Introduction: In recent years, Quanning has been committed to the business philosophy of "providing users with value-added goods and creating long-term business opportunities for manufacturers", insisting on meeting different needs of clients from variety fields. Under the leadership of the professional R & D team and the active cooperation of colleagues, Quanning has achieved fruitful results, and various new products have been launched one after another.
The 11th anniversary of the founding in 2021 is also the most fruitful year for Quanning in the frequency converter industry. The DC contactors we produced account for 80% of the industry, and our products have been sold all over the world and have been highly recommended by our customers. QNZ1 series
DC Contactor is based on the original QNZ series
Dc Contactor, with advanced technical improvement and product structure innovation. The service performance is improved by 10%-20% compared with the original and it reduces the cost and improves the service life for customers. The production of 30A and 40A relays for frequency converters in the same period has contributed to the development and market of Quanning.
The advent of mute and star sealing contactors for elevators and holding brake contactors for elevators has attracted the high attention of relevant professionals in the industry. In product research and development, we always adhere to the customer use as the first element, and solve the current related problems.
Our mute contactor has the following advantages: ① the overall volume is small, which is convenient for timely replacement afterwards; ② High reliability of external rectifier devices; ③ Wide range of use and other characteristics.
The Star Sealing Contactor has the following advantages: ① no noise during operation, low cost, wide range of use and reduced failure rate; ② It can be replaced seamlessly with strong substitutability; ③ High reliability of external rectifier.
How to improve the arc extinguishing ability of the contact is the significate technical difficulties in the R&D of elevator special holding brake contactor. Compared with other contactors of the same type, our holding brake contactor has the following advantages: we have 8 disconnection contacts at work on both power side and load side when the two-wire circuit is disconnected. When the circuit load is switched, the sectional voltage value of a single contact is about 1/8 of the rated working voltage, and the disconnection speed is increased by 8 times compared with a single contact. Make the arc extinguishing process quickly enter an optimal state.
While Quanning is developing advanced products, we are also actively expand our product line-up, and gradually generate production. The successful research and development of the special mute and star sealing contactor for elevator and the advent of the elevator holding brake contactor have filled the gap in the field of elevator contact safety. In the frequency converter industry, our QNZ1 series of new contactors have been successfully developed and widely promoted. At the same time, the successful production of low-power relays for frequency converters has led us to a higher level in the frequency converter industry.
