Characteristics of CKG3-7.2KV series high-voltage AC vacuum contactor

• Main circuit
The vacuum switch tube adopts products from well-known domestic manufacturers. Mature technology, reliable quality, and good market reputation.
The cross-sectional area of the conductive strip is superior to similar products. Install a reinforcing plate on the upper end of the fixed end conductive busbar to enhance the connection strength between the copper busbar and the vacuum tube, and prevent the harm caused by the deformation of the copper busbar.
The conductive cross-sectional area of the flexible wire or flexible connection is sufficient. 630A adopts dual dynamic end connection, with low resistance, more reliable, and low temperature rise.
The conductive busbar adopts internationally popular electroplating technology, which not only meets electrical performance requirements but also improves oxidation resistance, making it beautiful and durable.
Electromagnetic system
Adopting a closed structure and equipped with a heat dissipation window, it fully meets the requirements of temperature rise and other usage, and is dustproof and non-magnetic, ensuring safe use. Becoming a structurally complete electrical product is a unique structural approach among similar products.
By optimizing the action structure, the starting power and holding power of the coil are lower than similar products, resulting in lower temperature rise, longer lifespan, and greater reliability.
• Use dynamic armature limit buffer and auxiliary switch head buffer to reduce the impact force of the action, reduce bounce, and improve the reliability of the auxiliary switch action.
3. Action structure
The shaft is supported by coaxiality, with no force jamming and minimal axial movement, which improves the performance and consistency of the movement.
A reasonable operating mechanism ensures the coaxiality of the axial movement of the vacuum tube's conductive rod. Improved the performance and reliability of the contactor. Make the three-phase synchronization and bounce indicators superior to similar products.
Enhance the pressure of the contact spring, increase the contact pressure of the main contact, and improve the electrical and mechanical performance. The indicators are superior to similar products. The mechanical retaining device has a reasonable structure and is reliable to use.
4. Easy to use and maintain
The control circuit wiring terminals have functional markings to facilitate wiring and prevent wiring errors.
The power box and auxiliary switch are easy to replace. The wiring is distinguished by fixed colors for easy inspection.
According to user needs, the wiring terminals can be installed at the front or back of the machine for easy wiring.
The number of auxiliary contacts can be combined according to usage requirements.

Main performance parameters of CKG3-7.2KV series high-voltage AC vacuum contactor

2. Control circuit
2.1. Control voltage Ua: AC or DC 110V, 220V, 380V, or customized according to user requirements.
2.2. Control power: Start<900W and maintain<30W. Machine protection mode: Close<800W, Open<700W.
2.3. Power frequency withstand voltage: 2KV.
3. Auxiliary circuit
3.1. Auxiliary contacts: The conventional products for providing auxiliary contacts for users are two normally closed and three normally open; At most, it is five normally closed and six normally open. Mechanical remains three normally closed and three normally open; Up to six normally closed and six normally open.
3.2. Contact capacity: AC380V 6A; AC220V 10A 。
3.3. Loop contact resistance ≤ 0.1 Ω
3.4. Power frequency withstand voltage: 2KV
4. Action characteristics
4.1. Opening and closing time ≤ 120ms.
4.2. Three phase synchronization time ≤ 2ms.
4.3. Closing bounce time ≤ 5ms.
4.4. Minimum pull in voltage ≤ 85% Ua. 10% Ua ≤ Maximum release voltage ≤ 75% Ua.

CKG3-7.2KV series high-voltage AC vacuum contactor