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High-Quality Oil Immersed Power Transformer from China Suppliers and Factory for Reliable Performance
Advanced technology and good performance
Efficiency: S11 series products are based on the S9 series; no-load loss is reduced by an average of 30%, and no-load current ratio decreases by 70–85%.
Longevity: Average temperature rise is reduced by 10K, and the product life span is more than doubled.
Low Noise: Product operating noise is reduced by an average of 2–4 decibels.
Fully sealed(M)
Select S11(M)FirstM The oil tank adopts a fully sealed structure. Compared with the ordinary oil diffused transformer, the fully sealed distribution transformer eliminates the oil storage cabinet and the corrugated fins of the oil tank replace the oil pipe. As a cooling and heat dissipation element, the corrugated oil tank is manufactured from high-quality cold-rolled thin plates on a dedicated production line. The corrugated fins can expand and contract with the expansion and contraction of the transformer oil volume, thereby isolating the transformer from the atmosphere, preventing and slowing down oil degradation and insulation moisture, enhancing operational reliability, and requiring maintenance for normal operation.
Transformer model meaning
Normal operating conditions of transformer
◇ Altitude not exceeding 1000m;
◇ Ambient temperature: Maximum temperature +40℃; Average temperature in the hottest month +30℃;
◇ The highest annual average temperature is +20℃; the lowest outdoor temperature is -25℃.
Special conditions for use of transformers
◇ Altitude over 1000m;
◇ Ambient temperature: Maximum temperature +40℃; Minimum temperature -45℃;
* Please specify when ordering
Transformer meets the standards
GB 1094.1-1996
GB 1094.3-2003
GB/T6451-1999
GB 1094.3-2003
GB/T6451-1999
GB1094.2-1996
GB1094.5-2003
GB/T 7595-1987
GB1094.5-2003
GB/T 7595-1987
JB/T10088-2004
GB/T 10237-1988
JB/T 3837-1998
GB/T 10237-1988
JB/T 3837-1998
Overall dimensions and installation dimensions
10kV class S11-M Series oil immersed distribution transformer technical parameters
| Rated capacitance (kVA) |
Voltage combination (kV) | Connection method |
Loss (kW) | No-load electricity flow (%) |
Impedance Pressure (%) |
Weight (Kg) | Dimensions (mm) (L × B × H) |
Gauge Vertical/ Horizontal |
||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High pressure | Low pressure | No load | Load (75℃) | Heavy | Oil weight | Total weight | ||||||
| 30 | 11 10.5 10 6.3 6 |
0.4 | Yy115 or Dyn11 |
0.1 | 0.6 | 2.1 | 4 | 185 | 70 | 325 | 750x490x970 | 450/350 |
| 50 | 0.13 | 0.87 | 2 | 255 | 85 | 420 | 770x550x1030 | 450/350 | ||||
| 63 | 0.15 | 1.04 | 1.9 | 280 | 95 | 480 | 800x600x1040 | 450/380 | ||||
| 80 | 0.18 | 1.25 | 1.8 | 320 | 100 | 535 | 810x680x1060 | 450/430 | ||||
| 100 | 0.2 | 1.5 | 1.6 | 380 | 110 | 615 | 820x680x1100 | 550/450 | ||||
| 125 | 0.24 | 1.8 | 1.5 | 440 | 115 | 690 | 1070x700x1150 | 550/470 | ||||
| 160 | 0.28 | 2.2 | 1.4 | 510 | 130 | 800 | 1120x700x1220 | 550/500 | ||||
| 200 | 0.34 | 2.6 | 1.3 | 610 | 150 | 935 | 1160x720x1255 | 550/520 | ||||
| 250 | 0.4 | 3.05 | 1.2 | 720 | 190 | 1110 | 1200x760x1310 | 650/550 | ||||
| 315 | 0.48 | 3.65 | 1.1 | 835 | 200 | 1270 | 1210x780x1320 | 650/550 | ||||
| 400 | 0.57 | 4.3 | 1.0 | 1010 | 240 | 1540 | 1340x880x1360 | 650/550 | ||||
| 500 | 0.68 | 5.15 | 1.0 | 1170 | 260 | 1765 | 1360x890x1430 | 750/600 | ||||
| 630 | 0.81 | 6.2 | 0.9 | 4.5 | 1375 | 320 | 2095 | 1560x1020x1410 | 850/660 | |||
| 800 | 0.98 | 7.5 | 0.8 | 1620 | 365 | 2470 | 1640x1060x1500 | 850/660 | ||||
| 1000 | 1.15 | 10.3 | 0.7 | 1780 | 405 | 2780 | 1720x1160x1540 | 850/660 | ||||
| 1250 | 1.36 | 12 | 0.6 | 2065 | 560 | 3395 | 1790x1190x1740 | 850/660 | ||||
| 1600 | 1.64 | 14.5 | 0.6 | 2470 | 650 | 3990 | 1830x1210x1850 | 850/700 | ||||
| 2000 | 1.94 | 18.3 | 0.6 | 2700 | 695 | 4460 | 2190x1900x1950 | 820/820 | ||||
| 2500 | 2.29 | 21.2 | 0.6 | 3230 | 870 | 5330 | 2240x1940x1980 | 1070/1070 | ||||
10kV class S11-M Technical parameters of series oil-immersed power transformers
| Rated capacitance (kVA) |
Voltage combination (kV) | Connection method |
Loss (kW) | No-load electricity flow (%) |
Impedance Pressure (%) |
Weight (Kg) | Dimensions (mm) (L × B × H) |
Gauge Vertical/ Horizontal |
||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High pressure | Low pressure | No load | Load (75℃) | Heavy | Oil weight | Total weight | ||||||
| 200 | 11 10.5 10 6.3 6 |
6.3 6 3.15 |
Ydn11 | 0.34 | 3.15 | 1.6 | 4.5 | 650 | 160 | 1000 | 1180x740x1270 | 660/660 |
| 250 | 0.4 | 3.6 | 1.7 | 770 | 200 | 1190 | 1230x780x1340 | |||||
| 315 | 0.48 | 4.3 | 1.6 | 900 | 215 | 1360 | 1260x810x1370 | |||||
| 400 | 0.57 | 5.2 | 1.5 | 1080 | 260 | 1650 | 1380x900x1390 | |||||
| 500 | 0.68 | 6.2 | 1.4 | 1250 | 280 | 1890 | 1400x920x1450 | |||||
| 630 | 0.81 | 7.3 | 1.3 | 5.5 | 1470 | 340 | 2245 | 1580x1020x1430 | 820/820 | |||
| 800 | 0.98 | 8.9 | 1.2 | 1735 | 385 | 2645 | 1665x1070x1520 | |||||
| 1000 | 1.15 | 10.5 | 1.1 | 1910 | 430 | 2980 | 1740x1160x1550 | |||||
| 1250 | 1.36 | 12.42 | 1.0 | 2210 | 590 | 3640 | 1820x1210x1740 | |||||
| 1600 | 1.64 | 14.85 | 0.6 | 2640 | 680 | 4270 | 1840x1240x1860 | |||||
| 2000 | 1.96 | 17.82 | 0.9 | 2890 | 725 | 4775 | 2210x1920x1970 | |||||
| 2500 | 2.31 | 20.7 | 0.8 | 3460 | 910 | 8710 | 2260x1970x1995 | 1070/1070 | ||||
| 3150 | 2.73 | 24.3 | 0.8 | 4230 | 1350 | 7085 | 2320x2280x2360 | |||||
| 4000 | 3.36 | 28.8 | 0.7 | 5025 | 1675 | 8150 | 2460x2480x2475 | |||||
| 5000 | 3.99 | 33 | 0.7 | 6020 | 1940 | 9610 | 2575x2640x2590 | |||||
| 6300 | 4.76 | 36.9 | 0.6 | 8125 | 2550 | 12660 | 2640x2820x2810 | |||||
| 8000 | 6.52 | 40.5 | 0.55 | 9620 | 2780 | 15100 | 2710x2840x3040 | 1475/1475 | ||||
| 10000 | 7.70 | 47.7 | 0.55 | 11660 | 3070 | 17480 | 2850x2880x265 | |||||
Frequently Asked Questions (FAQ)
1. What are the key performance improvements of the S11 series over the S9 series?
Compared to the S9 series, the S11 series features an average 30% reduction in no-load loss, a 70–85% decrease in no-load current, a 10K lower average temperature rise (doubling product lifespan), and an average 2–4 dB reduction in operational noise.
2. What does the "M" designation mean in S11-M transformers?
The "M" indicates a fully sealed oil tank structure. This design eliminates the traditional oil storage cabinet (conservator) by utilizing elastic corrugated fins to accommodate oil expansion and contraction.
3. How does the fully sealed corrugated oil tank enhance operational reliability?
The corrugated tank isolates the transformer oil from atmospheric air, preventing oxidation and insulation moisture absorption, which slows oil degradation and ensures dependable, low-maintenance performance.
4. What are the standard operating conditions for the S11-M transformer?
Standard installation requires an altitude not exceeding 1000m, maximum ambient temperature up to +40℃, hottest month average of +30℃, annual average of +20℃, and lowest outdoor temperature down to -25℃.
5. Can this transformer operate in extreme or special environments?
Yes, special models are available for environments with altitudes exceeding 1000m and temperatures ranging from -45℃ to +40℃ upon customer specification during ordering.
6. Which industry and national standards do these transformers comply with?
They fully adhere to GB 1094.1/2/3/5, GB/T 6451-1999, GB/T 7595-1987, JB/T 10088-2004, GB/T 10237-1988, and JB/T 3837-1998 standards.