-phase AC induction motors. They provide highly reliable control for high-inertia industrial machinery, including heavy-duty pumps, ventilation fans, compressors, and conveyors under severe AC-3 and AC-4 duty cycles.
• Transformer Dynamic Switching: Essential for the safe, dependable, and frequent connection and disconnection of distribution transformers. Our vacuum contactors ensure transient-free, smooth switching and reliable isolation within low-voltage switchgear and power distribution units.
• Capacitor Bank Switching (PFC): Crucial for automatic Power Factor Correction (PFC) and reactive power compensation systems. Specially designed to suppress high inrush currents during multi-stage capacitor switching, thereby protecting the network and improving overall grid efficiency.
• Industrial Automation & Remote Operation: Functions as a core power switching component within Motor Control Centers (MCCs) and decentralized automation networks. They offer precision switching, extended electrical endurance, and seamless interface with PLCs and remote control systems.
• Hazardous & Explosion-Proof Environments: Highly optimized for integration into flameproof and explosion-proof magnetic starters. The fully enclosed, zero-open-arcing vacuum interruption technology ensures ultimate operational safety in severe, volatile, or hazardous environments such as underground mining, petrochemical plants, and grain handling facilities.

• Extended Service Life & High Switching Frequency: Leveraging advanced vacuum interruption technology, contact wear is drastically minimized, ensuring millions of trouble-free operations. This exceptional mechanical and electrical endurance significantly reduces maintenance intervals and costly downtime in high-frequency, heavy-duty cycling applications.
• Superior Safety & Advanced Arc Extinguishing: Electrical arcs are rapidly extinguished within the hermetically sealed vacuum interrupter, completely preventing external arc flashing. This guarantees ultimate protection for both personnel and downstream equipment, eliminating the hazards associated with open-air arcing.
• Rugged Reliability & Harsh Environment Adaptability: Engineered with a robust structural design, our contactors deliver stable, high-performance reliability. The vacuum-sealed construction provides an inherent barrier against ambient dust, high humidity, and corrosive chemical agents, ensuring seamless operation in severe industrial environments.
• Optimized Total Cost of Ownership (TCO): The synergy of a prolonged operational lifespan and virtually maintenance-free performance delivers a highly cost-effective switching solution. Our contactors optimize system efficiency, translating into substantial, long-term operational savings and maximum return on investment (ROI).

• As a premier, engineering-driven vacuum contactor manufacturer, Chennuo Electric brings unmatched technical expertise to the low-voltage power distribution sector. Our unique manufacturing capabilities and customer-first approach set us apart in the global market:
• Advanced & Certified Manufacturing: As a verified, direct-to-factory supplier, our professional engineering ensures that every low-voltage unit complies with rigorous international quality standards. We deliver heavy-duty reliability with specialized ratings of up to 2000V / 1250A for high-demand applications.
• Uncompromising Quality & Rugged Durability: Tailored for the most demanding low-voltage industrial environments, our contactors exhibit outstanding physical and electrical durability. Our rigorous quality control framework guarantees stable, high-performance execution even during continuous, high-frequency switching operations.
• Highly Flexible & Customized Engineering Solutions: We offer an extensive portfolio of low-voltage vacuum contactor configurations, spanning diverse rated voltages, current capacities, coil specifications, and pole configurations (e.g., 3-pole, 4-pole). Furthermore, our in-house R&D team provides tailormade OEM/ODM solutions to match your precise blueprints.
• Long-Term Partnership & Comprehensive Technical Support: We offer end-to-end client support that goes far beyond the transaction. From initial technical consultation and drawing verification to responsive after-sales service, Chennuo ensures seamless project execution and absolute peace of mind.