The structure of generating sets: the engine has been coupled with generator though v-belt or coupled directly with generator, both of them have been installed on the basis of anti-shock pad, the gen-sets have been fixed on the frame of steel pipes which has four wheels. Other features: It's easy to operate and maintain, control panel, capacitor type, voltage regulator, no-fuse circuit breaker, over-current protection, wheels type design, double-shaft balance design, electric starting.