CKJ20 Series 1140V AC Low-Voltage Vacuum Contactor – 630A/800A/1000A for Motor, Transformer, and Capacitor Control
The CKJ20 Series AC Low-Voltage Vacuum Contactor is a high-reliability solution designed for power network systems with AC 50-60Hz and a rated voltage up to 1140V (with an upper limit of 1.6kV). Specifically engineered for 630A and 800A applications, it is the ideal choice for long-distance circuit management and the frequent starting and control of AC motors, transformers, and capacitor banks. Featuring stable performance, excellent compatibility, and a maintenance-free contact system, this series serves as an ideal modern substitute for traditional, old-fashioned vacuum contactor switches.
CKJ20 Series 1140V AC Low-Voltage Vacuum Contactor (630A / 800A / 1000A)
Product Overview
The CKJ20 series vacuum contactor is a high-performance electrical switching component designed for power network systems with AC 50-60Hz. It is engineered for main circuits with a rated voltage of up to 1140V (with an upper limit capacity of 1.6kV). This series is primarily utilized for the long-distance making and breaking of circuits and is ideal for the frequent starting and control of AC motors, transformers, and capacitor banks.
Core Advantages
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Maintenance-Free Operation: Utilizing vacuum technology for arc extinguishing, the contact system requires no maintenance throughout its long service life.
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High Reliability: Offers stable performance and excellent compatibility, making it the ideal modern substitute for old-fashioned traditional vacuum contactor switches.
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Enhanced Safety: The vacuum-sealed contacts ensure no exposed arcs, providing a safer environment for high-frequency industrial operations.
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Modular Design: Features a robust housing with high-quality auxiliary contact blocks for expanded control capabilities.
Technical Specifications
| Item | Unit | CKJ20-630 | CKJ20-800 |
| Main Circuit Rated Voltage | V | 1140 | 1140 |
| Main Circuit Rated Current | A | 630 | 800 |
| Making Capacity (A/100 times) | A | 6000 | 6000 |
| Breaking Capacity (A/10 times) | A | 4800 | 5000 |
| Limit Breaking Capacity (A/3 times) | A | 6000 | 6000 |
| Mechanical Life (10,000 times) | Times | 300 | 300 |
| Electrical Life AC3 (10,000 times) | Times | 60 | 60 |
| Contact Open Distance | mm | 2.5 ± 0.3 | 2.5 ± 0.3 |
| Overtravel | mm | ≥ 1 | ≥ 1 |
Standard Working & Installation Conditions
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Ambient Temperature: Reliable operation within a range of -5°C to +40°C, with a 24-hour average not exceeding +35°C.
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Altitude: The installation site altitude should not exceed 2000 meters.
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Installation Requirements: Designed for use in stable environments without significant shaking, shock, or vibration to ensure optimal performance of the vacuum interrupters.
Typical Applications
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Large-scale AC Motor Starting and Control
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Industrial Transformer Protection and Switching
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Power Factor Correction through Capacitor Bank Control
Selection details for CKJ20 Series 1140V AC Low-Voltage Vacuum Contactor
To confirm the required vacuum contactor configuration for your project, include:
- Operating voltage, rated current, pole arrangement and load type
- Coil/control voltage, switching duty and required operating frequency
- Mounting dimensions, wiring diagram and protection coordination
Drawings and quotation requirements
Send the model reference, application, quantity and destination country together with the relevant drawing or existing equipment information. Confirm the selected configuration against a model-specific drawing and ratings sheet before ordering; request the applicable test documentation for your project requirements.
Request model confirmation and a technical quotation · Compare related Vacuum Contactor / Low Voltage Vacuum Contactor.
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