- Current Transformer & Potential Transformer
- Circuit Breaker
- Switch & Switchgear
- Arrester & Insulator
- Generating Set
- Wind Turbine System
- Hydro Turbine System
- Beijing Daelim Green EP Tech Co., Ltd.
- No.403 Building 10-1015, Baiziwanxili, Jinhai Commerce & Wealth Center, Chaoyang District, Beijing-100124, China
- COFEKA CIA. LIMITADA
- KM 10,5 VIA A DAULE, GUAYAQUIL, ECUADOR
>>Current Transformer & Potential Transformer >>Combined Transformer >>VAU-Type Combined Transformer
- Product Details
- Make an Inquiry
Our company imported internationally advanced technique and launched this international advanced combined transformer which owns exclusive internationally patent right.And the technique of product has reached the international advanced level .
Combined transformer is used to separate protection and measurement equipment from the high voltage system and change measured current and voltage into suitable current and voltage which are suitable for protection and measurement equipment with reasonable accuracy class.
This combined transformer is designed and manufactured based on IEC-60044-3/80 STANDARD.it is outdoor oil immersed combination product which formed by optimized configuration of current and voltage transformer units,and voltage structure is the same as VPU voltage transformer,and current unit structure is the same as AGU current transformer.
◎Main technical advantage
◆The combined transformer may occupy a small space,its volume is slightly bigger than current transformer in the same voltage level.
◆It can avoids the ferromagnetic resonance phenomenon completely because it is open-core structure on the voltage unit.
◆Primary winding of voltage transformer distributes along insulator height direction.The voltage optimum distribution can be achieved on the direction and the space is reduced greatly.
◆Putting the voltage transformer’s core and winding into cylinder porcelain insulator to make uniform distribution on weight inside transformer and improve production mechanical stability.
◆This combination transformer has the similar manufacture and assembly techniques as inverted current transformer.So the super voltage level product can be made easily.
◆The application of combined transformer can reduce space and investment of substation.Therefore,it is a perfect choice for high-voltage station.
|Highest voltage for equipment,kv||72.5||126||252||550|
|Frequency,hz||50hz or 60hz|
|Rated power-frequency withstand voltage,kv||140||230||395/460||680|
|Rated lighting impulse withstand voltage,kv peak||325||550||950/1050||1550|
|Awitching impulse withstand voltage,kv peak||-||-||-||-|
|standard||GB,IEC,ANSI or others|
|Installation dimension,mm||numberXdiameter of holes||4 X φ20||4 Xφ20||4 X φ20||4 X φ26|
|Distance between holes||520X520||520X520||520X520||650X650|
|Rated primary voltage (KV)||66√3||110√3||220√3||500√3|
|Rated secondary voltage(KV)||0.1√3,011√3|
|Accuracy class||0.2,0.5,1.0,3.0,3P,6P or other|
|Rated burden,VA||100-400 or others|
|Rated primary current (A)||50-6000A|
|Rated secondary current(A)||1A or 5A|
|Short-time thermal current||31.5-63 or other|
|Dynamic current||80-160 or other|
|Accuracy class||For measurement||0.2,0.5,1.0,0.2S,0.5S or other|
|For protection||5P,10P,5PR,PX,X,TPS,TPY,TPZ,C400,C800 or others|
|Instrument security factor FS||5,10|
|Accuracy limit factor ALF||10,15,20,30 or other|
|Rated burden,VA||10-50 or other|