110KV Power Transformer

Functional characteristics 
Technical Parameters 
6300~120000KVA Two-winding Transformer Fitted Low-noise with On-load On-load Tap-changer 
Rated Capacity (KVA): 6300~120000 KVA 
Vecor Group: Ynd11 
Impedance Voltage (%): 10.5% 
Rated voltage: H. V.: 110, 121 KV (Or as customer requirement) 
L. V.: 10.5, 11,33 KV (Or as customer requirement) 
Tapping range: +/- 5% or +/- 2 * 2.5% (Or as customer requirement) 
Frequency: 50Hz 
Number of phases: 3 
Cooling method: ONAN or ONFN 
Temperature rise limits: Winding ≤ 65K 
Top oil ≤ 60K 
Standards: GB1094 Power transformer 
GB/T6451 Technical data & requirement of three-phase oil immersed power transformer IEC60076 Power transformer 

Service conditions 
The height above the sea level is below 1000m; 
Ambient temperature: 
Highest air temperature +40º C; 
Highest daily average air temperature+30º C; 
Highest annual average air temperature +20º C; 
Lowest outdoor air temperature -25º C; 

Scope of application 
Cooling and auxiliary equipment 
Generally, it is ONAF/ONAN type, when ONAF, it runs with full load; When ONAN, the load is running 67% of the full load. 
The radiator is flake type, the seam between the flakes is welded. 
The open and close of the fan motor are controlled by oil temperature and olad, The controlling apparatus is attached on the transformer. 
The conservator is in capsule type. There is oil-resisance, high temperature proof, air-sealed capsule to insulate the oil and the outside air, so that oil is outside the capsule and air is inside the capsule. In order to improve the stability of the transformer, the air room of the capsule closes the outside air through silicongel breaher.                               Please mention the follwing iterms while give purchase order  : 1.Product type 2.Rated power 3.HV rated voltage (KV) voltage regulation level and tap change percentage 4.(KV) LV rated voltage 5.Impendence voltage percentage(%) 6.Connection symbol 7.Cooling method 8.Special requirement  (such as cooling water temperature , elevation ,phase ,frequency ,on-load tap change dielectric level ,with trolley or not , etc.)