6kV/11kv Oil Immersed Power Transformer
Rated Power: Up to 12500KVA
Primary Voltage: 6, 6.6, 10, 11, 20, 22, 33, 35kV (Customized)
Secondary Voltage: 0.4kV/0.69kV (Customized)
Frequency: 50Hz or 60Hz
Phase: 3 phase
Tap range: ±5% or ±2×2.5% (Customized)
Notes: The S13 series oil-immersed power transformer is customizable in capacity, voltage combination, impedance voltage, vector group, tap range, and cooling/protection methods to meet diverse distribution and industrial requirements.
Zhejiang Tianrun Electric Co., Ltd. is one of the leading manufacturers and suppliers of 6kv/11kv oil immersed power transformer in China. We are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk advanced 6kv/11kv oil immersed power transformer from our factory. Also, quotation is available.
Product Overview
The S13-M series is a three-phase, hermetically sealed oil-immersed distribution transformer independently developed as an evolutionary upgrade to the proven S11 platform. Designed and type-tested in accordance with IEC 60076 (Parts 1, 2, 3, 5 and 10), the product integrates high-grade grain-oriented silicon steel, step-lap core construction and optimized winding geometry to minimize no-load losses and acrostic emissions.
Advantages & Features
Optimized Magnetic Circuit for Stable Energy Saving
Adopting high-grade silicon steel sheets and precision step-lamination technology ensures uniform magnetic flux distribution, effectively reducing long-term no-load loss and delivering stable and considerable energy-saving benefits during continuous operation.
Low-Noise Operation & Excellent Environmental Adaptability
Improved core lamination accuracy suppresses magnetostrictive vibration, realizing lower operating noise and smoother operation, which is friendly to noise-sensitive residential, educational and commercial areas.
Superior Temperature Rise Control for Continuous Operation
Optimized winding heat dissipation structure ensures uniform heat distribution and avoids local overheating, supporting stable all-day continuous operation for commercial and industrial scenarios.
International Energy Efficiency Compliance for Global Upgrading Projects
Compliant with mainstream international power distribution energy efficiency specifications, it adapts to overseas park upgrading, green factory construction and new energy supporting projects, meeting regional engineering acceptance standards worldwide.
Meaning of Product Model
Note: More technical parameters of the transformer can not be reflected in the model, more information is required to check the technical parameters.
Product Parameter
Oil-immersed Transformer S13 Series Product Parameter Table
|
Rated capacity (KVA) |
Connect groups |
Voltage combination (KV) |
No-load loss (W) |
Load loss (W) |
No-load current |
Short-circuit impedance (%) |
||
|
High-voltage |
Tapping range |
Low-voltage |
||||||
|
30 |
Yyno or Dyn11 |
6 6.3 10 |
±5% Or ±2×2.5% |
0.4 |
80 |
630 |
2.3 |
4.0 |
|
50 |
100 |
910 |
2.0 |
4.0 |
||||
|
63 |
110 |
1090 |
1.9 |
4.0 |
||||
|
83 |
130 |
1310 |
1.9 |
4.0 |
||||
|
100 |
150 |
1580 |
1.8 |
4.0 |
||||
|
125 |
170 |
1890 |
1.7 |
4.0 |
||||
|
160 |
200 |
2310 |
1.6 |
4.0 |
||||
|
200 |
240 |
2730 |
1.5 |
4.0 |
||||
|
250 |
290 |
3200 |
1.4 |
4.0 |
||||
|
315 |
340 |
3830 |
1.4 |
4.0 |
||||
|
400 |
410 |
4520 |
1.3 |
4.0 |
||||
|
500 |
480 |
5410 |
1.2 |
4.0 |
||||
|
630 |
570 |
6200 |
1.1 |
4.5 |
||||
|
800 |
680 |
7500 |
1.0 |
4.5 |
||||
|
1000 |
850 |
10300 |
1.0 |
4.5 |
||||
|
1250 |
970 |
12000 |
0.9 |
4.5 |
||||
|
1600 |
1170 |
14500 |
0.8 |
4.5 |
||||
|
2000 |
1510 |
17800 |
0.8 |
According to the customer's requirement |
||||
|
2500 |
1780 |
20700 |
0.7 |
|||||
|
3150 |
2100 |
24300 |
0.7 |
|||||
Product Structure Features
Built on traditional structures and mature technologies, our transformers are upgraded with multiple optimized designs:
- Spiral coils with longitudinal oil channels are applied to greatly improve internal heat dissipation performance.
- The supporting structure for coil end faces is upgraded to strengthen resistance against short-circuit currents.
- New lifting and core positioning structures are adopted to guarantee reliability during long-distance transportation and service operation.
Operating Environmental Conditions
|
Name |
Unit |
Standard technical parameters |
|
|
Ambient temperature |
Maximum daily temperature |
℃ |
45 |
|
Minimum daily temperature |
-25 |
||
|
Maximum diurnal temp range |
K |
25 |
|
|
Average temp in hottest month |
℃ |
30 (or provided by the project) |
|
|
Maximum annual average temp |
20 (or provided by the project) |
||
|
Humidity |
Average daily relative humidity |
% |
≤95 |
|
Average monthly relative humidity |
≤90 |
||
|
Height |
m |
≤1000 |
|
|
Intensity of solar radiation |
W/cm2 |
0.1 |
|
|
Maximum ice thickness |
mm |
20 |
|
|
The average maximum wind speed at 10m above the ground for 10 minutes |
m/s |
35 |
|
|
Seismic fortification capability |
Ground level acceleration |
m/s2 |
2 |
|
Installation site |
Outdoors |
||
|
Atmospheric corrosivity levels (C1/C2/C3/C4/C5/CX) |
Confirm with project unit before supply |
||
|
Way to install |
Ground installation or pole installation (platform installation) |
||
Product Application
The S13-M is an energy-saving upgraded mainstream model for overseas civil, commercial and general industrial renovation, perfectly matching projects with standard demands on energy consumption, noise level and operational stability.
- Civil scenarios: Urban residential zones, public schools, community hospitals, nursing homes and municipal public facilities. Its low-noise feature makes it highly suitable for densely populated regions.
- Commercial scenarios: Urban commercial streets, medium & small shopping malls, comprehensive service centers and conventional office buildings.
- Industrial & new energy scenarios: Small and medium green factories, light manufacturing enterprises; small distributed photovoltaic,scattered wind power grid connection and park energy-saving transformation projects.
It is the optimal choice for old equipment replacement and basic energy efficiency upgrade of municipal public projects.
Proccess of Transformer
1-Wire‑wound winding of transfomer
2-Foil‑wound winding of transfomer
3-Vacuum casting of transformer
4-Epoxy resin casting of transfomer
5-Coil assembling over core
6-HV porcelain bushings of oil immersed transformer
7-Lead insulation taping and welding of transfomer
8-Vacuum oil filling of transformer
9-Tank sealing of transformer
Testing of Transformer
1-Measurement of winding resistance testing of transformer
2-Measurement of voltage ratio and check of phase displacement testing of transformer
3-Separate‑source AC withstand voltage testing of transformer
4-Measurement of no‑load loss and no‑load current of transformer
5-Measurement of short‑circuit impedance and load loss of transformer
6-No load loss and no load current testing of transformer
7-Temperature‑rise test of transformer
8-Partial‑discharge measurement of transformer
9-Winding ressitant and voltage ratio testing of transformer
FAQ
Q1: What is the difference between S13 and S11 transformers?
A: S13 is a higher energy-efficiency grade. Compared with S11, S13 reduces no-load loss by approximately 25% and no-load current by about 30%, resulting in lower long-term operating costs. Both use the same oil-immersed, fully sealed construction.
Q2: How do I choose the right capacity?
A: Calculate your total connected load, add a 20–30% safety margin for future expansion, and select the nearest standard kVA rating. Our engineering team can recommend the optimal capacity based on your load profile and duty cycle.
Q3: Can S13 transformers be customized for local grid standards?
A: Yes. Voltage ratio, frequency (50/60 Hz), vector group (Dyn11 / Yyn0), impedance voltage, tap range (±5% or ±2×2.5%), and cooling method can all be tailored to comply with local utility requirements and IEC 60076 standards.
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