ESW6500CXS-L consists of well known diesel engine and generator; it is well designed by introducing international advanced technology. The oil alert system protects engine from damages by stopping running if the oil drop under the limit. It possesses the advantages of advances design, compact construction, low noise, easy maintenance, etc. It is applicable for using in many places such as telecom, bank, airport where noise pollution are prohibited.Single phase three phase two-way low noise diesel generator sets with constant power output (ESW6500CXS-L consists of well known diesel engine and generator; it is well designed by) introducing international advanced technology. The oil alert system protects engine from damages by stopping running if the oil drop under the limit. It possesses the advantages of advances design, compact construction, low noise, easy maintenance, etc. It is applicable for using in many places such as telecom, bank, airport where noise pollution are prohibited. We especial develop the generator set with ATS, dual voltage for different requirements.