S9/S11-M three phase oil immersed 500kva distribution transformer

S9/S11-M three phase 500kva distribution transformer     1. General   The three-phase 500kva distribution transformer applies new type insulating structure and makes short-circuit resistance strong. The iron core of 500kva distribution transformer is made of high-quality cold-rolled silicon-steel plate. High –voltage winding group is made up of high-quality oxygen-free copper lines and it adopts multilayered drum type structure. All fasteners have been processed with special treatment to prevent them from loosening.   As high-tech product that promoted by the country, the product has many advantages such as high efficiency, low loss. Its social benefits are remarkable that 500kva distribution transformer will save much of electricity consumption and operating cost.     1. Standards: GB1094-1996; JB/T10088-2004; GB/T6451-2008; EQV IEC60076 
2. Voltage Grade: 11kV 
3. Voltage Regukation Mode: Off circuit tap changing or on load tap changing 
4. Tapping Range: ± 5%, ± 2× 2.5%, ± 4× 2.5% or others 
5. Frequency: 50Hz; 60Hz 
6. Phase: Three phase 
7. Connection Sign: Yyn0, Dyn11 or others 
8. Short Circuit Impedance: Standard impedance Service Environment
Altitude:≤1000m
Ambient temerature: then highest temperature+40°C, the highest monthly mean temper-ature+30°C; The lowest temperature-10°C, the highest yearly mean temperature+20°C.
Installation environment: inclination of installation place<3º, no obvious dirt and corrosive or flammable gas.  Process and Test         Client  Visits Shipping Our Certificate as below : Our factory     The activities of company