Customization Three-phase Oil-immersed High Voltage Power Transformer 220kV 225kV 330kV 345kV

  • Customization Three-phase Oil-immersed High Voltage Power Transformer 220kV 225kV 330kV 345kV
Key attributes
Brand Vziman
Model NO. Customization Three-phase Oil-immersed High Voltage Power Transformer 220kV 225kV 330kV 345kV
Rated voltage 330kV
Rated frequency 50/60Hz
Rated capacity 6300kVA
Series S
Product descriptions from the supplier
Description

Products Description

Power transformers are the core component of power transmission systems. DB Transformer builds high-performance Oil-Transformer Power Transformer and High Voltage Power Transformer that deliver power to consumers efficiently and reliably.
Vziman single-phase and three-phase multi-winding or autotransformers—including premium Oil-Transformer Power Transformer and High Voltage Power Transformer—are manufactured in accordance with international standards such as ANSI/IEEE, IEC, CSA, AS, and NEMA standards. These transformers cover power ratings up to 270 MVA and voltages up to the highest insulation class of 800 kV, making the High Voltage Power Transformer a top choice for large-scale power grids.
Vziman works relentlessly to exceed emerging market demands by innovating sustainable, safe solutions, offering a wide array of Oil-Transformer Power Transformer products for customers while meeting the most stringent industry standards. Every High Voltage Power Transformer is unique, custom-designed based on individual project factors such as voltage, power rating, climate, network topography, noise level, and many

Technical Data

  • Full-Range Voltage Customization：Covers 220kV/225kV/330kV/345kV high-voltage grades, with the Power Transformer adaptable to global grid standards (e.g., 225kV for Southeast Asia, 345kV for North America). This versatility makes the Oil-Transformer Power Transformer suitable for cross-border power transmission projects.
  • Tailored Configurations：Customizable rated capacity, cooling systems (ONAN/ONAF/OFWF), and vector groups are available for the Oil-Transformer Power Transformer, perfectly matching specific project load and environmental needs of the Power Transformer.
  • Low-Loss & High Efficiency：Advanced amorphous alloy/core technology is applied to the High Voltage Power Transformer, reducing no-load loss by 50% compared with conventional models. This energy-saving feature cuts long-term operational costs of the Oil-Transformer Power Transformer significantly.
  • Robust Oil-Immersed Design：The Oil-Transformer Power Transformer adopts an optimized oil circulation system for stable heat dissipation, supporting 120% overload operation for 2 hours and extending the service life of the High Voltage Power Transformer to 30+ years.
  • International Standard Compliance：Both the Oil-Transformer Power Transformer and High Voltage Power Transformer are manufactured to IEC 60076, ANSI C57, and IEEE standards, with ISO9001 certification to ensure seamless global market access.
  • Durable and Environmentally Adaptable：The Power Transformer features a corrosion-resistant casing and high-grade insulation, enabling reliable operation in high-altitude (≤4000m) and extreme temperature (-40°C to +50°C) environments. This durability also makes the Oil-Transformer Power Transformer ideal for harsh working conditions.
Standard votgages
66 kV
132 kV
69 kV
138 kV
110 kV
161 kV
115 kV
230 kV
121 kV
242 kV
Standard ratings
6300 kVA
25 MVA
120 MVA
8000kVA
30 MVA
150 MVA
10000 kVA
40 MVA
180 MVA
12 MVA
50 MVA
200 MVA
15 MVA
60 MVA
240 MVA
20 MVA
100 MVA
270 MVA
69kV Three Phase Two Winding OLTC Power Transformer
Rating
High Voltage
Low Voltage
No load Loss kw
On load Loss kw
No load Current %
10MVA
 
 
 
 
 
66kV
69kV
 
 
 
 
6.6kV
6.6kV
10.5kV
11kV
11.6
47.6
0.73
12MVA
13.6
56.5
0.53
15MVA
16.3
69.5
0.49
20MVA
19.2
84.2
0.49
25MVA
22.6
99.5
0.42
30MVA
26.8
120
0.42
37.5MVA
31.9
140.3
0.39
50MVA
38.6
174.3
0.39
60MVA
44.4
210
0.39
69kV Three Phase Two Winding NLTC Power Transformer
Rating
High Voltage
Low Voltage
No load Loss kw
On load Loss kw
No load Current %
10MVA
 
 
 
 
66kV
69kV
 
 
 
 
6.6kV
6.6kV
10.5kV
11kV
12.1
47.6
0.73
12MVA
12.6
56.5
0.53
15MVA
15.1
69.5
0.49
20MVA
17.9
84.2
0.49
25MVA
21.1
99.5
0.42
30MVA
25.1
120
0.42
37.5MVA
30
140.3
0.39
50MVA
35.4
174.3
0.39
60MVA
42.1
210
0.39
115kV Three Phase Two Winding OLTC Power Transformer
Rating
High Voltage
Low Voltage
No load Loss kw
On load Loss kw
No load Current %
10MVA
 
 
 
 
110kV
115kV
121kV
138kV
161kV
 
 
 
 
 
6.3kV
6.6kV
10.5kV
11kV
33kV
11.8
51.2
0.82
12MVA
13.7
59.5
0.82
15MVA
16.3
73.1
0.76
20MVA
19.5
88.4
0.76
25MVA
22.7
105
0.69
30MVA
27.4
126
0.69
37.5MVA
32.9
148
0.63
50MVA
38.9
184
0.63
60MVA
46.4
221
0.57
230kV Three Phase Two Winding OLTC Power Transformer
Rating
High Voltage
Low Voltage
No load Loss kw
On load Loss kw
No load Current %
30MVA
 
220kV
230kV
242kV
6.3kV
6.6kV
10.5kV
11kV
34.5kV
66kV
30
128
0.69
37.5MVA
36
149
0.63
50MVA
43
180
0.63
60MVA
50
209
0.57
230kV Three Phase Two Winding NLTC Power Transformer
Rating
High Voltage
Low Voltage
No load Loss kw
On load Loss kw
No load Current %
30MVA
 
220kV
230kV
242kV
6.3kV
6.6kV
10.5kV
11kV
34.5kV
66kV
28
128
0.7
37.5MVA
33
149
0.7
50MVA
39
180
0.65
60MVA
46
209
0.65

Application Scenarios

This customized three-phase oil-immersed model integrates high-performance Oil-Transformer Power Transformer and Power Transformer, applicable to 220kV/225kV/330kV/345kV power systems.
  • Cross-border/regional power grids: The High Voltage Power Transformer adapts to global grid standards, with the Oil-Transformer Power Transformer enabling efficient long-distance power transmission.
  • Large industrial parks: The Oil-Transformer Power Transformer supports high-load continuous operation, and the High Voltage Power Transformer ensures stable power supply for heavy industry.
  • Power plant grid connection: The High Voltage Power Transformer boosts voltage for grid access, with the Oil-Transformer Power Transformer adapting to outdoor harsh environments.

Standard Feature

  • Capacity range:Through 60 MVA (ONAN), with high-voltage ratings through 230 kV (900 kV BIL)
  • Service Location: Outdoor
  • Core: Regular grain-oriented; mitered cruciform with step-lap construction
  • Coils: Cylindrical construction; all copper windings, custom tempered per design requirements; circular windings with rectangular or continuously-transposed conductor;
  • helical low-voltage windings; continuous disc medium-voltage windings; shielded disc high-voltage windings
  • Radiators: Detachable panel type with shut-off valves; mild steel Insulating oil: mineral oil typeⅠ& type Ⅱ
  • Tank Cover: Welded, Bolted
  • Manholes: On cover or tank
  • Tank Base: Flat bottom or Skid under base
  • Tank Material: Mid Steel
  • Frequency: 60 Hertz
  • Winding Tem rise: 55℃
  • HV Taps: DETC, ETC in tank or out
Documentation Resource Library
Globalized Extra HV Distribution Transformer selection catalog
Restricted.
Globalized Extra HV Distribution Transformer selection catalog
Catalogue
English
Consulting
Consulting
Dimension and installation for S11-XXXX/220-66 Oil-immersed distribution transformers
Restricted.
Dimension and installation for S11-XXXX/220-66 Oil-immersed distribution transformers
Drawing
English
Consulting
Consulting
FAQ
Q: How does the structural design of this three-phase high-voltage transformer ensure operational reliability?
A:

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.
Q: What technical advantages does the oil-immersed design offer for 220kV–345kV high-voltage transformers?
A:

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.

 
Q: How does the oil-immersed power transformer work?
A:

Yes. It’s engineered for multi-voltage compatibility: 110kV (Eurasian grids), 121kV/132kV (regional utility standards). It also outputs 35kV/38.5kV, making it ideal for cross-regional power transmission or distribution projects.

Q:How do I know which transformer my project needs?

A: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.

Q:Where can I use oil-immersed power transformer?

A:These transformers can be used in many places, such as power plants, renewable energy projects like solar or wind farms, and in industries that need strong electricity, like factories.
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