... 3)professional test equipment 4)Low operation cost specification of natural gas generator: Gas Generator - 50 HZ AT 1500/1000 RPMENGINE Alternator DIMENSIONS ModelRated StandbyModelR ... : Heat Value>5500KCAL CH4>50%, Gas Pressure range 0.8-10kpa. 6,Supply Scope: Gas generator set combine with engine and alternator, ... ratings are based on nominal 400/230V, 3ph, 50Hz. 60Hz 200kw natural gas generator