series SC(B)9,grade 22KV Three-phase,50 2500KVA dr

Rated high voltage:20(20,24)KV Rated low voltage:0.4KV,0.415KV,0.433KVConnection symbol:Dyn11,Yyn0insulation level:LI125AC50/LI0AC3Product feature:1. Advanced and reasonable structure,small volume,light weight,convenient instllstion,maintenance-free and good economy.2. Low noise and loss,good heat dissipation performance,strong loading ability.3. good moisture proof performance,it can runwith 95% relative Humidity.4. Low value of partial discharge,can guarantee long term safety operation in working voltage5. It can increase 40 50% of rated capacity shortly in forced air cooling.6. Good insulation performance,high tolerance for lighting impulse level,and strong ability tobear sudden short circuit.7. It is high mechanical strength and good thermal stability.Because of rational combination for Insulationmaterial,it can obtain the same temperature expansion coefficient with copper conductor.8. The computer temperature controller automatic monitoring and protection provides reliable safeguard for transformer's safety operation9. It is strong ability of flame retardant and automatic flameout.It can install in load center.Product application scope:High-Rise Building,Commercial center,City square,Hospital,School,Airport,Station,Seaport,Underground,Power station,Oilfield,Chemical Industry,Tunnel and so on.Normal using condition:indoor using Installation site altitude can not be over 1000m;high pressuretype installation site altitude can not be over 4000m Environment Temperature:from -30oC to +40oC Relative Humidity:95% In non-normal using condition,customer could request special design.According to customer requirement,we can provide insulation endurance class for H level(180oC)and other transformer with different voltage class,impedance voltage and connection symbol.