Three phase isolation transformer of new type

الوصف

Three phase isolation transformer is mainly used in low voltage distribution system, isolating load from power supply. Distribution system is divided into TN, TT and IT. The first T indicates that the neutral point of power transformer is directly grounded. I indicates the neutral point of power transformer is non-grounded(or grounded through high impedance). The second T indicates that the case of electrical equipment is directly grounded, but have no connection with the power grid of ground system. And N indicates that the case of electrical equipment is connected with the grounded neutral wire of system.



TN system: the neutral point of power transformer is grounded and the case of equipment is partially connected with neutral wire.

TT system: the neutral point of power transformer is grounded and the case of equipment adopts protection grounding.

IT system: the neutral point of power transformer is non-grounded but the case of equipment adopts protection grounding.



In the IT system, isolation transformer can prevent electric shock, protect the connected equipment from insulation damage and make the neutral point isolated.





Technical parameters:

1, Power range ≤***0KVA 

2, Dielectric strength: winding-winding, winding-earth ***0VAC / *0Hz / *0s no arcing or breakdown

3, Insulation resistance: cross-core screw rob - earth **0VDC, insulation resistance value ≥**0MΩ 

4, Noise level < *5 db (The testing point's horizontal distance from transformer should be 1 metre.)

5, Protection grade: IP*0

6, Insulation class: H

7, Product standards:  IEC**6**1 Dry-type power transformer

                                    GB***4.******7 Dry-type power transformer

                    IEEE.C*7.*2.******5 General requirements for dry-type power distribution and power transformer 





Application environment and conditions:

1, The altitude is not more than ***0 meters and if more than ***0 meters, derating is required.

2, Running temperature: *5℃-*0℃, relative humidity is less than *0%. 

3, Without harmful gas, inflammable, explosive and conductive dust around.