... A.C.SYNCHRONOUS GENERATORINTRODUCTIONST series generators are used in town, countryside, worksites, villages and pastures as ... prime mover changes 3% or so and load varies in the range of 0~100% Cosφ0. ... , when sudden change (increase or deorease) of load, the generator will soon retum to their normal ... as per standard JB/T8981-1999. And in conformity to IEC34-1.ENVIRONMENT CONDITIONSUnder the following ...