In early 1994, Yu Yankun, chairman of the plant, began to develop zinc oxide chip;
In June 6, 1994, the company achieved business license, Yi Kun company officially established;
In 1995, with the Pingyang County Electric Power Bureau joint venture, the same year 35KV and the following system voltage lightning arrester through Zhejiang Province Power Bureau, to fill the gaps in the province;
In 1996, the arrester series of products included in the provincial spark program, the company was named the provincial spark model enterprises;
Since 1997, has successfully developed the composite lightning protection device, electric railway locomotive arrester and composite insulator, outdoor drop fuse several kinds of new products, through the National Machinery Industry Federation, the identification of the State Ministry of Railways and other departments, the series of products selected national urban and rural power grid renovation recommended products using a directory;
1999, Pingyang County State-owned Assets Investment Bureau shares of the enterprise;
In 2001, the enterprise obtained the right of self export, the composite jacket arrester was selected for the national torch plan project;
In 2002, the arrester series products through the Holland KEMA experimental division authority certification, the product began to enter the international market;
2005, Pingyang exit, and Brazil overseas Chinese Mr. Bao Qiyu set up foreign joint ventures;
In 2006, Yikun brand zinc oxide arrester won the title of famous brand products in Zhejiang Province, in the same year, electrified railway permanent magnetic vacuum circuit breaker products selected national Spark plan project.
2007, the company sales value are breakthrough billion;
In 2008, the company was named the national high-tech enterprises;
In 2009, company technology center through the provincial technology center and the provincial R & D center double identified, in the same year, our company was awarded the industrial enterprises in Wenzhou City Bailong;
2010, the company spring energy storage hydraulic actuator selected major projects in Zhejiang province;
In 2011, the company achieved Wenzhou City, such as the vitality of a harmonious enterprise honor
In 2012, the subway pantograph and roof composite insulator selected in Zhejiang Province outstanding new industrial products;
2013, Yi Kun trademark selected provincial famous trademarks;
Since 2014, the Railway Bullet train high speed rail and insulator number of products made railway system certification, officially entered the high-speed rail car market.