Double Winding Non-excitation Voltage Regulation Transformer: Maximum 420000kVA
Three Winding Non-excitation Voltage Regulation Transformer: Maximum 240000kVA
Double Winding On-load Voltage Regulation Transformer: Maximum 240000kVA
Three Winding On-load Voltage Regulation Transformer: Maximum 240000kVA
Autotransformer: Maximum 360000kVA
Equipment standards
Name: Three-phase dual winding with stabilization winding on-load voltage regulation oil immersion air-cold power transformer
Type: SFZ-120000/230
Rated voltage: 230/34 /25kv
Rated capacity: 100000/120000kVA
Rated voltage ratio: 230± 8× 1.25%/34kV
Rated current: 301/2038A
Phase number: Three
Rated frequency: 50 Hz ± 3%
Connection set: Ynyn0(d11)
Voltage regulating method: Neutral point on-load Regulating
Short circuit impedance: 9.5%(100MVA)
Cooling mode: ONAN/ONAF
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
Insulation Level: A
Field strength between transformer winding turns is no more than 2kV/mm
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
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.
Ratedpower
(kVA) | Valtage | Connction | 9 loss (kW) | 10 loss (kW) | 11 loss (kW) | No-load Loss(%) | Impedence Voltage(%) | | H.V(kV) | L.V(kV) | No-Load Loss | Load Loss | No-Load Loss | Load Loss | No-Load Loss | Load Loss | | 31500 | 230
242
±2×2.5% | 6.3
6.6
10.5
11 | YNd11 | 35 | 135 | 31.5 | 128.3 | 28 | 128.3 | 0.7 | 12-14 | | 40000 | 41 | 157 | 36.9 | 149.2 | 32.8 | 149.2 | 0.7 | | 50000 | 49 | 189 | 44.1 | 179.6 | 39.2 | 179.6 | 0.65 | | 63000 | 58 | 220 | 52.2 | 209 | 46.4 | 209 | 0.65 | | 75000 | 10.5
11
13.8 | 67 | 250 | 60.3 | 237.5 | 53.6 | 237.5 | 0.6 | | 90000 | 77 | 288 | 69.3 | 273.6 | 61.6 | 273.6 | 0.55 | | 120000 | 94 | 345 | 84.6 | 327.8 | 75.2 | 327.8 | 0.55 | | 150000 | 112 | 405 | 100.8 | 384.8 | 89.6 | 384.8 | 0.5 | | 160000 | 11
13.8
15.75
18
20 | 117 | 425 | 105.3 | 403.8 | 93.6 | 403.8 | 0.49 | | 180000 | 128 | 459 | 115.2 | 436.1 | 102.4 | 436.1 | 0.46 | | 240000 | 160 | 567 | 144 | 538.7 | 128 | 538.7 | 0.42 | | 300000 | 189 | 675 | 170.1 | 641.3 | 151.2 | 641.3 | 0.38 | | 360000 | 217 | 774 | 195.3 | 735.3 | 173.6 | 735.3 | 0.38 | | 370000 | 15.75
18
20 | 221 | 790 | 198.9 | 750.5 | 176.8 | 750.5 | 0.38 | | 400000 | 234 | 837 | 210.6 | 795.2 | 187.2 | 795.2 | 0.35 | | 420000 | 242 | 868 | 217.8 | 824.6 | 193.6 | 824.6 | 0.35 |
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Ningbo Ville Electric Co., Ltd. is a company specialized in research, development and production of transformer and high voltage & low voltage electrical power equipment.
It locates in Hi-technical enterprise R & D center zone of Ningbo, Zhejiang province, which is one of the well-know coastal city in China. Its professional engaged in turnkey project contractor of power substation, power plant project and electric power complete equipments.
Working field: Manufacturing, engineering, designing, executing and commissioning for HV and LV electrical products.
Products application:
Power-fossil fuel plant, Steel plant, Infrastructure- railway, international generation, substation, hydropower station, wind power substation, transmission and distribution.
We has excellent experience and good capacity in complete projects equipments in Generation, Substation, Transmission and Distribution from 400V-330kv, especially in Power plant, Substation construction and Transmission line, including of design, complete equipment, installation, Commissioningand after-sales service, and also design the complete Electrical Solutions according to customer's demand. We are mainly services to International State Power Board, Power Construction Contractor, Power Project Contractor, Factories and the Electric Power Project in the world.
In order to achieve the enterprise's strategic target---being stronger, larger, and superior, we continue to expand throughout the world's markets for power transmission and distribution area. And we also actively attach our team to competition, walking forward to the mission of "First-class worldwide electrical equipment supplier"
