Applying Ambient Conditions
1. The ambient air temperature is not higher than +40°C, not lower than -10°C;
2. The altitude of the installation site should not exceed 1000 meters for the ordinary type and 4000 meters for the plateau type;
3. The relative humidity of the air, the monthly average maximum relative humidity of the wettest month is 90%, the monthly average minimum temperature of the month is 25C, and the condensation on the product surface due to humidity changes is considered;
4. There is no obvious shaking and shock vibration occasions.
5. In a place without explosion hazard, and there is no gas and dust (including conductive dust) sufficient to corrode insulation;
6. Places without rain and snow.
Features
1.High arc extinguishing capacity
2. Good pressure resistance
3. High operating frequency
4. Long life
5. No arcing out
6. Small volume
7.Light weight
8.Longer maintenance intervals
Product Paramenters
| Main circuit rated voltage (kV) | 7.2 | 7.2 | 7.2 | 7.2 |
| Main circuit rated current (A) | 160 | 250 | 400 | 630 |
| Main circuit Joint capacity (A/100 times) | 1600 | 2500 | 4000 | 6300 |
| Main circuit on-off capability (A/10 times) | 1280 | 2000 | 3200 | 5000 |
| Ultimate breaking capacity (A/3 times) | 3200 | 4000 | 4500 | 6300 |
| Mechanical life (times) | 1000000 | 1000000 | 1000000 | 1000000 |
| Mechanical lock life (times) | 100000 | 100000 | 100000 | 100000 |
| Main circuit power frequency withstand voltage (kV) | 32 | 32 | 32 | 32 |
| Auxiliary circuit power frequency withstand voltage (kV) | 2.5 | 2.5 | 2.5 | 2.5 |
| Control circuit frequency withstand voltage (kV) | 2 | 2 | 2 | 2 |
| Rated operating frequency (time/h) | 300 | 300 | 300 | 300 |
| Mechanical lock operating frequency (time/h) | 30 | 30 | 30 | 30 |
| Contact opening (mm) | 4±0.5 | 4±0.5 | 4±0.5 | 4±0.5 |
| Overtravel (mm) | 1.5±0.3 | 1.5±0.3 | 1.5±0.3 | 1.5±0.3 |
The CKG3‑160/250/400/630 7.2 AC High Voltage Vacuum Contactor is a compact, high‑performance switching device designed for AC high‑voltage applications up to 7.2/12 kV. It uses a vacuum arc‑quenching chamber to reliably open and close loads in medium‑voltage power systems, offering long life, low maintenance, and minimal electric wear compared with traditional air‑contact contactors.
This vacuum contactor is widely used in industrial and commercial power systems, including motor starting, transformer switching, capacitor bank switching, and distribution panels. It is ideal for electrical contractors, industrial plants, commercial facilities, and electrical wholesalers who need a robust, space‑saving solution for medium‑voltage control and protection.
Key product features include:
-
High‑voltage AC switching capability
Rated for 7.2/12 kV AC systems, suitable for medium‑voltage motor control and power distribution. -
Vacuum arc‑quenching technology
Provides fast arc extinction, low contact erosion, and high electrical endurance for frequent switching. -
Compact and modular design
Easy to integrate into switchgear cabinets and custom control panels. -
High mechanical and electrical life
Designed for long‑term operation with reduced maintenance costs in industrial environments. -
Standardized mounting and connection
Compatible with common busbar and cable layouts, simplifying installation by electrical contractors. -
OEM/ODM and low MOQ support
Custom labeling, specifications, and accessories available from the manufacturer, with flexible minimum order quantities. -
Wholesale‑oriented pricing
Competitive wholesale pricing for distributors, wholesalers, and international suppliers sourcing in volume.
As a professional vacuum contactor manufacturer and OEM factory, we supply CKG3‑series vacuum contactors to industrial users, commercial users, electrical contractors, and distributors worldwide, backed by technical documentation and application support.