Sihui Station Service Voltage Transformers

一、Service Conditions

a. Ambient air temperature: maximum +40℃, minimum -45℃, average value of the ambient air temperature does not exceed 30℃ measured during a period of 24h.

b. Altitude: The altitude does not exceed 1000m (this is the routine requirement, if there is any different requirement, we can provide the products with 2000m, 3000m, 4000m or 5000m altitude according to the clients’ requriments).

c. The average value of the relative humidity does not exceed 95% at 25℃ measured during a period of one month.

d. The maximum wind speed does not exceed 34m/s.

e. Eerthquake intensity does not exceed 8 degree.

f. There have to be no gas that may seriously affect the insulation and conductive ability of electric equipments, steam, ash, salt, chemical deposit, pollution and corrosive or explosive material.

二、Main Technical Parameters

1. Rated frequency: 50Hz or 60Hz
2. Rated primary voltage: 35/√3,66/√3,110/√3,132/√3,150/√3,220/√3 kV
3. Rated secondary voltage:  100/√3,110/√3,120/√3,200/√3,400/√3 V
4. Rated output: 10,25,50,75,100,125 kVA
5. Accuracy class for core: 0.2, 0.5, 3P
6. Ambient air temperature: -45 ℃/+40 ℃
7. Altitude: ＜1000m, if need to design exceed 1000m, please declare in the order.

Note: System earthing conditions: Non-effectively earthed neutral system and effectively earthed neutral system.

三、Arcing distance and creepage distance of outer insulation please see table 1.

四、Insulation requirements for the primaries please see table 2.

五、Mechanical requirements for the primary terminals please see table 3.

六、Dimensions Of The Station Service Voltage Transformer

1. The outline and installation dimensions please see drawing 1.
2. The dimensions of the primary termanils please see table 4.    

Note: 

There may be any change of the dimensions for the station service voltage transformer because of renewing, the clients must basis on the updated drawings.