... Insulation Dry-Type TransformerSG(C)10 series is a new kind transformer with the advantages of low loss, high efficiency, safety ... height above the sea level is below 1000m Ambient temperature: Highest air temperature +40ºC Highest daily average air ... load fluctuating, unventilated, incommodious, dirty and moist environment such as power plant field, subway, metallurgy, hospital, high-rise building, ...