0102030405
Ckj20-630,800/2000a AC Vacuum Contactor
2025-08-06
The Ckj20 Series AC vacuum contaCtors—available in 630A, 800A, and 2000A ratings—are high-performance electrical switching devices designed for reliable control of AC power circuits in industrial and commercial applications. Leveraging vacuum arc-extinction technology, these contactors deliver safe, efficient operation even in demanding environments.
Core Design & Construction
Built with durability in mind, the Ckj20 contactors feature a robust metal enclosure and vacuum interruPters housed in ceramic or glass envelopes, ensuring long-term vacuum integrity (≤10⁻⁴ Pa). Key design elements include:
- Modular structure for easy installation and maintenance, compatible with standard switchgear panels.
- Magnetic operating mechanism with low power consumption, supporting AC/DC control voltages (110V, 220V, 380V).
- Arc-resistant design to contain and extinguish arcs quickly, reducing risk of damage to surrounding components.
Performance & Switching Capability
- Rated Parameters: 630A, 800A, and 2000A current ratings; suitable for 50/60Hz AC circuits up to 1140V.
- Vacuum Arc Quenching: Enables silent, spark-free switching, with breaking time ≤50ms to minimize electrical disturbances.
- Mechanical & Electrical Life: Mechanical life exceeds 1 million operations; electrical life reaches 100,000+ cycles at rated current, ensuring long-term reliability.
Safety & Operational Features
- Overload Protection: Optional thermal overload relays for added circuit safety (compatible with common protection systems).
- Interlock Compatibility: Designed to work with auxiliary contacts and interlock devices, preventing misoperation in complex control systems.
- Environmental Resistance: Operates reliably in temperatures ranging from -25°C to +40°C, with resistance to dust, moisture, and vibration (IP20 protection rating).
Application Scope
Ideal for controlling high-current AC circuits in:
- Industrial machinery (motors, pumps, compressors) in manufacturing plants.
- Power distribution systems in commercial buildings, data centers, and logistics facilities.
- Renewable energy setups (solar inverters, wind turbine controllers) requiring frequent switching.
- Mining, oil, and gas industries, where rugged performance is critical.
Key Advantages
- Energy Efficiency: Low control power consumption reduces operational costs compared to traditional contactors.
- Low Maintenance: Vacuum technology eliminates the need for arc-extinguishing media (oil, gas), minimizing upkeep.
- Space-Saving: Compact design fits into tight switchgear configurations, optimizing panel space.
- Safety Compliance: Meets IEC 62271-103 and GB 14808 standards, ensuring adherence to global safety norms.