1997: The company introduced German lightning protection technology and began to develop lightning protection devices;

2000: The company established its own lightning protection device brand "SUM", and officially launched it to the market, launching twisted pair signal lightning protection device;

2004: The SUM brand lightning arrester was accepted by the majority of industrial users, and the AC power lightning arrester was launched. At the same time, the company passed the ISO9001 quality management system certification of the SGS international certification organization;

2006: In order to expand the production and sales scale of lightning arresters, the company established "Shanghai Shenkai Electronics Co., Ltd.", specializing in the development, design, production and sales of lightning arresters;

2010: In order to coordinate the company name and product brand, the company changed its name to "Shanghai Shenen Lightning Protection Technology Co., Ltd.", and launched a series of thin twisted pair signal lightning protection devices, feeder signal lightning protection devices and other interface forms of lightning protection product.

2013: The company launched a class I power lightning protection device for overhead transmission lines and direct lightning protection, and passed the test and certification at the Shanghai Lightning Protection Center that year. In the same year, the company launched a signal isolator and isolation safety barrier.

2016: The company launched a surge protector with signal isolation function and a telemetry terminal.

2018: In order to meet the needs of users for intensive installation, the company launched the dual-channel high-energy signal lightning arrester SAC-24/L4, with a total nominal discharge current of up to 40kA.
After decades of ups and downs and the continuous efforts of the company's team, SUM arresters have been accepted by the majority of users in many industries, mainly in municipal tap water, sewage and water conservancy industries. A typical case is Zhejiang Qige sewage treatment. The first and second phases of the plant are mainly for lightning protection of the automatic control system of the sewage plant, and lightning protection for PLC and field instruments. Specifically, the secondary lightning protection device for power supply, communication signal lightning protection device and analog lightning protection device are used. . Others include Shanghai Lingqiao Water Plant, Jiangsu Fuxing Water Plant, Chongqing Wanzhou Sewage Plant, Guangdong Dongguan Central Water Supply Project and so on. At the same time, SUM lightning arresters are also used in building, chemical, gas, rail and other industries. Typical engineering cases include video surveillance lightning protection in the construction of the National Stadium (Bird's Nest) for the 2008 Beijing Olympic Games, automatic control system lightning protection in Guangzhou Panyu Chemical Plant, West Gas Lightning protection of the Chongqing section of the East Transit Railway, Beijing Metro Line 13, etc. According to user feedback, market research and the test of time, the performance and quality of SUM arresters are excellent and have been unanimously affirmed by the majority of users.