1, Power range ≤1600KVA 
2, Dielectric strength: winding-winding, winding-earth 3000VAC / 50Hz / 60s no arcing or breakdown
3, Insulation resistance: cross-core screw rob - earth 500VDC, insulation resistance value ≥100MΩ 
4, Noise level < 65 db (The testing point's horizontal distance from transformer should be 1 metre.)
5, Protection grade: IP00
6, Insulation class: H
7, Product standards:  IEC726-11 Dry-type power transformer

                                    GB1094.11-2007 Dry-type power transformer

                    IEEE.C57.12.01-2005 General requirements for dry-type power distribution and power transformer 

Application environment and conditions:
1, The altitude is not more than 1000 meters and if more than 1000 meters, derating is required.
2, Running temperature: -5℃-40℃, relative humidity is less than 90%. 
3, Without harmful gas, inflammable, explosive and conductive dust around.