CKJ5-630/1140 Mining Explosion-Proof AC Vacuum Contactor – 1140V 630A High-Capacity Magnetic Switch for Coal Mine Machinery
The CKJ5-630/1140 Series AC Vacuum Contactor is a heavy-duty electrical component specifically designed for underground coal mining and hazardous industrial environments. Operating at AC 50Hz with a rated voltage of 1140V and a high current capacity of 630A, it excels in the long-distance connecting and breaking of power circuits. This contactor is an ideal core component for assembling explosion-proof electromagnetic starters, providing reliable control and protection for mining machinery, AC motors, and electronic systems in high-dust and gas-risk areas.
CKJ5-630/1140 Mining Explosion-Proof AC Vacuum Contactor (630A)
Product Overview
The CKJ5-630/1140 Series is a heavy-duty, explosion-proof AC vacuum contactor specifically engineered for the rigorous safety standards of underground coal mines and hazardous industrial environments. Operating at AC 50Hz with a rated voltage of 1140V and a high current capacity of 630A, it excels in the long-distance connecting and breaking of power circuits. It is an ideal core component for assembling explosion-proof electromagnetic starters, providing reliable control for mining machinery, AC motors, and power distribution systems in areas at risk of explosive gas or dust.
Core Features & Material Advantages
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Flame-Retardant & Anti-Static Shell: The exterior is constructed from high-grade flame-retardant and anti-static materials, offering excellent sealing and durability for harsh conditions.
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Ceramic Vacuum Structure: The vacuum switch tube features a robust ceramic structure, ensuring stable arc extinguishing and a long operational service life.
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Deep-Threaded Terminals: Utilizes stainless steel material with deep-thread processing for solid connections and high resistance to corrosion.
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Compact & Easy Installation: Its small size and light weight make it easy to install within various electrical control panels and explosion-proof enclosures.
Technical Specifications
| Item | Specification |
| Rated Working Voltage | 1140V |
| Rated Working Current | 630A / 600A |
| Rated Control Circuit Voltage | 220V AC |
| Auxiliary Contacts | 3NO (Normally Open) + 3NC (Normally Closed) |
| Opening Distance | 2.1 ± 0.1 mm |
| Overtravel | 1.1 ± 0.1 mm |
| Initial / End Pressure | 19 ± 1.5 kg / 20 ± 1.5 kg |
Typical Usage Scenarios
The CKJ5 series is highly versatile and certified for use in diverse flammable and explosive environments, including:
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Underground Coal Mines & Processing Plants
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Explosion-Proof Mining Vehicles (Diesel/Motor Trucks)
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Heavy Machinery: Digging machines and oil pump rooms
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Hazardous Zones: Suitable for Zone 1, Zone 2, and IA, IIB, IC class explosive gas environments
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