VD4-AF

ABB VD4/AF Product Performance

1. High-Performance Vacuum Breaking Technology Utilizing the vacuum arc-extinguishing principle, it can quickly extinguish the arc, providing excellent insulation recovery and breaking performance while reducing contact burn-off.

2. Reliable Short-Circuit Current Breaking Capacity VD4/AF can be used for switching normal load currents in medium-voltage power distribution systems and can break fault currents according to the rated parameters of specific models, providing protection for lines, transformers, and other medium-voltage equipment.

3. High Mechanical Durability The operating mechanism is designed for the long-term operation requirements of medium-voltage switchgear, meeting the requirements of frequent operation and long-term use. Specific mechanical life ratings and number of operations should refer to the technical datasheet for the corresponding VD4/AF model.

4. Stable Electrical Life The contacts inside the vacuum interrupter operate in a vacuum environment, resulting in relatively less arc erosion of the contacts, which helps maintain stable breaking performance over a long period.

5. Fast and Stable Closing and Opening Performance: The circuit breaker operating mechanism can quickly complete closing and opening actions, and cooperates with the relay protection system to promptly disconnect faulty circuits after detecting short circuits or other faults.

6. Reliable Operating Mechanism: Utilizing an energy storage mechanical operating mechanism, it can be equipped with energy storage motors, closing coils, opening coils, auxiliary contacts, and other accessories, supporting both on-site and remote electrical operation.

7. Comprehensive Control and Protection Coordination Capabilities: It can cooperate with relay protection, measurement, and automation control systems to achieve functions such as fault protection, remote closing and opening, status feedback, and electrical interlocking.

8. Low Maintenance Workload: The vacuum interrupter uses a sealed design, eliminating the need for replenishing the arc-extinguishing medium. Under normal operating conditions, maintenance is mainly concentrated on the operating mechanism, transmission system, and auxiliary control circuits.

9. Applicable to Medium-Voltage Switchgear: The VD4/AF can be used in medium-voltage switchgear of corresponding designs, suitable for various circuits such as incoming lines, feeders, transformers, and industrial power distribution.

10. Wide Range of Typical Applications: Commonly used in medium-voltage power distribution systems in power distribution, substations, industrial production lines, steel, cement, mining, petrochemical, and infrastructure industries.

VD4/AF Core Performance Summary:

Vacuum arc extinguishing + Reliable short-circuit breaking + Long mechanical life + Stable operating mechanism + Low maintenance requirements + Compatibility with automated control