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JCZ5 Series Indoor AC High Voltage Vacuum Contactor
The JCZ5 Series Indoor AC High Voltage Vacuum Contactor is engineered for 3-phase AC 50Hz power systems up to 12 kV and 630 A, offering precise switching, high breaking performance, and exceptional endurance for frequent-operation applications. Designed for industrial distribution networks and MV control systems, it delivers stable performance, long lifecycle, and high mechanical reliability.
Core Product Positioning
The JCZ5 series is specially developed for indoor medium-voltage equipment requiring
• frequent switching,
• reliable breaking capacity, and
• long maintenance-free operation.
It ensures safe and efficient control of power equipment within 12 kV / ≤630 A systems, supporting continuous and high-frequency operation in modern electrical networks.
Performance Highlights
1. Wide Voltage & Current Compatibility
Rated voltage options: 7.2 kV / 12 kV
Rated current options: 200 A / 400 A / 630 A
This wide adaptability suits diverse MV load conditions in utility, industrial, and mining environments.
2. Strong Switching & Breaking Capability
Rated making current (rms): up to 6300 A
Rated breaking current: up to 5040 A
The vacuum arc-extinguishing chamber ensures rapid dielectric recovery and stable operation under large-current switching scenarios.
3. Flexible Electrical Control
Supports standard control voltages: AC110V / AC220V
Coil parameters are precisely matched to ensure a stable, fast response:
Closing coil inrush current examples: DC6/6.3A, DC10/5A
Holding coil and opening coil tailored for low energy consumption and high control accuracy
Ensures reliable control logic for automated MV systems.
4. Outstanding Operation Frequency & Long Service Life
Mechanical endurance: 3,000,000 operations (30×10⁴ cycles)
Electrical endurance:
AC-3 duty: 250,000 operations (25×10⁴ cycles)
AC-4 duty: 50,000 operations (5×10⁴ cycles)
Rated operation frequency: up to 300 operations/hour
Perfect for equipment requiring frequent start/stop, such as motors, transformers, capacitors, and switching devices.
Application Scope
Ideal for any indoor power system ≤12 kV and ≤630 A, including:
Medium-voltage motor control
Vacuum switchgear and contactor-fuse combinations
Industrial distribution panels
Mining and chemical facilities
Capacitor bank switching
Transformer control systems
RMU auxiliary control circuits
Performs exceptionally in frequent switching and precision control environments.
Technical Advantages (Performance)
Vacuum Arc-Extinguishing Excellence
Fast dielectric recovery
Efficient high-current breaking
Stable performance under frequent operations
Explosion-Free & Safe
Sealed vacuum interrupter
No explosion risk
Suitable for hazardous industries (mining, chemical, petroleum)
High Mechanical Durability
Millions of mechanical cycles
Reliable for long-term heavy-duty operation
Material & Structural Advantages
High-Quality Copper Coils
Pure copper winding ensures long coil life
Optional permanent-magnet holding or energy-saving coil designs
Low holding power & reduced heat generation → lower operating cost
Superior Conductivity
Low-resistance conductive path
High electrical efficiency
Minimizes thermal rise & improves stability
Professional Structural Design
Optimized internal layout
Stable contact pressure
Enhanced vibration and temperature resistance
Key Parameter Highlights
Rated Voltage: 12 kV
Rated Current: 630 A Max
Rated Frequency: 50 Hz
Rated Operation Frequency: 300 operations/hour
Mechanical Life: 30×10⁴ cycles
Applicable Temperature: –25°C ~ +40°C
Rated Making Current: 6300 A
Rated Breaking Current: 5040 A
Why Choose the JCZ5 Series Vacuum Contactor?
✓ Wide voltage/current adaptability
✓ Strong making & breaking capabilities
✓ Vacuum chamber with rapid arc-extinguishing
✓ Explosion-free, sealed, safe for hazardous zones
✓ High electrical and mechanical endurance
✓ Low-energy copper coil design
✓ Precision control at AC110/220V
✓ Proven reliability in 7.2 kV / 12 kV MV systems
