| Brand | Vziman |
| Model NO. | Oil Transformer Electric Substation High-Voltage Power Transformer Manufacturer 115kV-220kV |
| Rated voltage | 220kV |
| Rated frequency | 50/60Hz |
| Series | S11 |
As a leading manufacturer of high-voltage power equipment, we specialize in the design and production of 115kV, 145kV, and 220kV oil-immersed power transformers. Engineered for global utility grids, large-scale substations, and industrial power transmission, our transformers serve as the backbone of reliable power distribution. By integrating advanced core and winding technologies, we deliver stable performance even in the most demanding outdoor environments.
Compliant with IEC, ANSI, and IEEE international standards, our transformers seamlessly integrate into diverse regional grid systems—from North American 115kV/145kV networks to Eurasian 220kV high-voltage transmission projects. We offer flexible customization for rated capacity, cooling modes, and vector groups to meet specific project requirements, ensuring cost-effectiveness and long-term operational reliability.
Multi-Voltage Compatibility: Covers 115kV, 145kV, and 220kV voltage grades, adapting perfectly to various regional grid standards and transmission needs.
Advanced Oil-Immersed Design: Features an optimized oil circulation system for efficient cooling and insulation, ensuring stable operation and extended service life in harsh substation environments.
International Standard Compliance: Manufactured in accordance with IEC, ANSI, and IEEE standards, with complete certifications to support global market access.
Customizable Solutions: Tailor-made designs for rated capacity, cooling modes (e.g., ONAN, ONAF, OFAF), and vector groups to match unique project demands.
Reliable Substation Performance: Robust structural design enhances resistance to short-circuit impacts, making it ideal for long-term operation in high-voltage substations.
Technical Data For 220KV Three-phase Power Transformer On-load Changer ： Duplex Winding (31500KVA~180000KVA)
|
Capacity
(KVA)
|
HV
(KV)
|
LV
(KV)
|
Vector
Group
|
No-load Loss (KW)
|
On-load Loss (KW)
|
No-load Current (%)
|
Short Circuit
Impedance (%)
|
|
31500
40000
50000
63000
90000
|
220
±8*1.25%
|
6.3
6.6
10.5
11
35
37
38.5
|
YNd11
|
38
45
54
63
80
|
135
157
189
220
288
|
0.70
0.63
0.56
0.56
0.49
|
12-14
|
|
120000
150000
180000
|
10.5
11
35
37
38.5
|
99
116
135
|
346
405
468
|
0.49
0.42
0.42
|
|||
|
120000
150000
180000
|
66
69
|
102
120
140
|
355
415
4775
|
0.49
0.42
0.42
|
Technical Data For 220KV Three-phase Power Transformer On-load Changer：Three Winding (31500KVA~240000KVA)
|
Capacity
(KVA)
|
HV
(KV)
|
MV
(KV)
|
LV
(KV)
|
Vector
Group
|
No-load Loss (KW)
|
On-load Loss (KW)
|
No-load Current (%)
|
Capacity
Assignment
(%)
|
Short Circuit
Impedance (%)
|
|
31500
40000
50000
63000
|
220
±8*1.25%
|
69
115
121
|
6.3
6.6
10.5
11
35
37
38.5
|
|
44
52
60
70
|
162
189
225
261
|
0.77
0.70
0.63
0.63
|
100/100/100
100/50/100
100/100/50
|
H-M
12-14
H-L
22-24
M-L
7-9
|
|
90000
120000
150000
180000
240000
|
10.5
11
35
37
38.5
|
92
115
135
156
193
|
351
432
513
630
780
|
0.56
0.56
0.49
0.49
0.45
|
Yes. As a specialized manufacturer, we engineer 115kV/145kV/220kV substation high-voltage oil transformers fully compliant with IEC, ANSI and IEEE standards. Our products are optimized for utility grid projects worldwide, with strict quality control throughout the production process.
Our transformers feature a robust oil-immersed structure that delivers excellent insulation and heat dissipation performance. The optimized core and winding design enhances short-circuit resistance, ensuring stable and long-lasting operation even in high-demand substation power transmission and distribution systems.
Our transformers are designed and manufactured in compliance with IEC, ANSI, and IEEE standards. Complete type test reports and certifications are available to support global market access and grid connection approval.
Yes. We can dispatch experienced engineers for on-site installation guidance, commissioning, and operator training. Remote technical support is also available 24/7 via video or phone.
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