CKG3-12 Series 12kV 3-Pole High Voltage AC Vacuum Contactor – 160A-630A Magnetic Switch for Industrial Motor Control & Circuit Protection
The CKG3-12 Series 3-Pole Vacuum Contactor is a high-performance solution designed for 12kV power networks operating at AC 50Hz-60Hz. Engineered for frequent starting and remote control of AC motors, this unit features an exceptional mechanical life of up to 1,000,000 operations. It is highly recommended for use in combination with fuses and protective devices to replace traditional vacuum circuit breakers, providing a more efficient and low-maintenance alternative for mining, metallurgy, and industrial power distribution systems.
CKG3-12 Series 12kV 3-Pole High Voltage AC Vacuum Contactor (160A – 630A)
Product Overview
The CKG3-12 Series is a premium indoor high-voltage AC vacuum contactor engineered for 12kV and 7.2kV power networks operating at AC 50Hz-60Hz. Designed for the remote making and breaking of circuits, this contactor is specifically optimized for the frequent starting and control of AC motors. It serves as a highly efficient and reliable alternative to traditional vacuum circuit breakers, especially when used in combination with high-voltage fuses and specialized protection devices.
Core Features & Benefits
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Exceptional Operational Life: Built for heavy-duty industrial use with an outstanding mechanical life of up to 1,000,000 operations.
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Superior Arc Extinguishing: Features a high-capacity vacuum chamber that ensures rapid arc extinction and prevents external arcing during switching.
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High Precision & Synchronism: Achieves excellent three-phase break-brake synchronism of ≤ 2ms, ensuring balanced and safe power switching.
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Robust Design & Easy Maintenance: Its compact, lightweight structure with porcelain or ceramic insulation frames offers high pressure resistance and significantly longer maintenance intervals.
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Industrial Grade Reliability: Ideal for the most demanding environments, providing stable performance under high-frequency operating conditions.
Technical Specifications
| Item | Unit | CKG3-12/160 | CKG3-12/250 | CKG3-12/400 | CKG3-12/630 |
| Rated Voltage ($U_e$) | kV | 12 | 12 | 12 | 12 |
| Rated Current ($I_e$) | A | 160 | 250 | 400 | 630 |
| Ultimate Breaking Capacity | A | 3200 | 4000 | 4500 | 6300 |
| Mechanical Life | Ops. | 1,000,000 | 1,000,000 | 1,000,000 | 1,000,000 |
| Power Freq. Withstand (Main) | kV | 32 | 32 | 32 | 32 |
| Contact Opening Distance | mm | 5 ± 0.5 | 5 ± 0.5 | 5 ± 0.5 | 5 ± 0.5 |
| Overtravel | mm | 1.5 ± 0.3 | 1.5 ± 0.3 | 1.5 ± 0.3 | 1.5 ± 0.3 |
Normal Working Conditions
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Ambient Air Temperature: Operates reliably between -5°C and +40°C.
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Altitude: Suitable for installations up to 1,000 meters above sea level.
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Relative Humidity: Maximum monthly average of 90% (during the wettest month at 25°C).
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Environment: Best used in areas without obvious vibration, shock, or risk of explosion, gas, and corrosive dust.
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