CKJ5 Series 1140V Vertical Vacuum Contactor – High Current 1000A/1250A/1600A for Explosion-Proof Magnetic Starters
The CKJ5 Series Vertical Vacuum Contactor is a high-performance solution designed for AC 50Hz power systems with a rated voltage of up to 1140V. Specifically engineered for high-current applications of 1000A, 1250A, and 1600A, it excels in long-distance circuit management and the frequent starting and control of heavy-duty AC motors. Its robust vertical design and excellent compatibility make it the ideal core component for assembling various explosion-proof vacuum electromagnetic starters. Featuring maintenance-free operation and a long service life, this series serves as the perfect modern substitute for traditional, older-model contactors.
CKJ5 Series 1140V Vertical Vacuum Contactor (1000A / 1250A / 1600A)
Product Overview
The CKJ5 series vertical vacuum contactor is a high-capacity power control unit designed for AC 50Hz systems with a rated voltage of up to 1140V. Engineered for heavy-duty industrial environments, it supports power circuits with rated currents of 1000A, 1250A, and 1600A. This series is the primary choice for long-distance circuit connection/disconnection and frequent starting and control of high-power AC motors.
Core Advantages
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Explosion-Proof Compatibility: Its superior design makes it ideal for assembly into various types of explosion-proof vacuum electromagnetic starters, particularly for mining and hazardous industrial sectors.
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Maintenance-Free & Durable: Utilizing vacuum as the arc-extinguishing medium, the contact system is virtually maintenance-free and offers an exceptionally long service life.
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Superior Conductivity: Equipped with thickened, high-quality copper busbars to ensure maximum electrical conductivity and efficient heat dissipation during high-current operation.
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Reliable Performance: Offers stable operation and good compatibility, serving as a modern, high-reliability substitute for old-fashioned contactor models.
Technical Specifications
| Item | Unit | Data (1000A / 1250A / 1600A) |
| Main Circuit Rated Voltage | kV | 1.14 |
| Main Circuit Making Capacity | A/100 times | 6000 |
| Main Circuit Breaking Capacity | A/10 times | 4800 / 5000 / 5000 |
| Mechanical Life Time | Times | 1,000,000 |
| Electrical Life (AC3) | Times | 200,000 |
| Electrical Life (AC4) | Times | 20,000 |
| Contact Opening | mm | 3 ± 0.5 |
| Over Travel | mm | ≥ 1.3 |
Normal Working & Installation Conditions
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Ambient Temperature: Surrounding air should remain between -5°C and +40°C, with a 24-hour average not exceeding +35°C.
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Altitude: The installation site altitude should not exceed 2000m.
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Humidity: Relative humidity should not exceed 50% at +40°C; higher humidity is permitted at lower temperatures (e.g., 90% monthly average).
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Installation Angle: The mounting surface and vertical inclination should not exceed 15°.
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Pollution Level: Rated as Class 3.
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Stability: Should be used in environments without significant shaking, shock, or vibration.
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