Overall ranking first! Changkai Gaofen passed the on-site pre qualification review of Sinopec's 0.4kV low-voltage cabinet circuit breakers and contactors through public centralized qualification review-Changshu Switch Manufacturing Co., Ltd. — Building a premium brand and achieving success through high-end excellence.

About Us

Changshu Switch will, as always, join hands with friends from all sectors to forge ahead together and create a brilliant future for China’s low-voltage electrical appliance industry.

Company Overview

Company News

Smart Manufacturing

Overall ranking first! Changkai Gaofen passed the on-site pre qualification review of Sinopec's 0.4kV low-voltage cabinet circuit breakers and contactors through public centralized qualification review

Time:

2026-08-21

Sinopec Material and Equipment Department was successfully carried out at Changshu Switchgear Manufacturing Co., Ltd. The joint audit team composed of SGS audit experts and Sinopec expert group conducted a comprehensive and strict audit of the company's enterprise qualifications, system assurance, technical research and development capabilities, product quality assurance, after-sales service capabilities, and other aspects. After rigorous evaluations, Changshu Switch stood out with its solid comprehensive strength and ultimately achieved an excellent score of 91.2 points, ranking first in the overall ranking.

On July 28, 2026, the on-site pre qualification review of 0.4kV low-voltage switchgear circuit breakers and contactors for
The purpose of this audit is to comprehensively verify the comprehensive strength of suppliers and select reliable and high-quality circuit breaker and contactor products for inspection, maintenance, technological transformation, and new construction projects of various subsidiaries of Sinopec.

Major projects, quality casting foundation
The products of Changshu Switch have been stably operated in numerous national level major petrochemical projects, with outstanding performance: Shanghai Petrochemical's large fiber bundle carbon fiber project, Tahe Refining and Chemical's 10000 ton waste plastic continuous pyrolysis project, Nanhua's aniline new material project, Maoming Petrochemical's ethylene upgrading project, etc. With excellent product quality and stable operational performance, Changshu Switch has accumulated profound application performance and good customer reputation in the petrochemical industry.

Technological innovation, strength leading
Changshu Switch has a national level enterprise technology center and has won the National Science and Technology Progress Award twice. The technical indicators of the CW/CM series circuit breakers have reached the international advanced level. In 2025, it will obtain the industry's first AC2000V universal circuit breaker CQC certification.

Intelligent manufacturing, lean production
The expert group conducted on-site visits to digital factories, covering molds, automated production lines, welding and assembly testing assembly lines. The company has passed authoritative certifications such as ISO 9001 Quality Management System, ISO 14001 Environmental Management System, ISO 50001 Energy Management System, and has been awarded the national green factory certification.

Quality assurance, strict standards
The product quality control is strict, and all testing standards are far higher than the national standard. It has obtained the AAA level certification of Yipaike product quality evaluation for consecutive years and has been selected as a domestic circuit breaker brand within the daily framework of Sinopec for many years.

Looking to the future, continuous empowerment
The passing of the review with the first overall ranking fully confirms Changshu Switch's leading strength in the field of high-end low-voltage electrical appliances. In the future, Changshu Switch will continue to provide high-quality products and efficient services to assist Sinopec and the energy and chemical industry in ensuring the safe and reliable operation of power distribution systems, and promote the greater role of domestic equipment in major national projects.