CKG3-12 Series 12kV 2-Phase High Voltage AC Vacuum Contactor – 160A-630A Magnetic Switch for Forward/Reverse Motor Control
The CKG3-12 Series 2-Phase Vacuum Contactor is specifically designed for 12kV feed networks operating at AC 50Hz. Featuring a specialized 2-pole configuration, this unit is optimized for the long-distance connecting and breaking of circuits, as well as the frequent starting and stopping of high-voltage AC motors. It is an ideal solution for complex control lines requiring forward and reverse conversion, power braking, and is highly effective as a main switch for high-voltage fan systems. Built for durability, it offers a long mechanical life, high reliability, and requires minimal maintenance.
CKG3-12 Series 12kV 2-Phase High Voltage AC Vacuum Contactor (160A – 630A)
Product Overview
The CKG3-12 Series 2-Phase Vacuum Contactor is a specialized high-voltage switch engineered for 12kV feed networks operating at AC 50Hz. This dual-pole (2-phase) model is designed for the remote connecting and breaking of circuits, and is particularly optimized for the frequent starting and control of high-voltage AC motors. It is a highly effective solution for main switching in electronic control lines, including forward/reverse conversion and power braking.
Core Features & Benefits
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Specialized 2-Phase Design: Features two high-strength white ceramic insulation poles, ideal for specific industrial switching applications like high-voltage fan control.
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Interlocking Capability: When fitted with a mechanical interlocking shaft, two units can achieve both mechanical and electrical interlocking, ensuring safe forward and reverse operations.
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High Reliability & Long Life: Built for durability with a mechanical life of up to 500,000 operations and an AC-3 electrical life of 250,000 operations.
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Compact Maintenance-Free Structure: The vacuum-sealed contacts prevent oxidation and environmental contamination, significantly reducing maintenance requirements.
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Flameproof Integration: Designed for versatility, it can be combined with various protection devices and assembled into flameproof electromagnetic starters for hazardous environments.
Technical Specifications
| Item | Specification |
| Rated Operating Voltage ($U_e$) | 12kV |
| Rated Working Current ($I_e$) | 160A, 250A, 400A, 630A |
| Power Frequency Withstand Voltage | 42kV |
| Lightning Impulse Withstand Voltage | 75kV |
| Rated Breaking Capacity | $8I_e$ (25 times) |
| Rated Closing Capacity | $10I_e$ (100 times) |
| Rated Opening Distance | 5.5 ± 0.5mm |
| Closing Synchronicity | ≤ 2ms |
Standard Working Conditions
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Environmental Suitability: Suitable for both indoor and outdoor installations.
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Ambient Temperature: Reliable operation between -40°C and +40°C.
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Altitude: Standard installation up to 3000 meters (1000m for porcelain sleeve types).
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Power Frequency: Compatible with grid frequencies between 48Hz and 62Hz.
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Seismic Resistance: Rated for areas with an earthquake intensity of 8 degrees or below.
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