How can the intelligent permanent magnet outdoor high voltage ac vacuum circuit breaker achieve more accurate and reliable opening and closing operations?
Publish Time: 2025-05-08
In the power system, the outdoor high voltage ac vacuum circuit breaker undertakes the important task of breaking and closing the load current, overload current and short circuit current in the power system. The accuracy and reliability of its opening and closing operations are directly related to the safe and stable operation of the power grid. The intelligent permanent magnet outdoor high voltage ac vacuum circuit breaker has achieved significant improvement in this key performance with its advanced permanent magnet mechanism.The core advantage of the permanent magnet mechanism lies in its unique structural design. It abandons the complex energy storage locking device and numerous transmission links in the traditional circuit breaker operating mechanism, and uses permanent magnets to provide holding force to keep the switch in the opening and closing position. This simple structural design greatly reduces the number of mechanical parts and reduces the probability of failure. Due to the large number of parts and long transmission chain, the traditional operating mechanism is prone to mechanical wear and jamming during long-term operation, which affects the accuracy of the opening and closing operation. The permanent magnet mechanism reduces potential sources of failure by simplifying the structure, laying a solid foundation for accurate and reliable opening and closing operations.During the closing operation, when the closing coil of the operating mechanism is energized, the magnetic force generated overcomes the holding force of the permanent magnet on the opening side, so that the moving iron core drives the moving contact of the circuit breaker to close at a specified speed. At this time, the moving iron core can be reliably held on the closing side due to the action of the permanent magnet, and even after the closing coil is powered off, it still has sufficient closing self-holding force to ensure that the circuit breaker is stably in the closed state. This self-holding characteristic avoids the situation where the closing is not in place due to power fluctuations or other interference factors, and ensures the accuracy of the closing operation. At the same time, the closing characteristics of the permanent magnet mechanism and the reaction force characteristics of the vacuum interrupter can achieve a nearly perfect match, making the closing process smoother and more reliable, reducing the impact on the contacts during closing, and extending the service life of the circuit breaker.The opening operation also benefits from the unique design of the permanent magnet mechanism. When the circuit breaker is in the closed position and the opening operation is required, the opening coil of the operating mechanism is energized, and the magnetic force generated overcomes the self-holding force of the permanent magnet on the closing side, so that the moving iron core drives the moving contact of the circuit breaker to open at a specified speed. During the opening process, the permanent magnetic mechanism can accurately control the movement speed and stroke of the moving contact to ensure that the circuit breaker is reliably disconnected within the specified time. Moreover, when the circuit breaker reaches the opening position, the system can automatically disconnect the power supply of the opening coil and open the closing operation at the same time to prepare for the next closing operation. This intelligent control method makes the opening operation more accurate and efficient, avoids problems such as inadequate opening or too long opening time, and effectively improves the fault removal capacity of the power grid.In addition, the permanent magnetic mechanism also has the function of manual opening and closing, which plays an important role in emergency situations. When the control system fails and electric opening and closing operations cannot be performed, the operator can use the manual opening device to reliably open the circuit breaker by turning the opening handle and other methods, and can reliably disconnect the rated current. The existence of the manual opening device provides an additional guarantee for the safe operation of the power system, and further enhances the reliability of the intelligent permanent magnetic outdoor high-voltage AC vacuum circuit breaker.The intelligent permanent magnet outdoor high voltage ac vacuum circuit breaker achieves more accurate and reliable opening and closing operations by virtue of the simple structural design of the permanent magnet mechanism, the precise closing self-holding characteristics, the perfect match with the vacuum interrupter, and the intelligent opening control method. This not only improves the power supply reliability of the power system, reduces the occurrence of power outages, but also reduces the maintenance cost of the equipment, providing strong support for the safe and stable operation of the power system. With the continuous development of power technology, the intelligent permanent magnet outdoor high voltage ac vacuum circuit breaker will surely play a more important role in the power system.
