2. Equipment standards
1st. Name: Three-phase dual winding with stabilization winding on-load voltage regulation oil immersion air-cold power transformer
2ND. Type: SFZ-120000/230 Acceptable
3rd. Rated voltage: 230/34 /25kv
4th. Rated capacity: 100000/120000kVA
5th. Rated voltage ratio: 230± 8× 1.25%/34kV
6th. Rated current: 301/2038A
7th. Phase number: Three
8th. Rated frequency: 50 Hz ± 3%
9th. Connection set: Ynyn0(d11)
10th. Voltage regulating method: Neutral point on-load Regulating
11th. Short circuit impedance: 9.5%(100MVA)
12th. Cooling mode: ONAN/ONAF
13th. Winding insulation level:
Lightning impulse withstand voltage (kV\peak value)  1min Main frequency withstand voltage
(kV\RMS)
Full wave  Chopped wave
High voltage side: 1050 1175 460
Neutral point of high voltage: (1050) ( 460 )
Low voltage side: 170 185 70
Neutral point of low voltage: 170 70
14th. Insulation Level: A OK
15th. Field strength between transformer winding turns is no more than 2kV/mm
16th. Transformer loss (under 75)\no-load current and efficiency
No-load Loss: 92 kW According to IEC standard
Load Loss: 356 kW According to IEC standard
No-load current: 0.3 % According to IEC standard
17TH. Radio interference and corona
Under the Maximum phase voltage, corona is not visible from outgoing terminal in the night of clear day at outdoor. Radio interference voltage is no more than 2500UV.