IP55 series high efficiency environmental protection water-cooled generator is widely used under harsh environments such as blowing sand, dust and moisture. The protection class is raised to IP55, which drastically slows the pace of internal and external subject to erosion and can run stably in the long time under complicated environment. It meets the client request as well as increases the life of the product. In addition, it comparatively produces about 10% lesser noise than normal generator and reduces noise pollution on the ship. At the same time it can reduce user and company’s time and money on generator maintenance and repair, reduces enterprise and society operating cost, which is eco-friendly.