GF3 series generating sets consists of well-known diesel engine and generator, it is well designed by introducing inter-national advanced technology. They posses the advantages, of advanced design, compact construction, low noise, easy maintenance, etc. They are applcable for using in many places such as telecom, bank, mansion, airport where noise pollution are prohibited. Environment Conditions Under the following conditions the generating sets could continuously run for 12 hours and output the rated power: Above sea level:not exceed 1000m Cooling air temperature:298K(25c) Relative air damping:30% When the envirnments of the generating sets located have some difference the output power should be corrected accor-ding to the relstive standard