| Brand | Vziman |
| Model NO. | Three-phase Oil-immersed High Voltage Power Transformer 220kV 225kV 330kV 345kV |
| Rated voltage | 330kV |
| Rated frequency | 50/60Hz |
| Rated capacity | 6300kVA |
| Series | S |
Vziman three-phase oil-immersed high voltage power transformers, with capacity up to 270 MVA and insulation level up to 800 kV, cover voltage classes including 220kV, 225kV, 330kV, and 345kV. Compliant with IEC 60076, ANSI C57, and IEEE standards, ISO9001 certified, and adaptable to global grid codes, they are compatible with 50Hz / 60Hz grids, with standard vector group YNd11 or customized.
Each transformer is custom-designed to project requirements, adapting to different voltage, capacity, climate, altitude, and network conditions. Supporting ONAN/ONAF/OFWF cooling methods, capable of 120% overload operation for 2 hours, with a design life of 30 years.
Widely used in cross-border transmission, large industrial parks, power plant grid connection, and utility substations. With full-process quality control, UL/cUL, CSA and other third-party certifications and regular audits, we provide on-site installation guidance, commissioning, training, and 24/7 remote support.
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69kV Three Phase Two Winding OLTC Power Transformer
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Rating
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High Voltage
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Low Voltage
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No load Loss kw
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On load Loss kw
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No load Current %
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10MVA
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66kV
69kV
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6.6kV
6.6kV
10.5kV
11kV
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11.6
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47.6
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0.73
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|
12MVA
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13.6
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56.5
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0.53
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||
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15MVA
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16.3
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69.5
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0.49
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||
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20MVA
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19.2
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84.2
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0.49
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||
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25MVA
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22.6
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99.5
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0.42
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||
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30MVA
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26.8
|
120
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0.42
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||
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37.5MVA
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31.9
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140.3
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0.39
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50MVA
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38.6
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174.3
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0.39
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60MVA
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44.4
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210
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0.39
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69kV Three Phase Two Winding NLTC Power Transformer
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Rating
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High Voltage
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Low Voltage
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No load Loss kw
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On load Loss kw
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No load Current %
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10MVA
|
66kV
69kV |
6.6kV
6.6kV
10.5kV
11kV
|
12.1
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47.6
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0.73
|
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12MVA
|
12.6
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56.5
|
0.53
|
||
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15MVA
|
15.1
|
69.5
|
0.49
|
||
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20MVA
|
17.9
|
84.2
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0.49
|
||
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25MVA
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21.1
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99.5
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0.42
|
||
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30MVA
|
25.1
|
120
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0.42
|
||
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37.5MVA
|
30
|
140.3
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0.39
|
||
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50MVA
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35.4
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174.3
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0.39
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60MVA
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42.1
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210
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0.39
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115kV Three Phase Two Winding OLTC Power Transformer
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Rating
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High Voltage
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Low Voltage
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No load Loss kw
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On load Loss kw
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No load Current %
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10MVA
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110kV
115kV
121kV
138kV
161kV
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6.3kV
6.6kV 10.5kV 11kV 33kV
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11.8
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51.2
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0.82
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12MVA
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13.7
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59.5
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0.82
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15MVA
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16.3
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73.1
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0.76
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20MVA
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19.5
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88.4
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0.76
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25MVA
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22.7
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105
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0.69
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30MVA
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27.4
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126
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0.69
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37.5MVA
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32.9
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148
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0.63
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50MVA
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38.9
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184
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0.63
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60MVA
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46.4
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221
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0.57
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230kV Three Phase Two Winding OLTC Power Transformer
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Rating
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High Voltage
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Low Voltage
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No load Loss kw
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On load Loss kw
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No load Current %
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30MVA
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220kV
230kV
242kV
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6.3kV
6.6kV 10.5kV 11kV 34.5kV 66kV |
30
|
128
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0.69
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37.5MVA
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36
|
149
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0.63
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||
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50MVA
|
43
|
180
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0.63
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60MVA
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50
|
209
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0.57
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230kV Three Phase Two Winding NLTC Power Transformer
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Rating
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High Voltage
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Low Voltage
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No load Loss kw
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On load Loss kw
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No load Current %
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30MVA
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220kV
230kV 242kV |
6.3kV
6.6kV 10.5kV 11kV 34.5kV 66kV |
28
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128
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0.7
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37.5MVA
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33
|
149
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0.7
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50MVA
|
39
|
180
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0.65
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60MVA
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46
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209
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0.65
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Note: Customized designs are available for special environmental conditions such as higher altitude, extreme temperatures, or heavy pollution areas.
Choosing the right transformer depends on your power requirements, which includes your voltage needs and how much power you'll use. It's best to consult with a power expert who can help determine the best option for your specific project.
The oil-immersed design serves dual functions as cooling and insulation, ensuring efficient heat dissipation and superior dielectric strength for high-voltage operations. It also provides reliable performance in outdoor high-voltage transmission scenarios, with a proven track record of stability and durability in power grid applications.
We adopt optimized core and winding structures, with secure fastening for key components to enhance mechanical strength and resistance to short-circuit impacts. The sealed tank design isolates the internal insulation oil from external moisture and oxygen, slowing oil aging and maintaining long-term insulation performance.
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