CKG12 low voltage contactor – Reliable Electromagnetic Vacuum Switching for Mining Environments

Despite its name referencing "low voltage" in legacy classifications, the CKG12 low voltage contactor is in fact a robust **12kV medium-voltage vacuum contactor** engineered specifically for demanding mining applications. Designed to operate reliably in explosive and high-dust underground conditions, it integrates seamlessly into flameproof electromagnetic starters for motor control, conveyor systems, and auxiliary power distribution.

The electromagnetic contactor for mining equipment leverages hermetically sealed vacuum interrupters to enable arc-free switching, ensuring long electrical life and minimal maintenance—even under frequent start-stop cycles. With rated currents of 160A, 250A, 400A, or 630A, it supports making capacities up to 10×Ie (100 operations) and breaking capacities of 8×Ie (25 operations), backed by a mechanical endurance of **1 million operations**.

Key performance features include:

• Rated voltage: **12 kV AC, 50 Hz**, with 42 kV power frequency withstand capability

• High contact pressure (>85 N) and precise overtravel (2 ± 0.2 mm) for stable conduction

• Compact, rugged housing suitable for **mine explosion-proof enclosures** (per IEC 60079 standards)

• Ideal for integration with protective relays in motor control centers or lighting circuits (e.g., airport/runway systems)

• Operates reliably in Class III pollution environments with high humidity and conductive dust

As shown in the image above, the CKG12’s vertical-mount design and reinforced insulating structure ensure safe isolation and thermal stability during continuous operation. Its compatibility with standard protection modules makes the CKG12 vacuum contactor for mining a future-ready solution for modernizing hazardous-area electrical infrastructure—delivering safety, efficiency, and decades of service with zero routine maintenance.