CKJ5 Series 1140V Vertical AC Vacuum Contactor – High Current 800A/1000A/1250A for Heavy-Duty Motor and Transformer Control
The CKJ5 Vertical Series Vacuum Contactor is a high-capacity power control solution designed for AC 50-60Hz networks with a rated voltage up to 1140V (system capacity up to 1.6kV). Engineered for high-current applications from 800A to 1250A, this vertical-type contactor is ideal for long-distance circuit management and the frequent starting and control of AC motors, transformers, and capacitor banks. Featuring maintenance-free vacuum technology and a robust mechanical structure, it offers a mechanical life of up to 1,000,000 cycles, making it the perfect modern substitute for traditional, older-model vacuum switches.
CKJ20 & CKJ5 Series 1140V Vertical AC Vacuum Contactor (630A – 1250A)
Product Overview
The CKJ20 and CKJ5 Vertical Series are high-capacity AC vacuum contactors engineered for heavy-duty industrial power networks. Designed for systems with AC 50-60Hz and a rated voltage up to 1140V (with a maximum capacity of 1.6kV), these contactors excel in high-current environments ranging from 630A to 1250A. They are primarily utilized for remote circuit making and breaking, as well as the frequent starting and control of AC motors, transformers, and capacitor banks.
Core Advantages
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Maintenance-Free Durability: Utilizing vacuum arc-extinguishing technology ensures the contact system remains maintenance-free throughout its long service life.
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High Reliability & Compatibility: Offers stable and reliable performance with excellent compatibility, serving as an ideal modern substitute for old-fashioned vacuum switches.
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Robust Vertical Design: Featuring a specialized vertical structure with high-quality copper busbars for superior conductivity and heat management.
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Exceptional Mechanical Life: Rated for up to 1,000,000 mechanical operations, ensuring long-term operational stability in high-frequency switching applications.
Technical Specifications
| Item | Unit | CKJ20-630 | CKJ20-800 | CKJ5-1000/1250 |
| Rated Main Loop Voltage | V | 1140 | 1140 | 1140 |
| Rated Main Loop Current | A | 630 | 800 | 1000 / 1250 |
| Mechanical Life | 万次 (10k) | 300 | 1140 | 100 |
| Making Capacity | A/100 times | 6000 | 6000 | 6000 |
| Breaking Capacity | A/10 times | 4800 | 5000 | 5000 |
| Clearance (Open) | mm | 2.5 ± 0.3 | 2.5 ± 0.3 | 3 ± 0.5 |
| Over Travel | mm | ≥ 1 | ≥ 1 | ≥ 1.3 |
Normal Working & Installation Conditions
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Ambient Temperature: Reliable operation within -5°C to +40°C, with a 24-hour average not exceeding +35°C.
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Altitude: Installation site altitude should not exceed 2000 meters.
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Humidity Control: Relative humidity should not exceed 50% at +40°C; higher humidity (up to 90% monthly average) is permissible at lower temperatures.
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Pollution & Installation: Rated as Pollution Level Class 3 and Installation Category Class III.
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Stability: Must be installed on surfaces with a vertical inclination of no more than 15° and in areas free from significant shaking or vibration.
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