(1)   Ambient Temperature for natural gas generator 1mw ——The lower limit value is 25℃； ——The upper limit value is 40 ℃, 45 ℃, 50 ℃. If the ambient temperature is below than -25℃, the auxiliary gas heating is needed to ensure smooth startup. If the ambient temperature is over 40℃, the rated power of the motor is reduced correspondingly, under the condition of good ventilation, the ambient temperature is raised by 5℃and the motor rated power is reduced by 3%. Altitude not more than 4000m(Rated power outputs within 1000m above sea level,1000m < altitude ≤4000m, output power decrease by 5% per 1000m） Electric conduction dust, corrosive gas & explosion hazard are not permitted in the working site. Lighting equipment is requested if works at night, and protective cover is requested to avoid raining & solarization. Lightning protection is requested if works in the open country. (2) Working condition for natural gas generator 500kw Gas Quality Gas quality requirements: natural gas chemical composition is requested to meet the standard stipulated in the GB 17820-2012 GB 17820-2012 Natural Gas as follows.   Requests for natural gas chemical composition Item Parameter Calorific Value/(MJ/m³) ≥31.4 Total Sulfur/(mg/m³) ≤200 H2S/(mg/m³) ≤20 CO2，% ≤3 Dew Point/℃ 5℃。The dew point should be 5℃ lower than the lowest transport temperature under the intersection pressure  1、The standard reference condition of gas volume stipulated in this standard is 101.325kPa&20℃. 2、The dew point should be no higher than -25℃ if the buried temperature of pipe end is -25℃ under transport condition. 3、For the natural gas entering into the pipeline, the pressure of dew point should be the highest transport pressure.                     NOTE: The gas pressure requirements will vary depending on the unit configuration. The gas inlet pressure can be between 3Kpa-20Mpa.