Abb Switchgear,Medium Voltage Switchgear,Indoor Switchgear 1.IEC standard 2.CE,SGS 3.Excellent performance 4.Warranty 1 year Abb Switchgear,Medium Voltage Switchgear,Indoor SwitchgearService condition1. Ambient temperature: -15'C~+40'C2. Altitude: <=1000m3. Air humidity: daily average of Air humidity <=95%, daily average of partial vapor pressure <= 2.2kPa; monthly average of Air humidity <=90%, ...