S11 35kV 38.5kv 0.4kv Electric Oil Power Transformer T-12S11-35KV refers to a type of electrical transformer. The "S11" designation typically indicates a three-phase oil-immersed distributio
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10kV/35kV Three-Phase Oil-Immersed Distribution Transformer
Capacity: 63kVA–2500kVA, 15kVA–315000kVA
Voltage: 6, 10, 15, 20, 30, 35kV
Types: S9, S11, S12, S13, S20, S33
Application:
The oil-immersed transformer is suitable for voltage levels from 6kV to 35kV and power ratings from 15kVA to 31500kVA, meeting the needs of various application scenarios.
Description:
This series of three-phase oil-immersed transformers adopts a fully sealed corrugated oil tank, which utilizes the elasticity of oil to accommodate expansion and ensure effective heat dissipation. The tank body features a new insulation structure that enhances short-circuit resistance. The core is made of high-quality cold-rolled silicon steel sheets.
The high- and low-voltage windings are made of oxygen-free copper with a multi-layer cylindrical structure. All fasteners undergo special treatment to prevent loosening. The product is characterized by high efficiency and low losses, significantly reducing energy consumption and operating costs while offering notable social benefits. It is widely used in power plants, substations, industrial and mining enterprises, ports, and airports.
Model Designation
Standards
IEC 60076-1:2011 Power transformers – Part 1: General.
IEC 60076-2:2011 Power transformers – Part 2: Temperature rise for liquid-immersed transformers.
IEC 60076-3:2013+AMD1:2018 Power transformers – Part 3: Insulation levels, dielectric tests and external clearances in air.
IEC 60076-5:2006 Power transformers – Part 5: Ability to withstand short circuit.
IEC 60076-10:2016 Power transformers – Part 10: Determination of sound levels.
Normal Service Conditions
Ambient temperature: not higher than +40℃, not lower than –25℃;
monthly average not exceeding +30℃, annual average not exceeding +20℃.
Altitude: not exceeding 1000 m.
Power supply voltage waveform approximates to a sine wave.
Voltage of the three-phase power supply is approximately symmetrical.
Total harmonic content of load current must not exceed 5% of the rated current.
Installation location: indoor or outdoor.
Product Features
The core is punched from high-quality silicon steel sheets, featuring high performance, high magnetic permeability, and low no-load loss.
The high-voltage winding adopts a layered structure. For 500 kVA and below, the low-voltage winding is of a multi-layer type; for 630 kVA and above, a new spiral structure is applied. This ensures high mechanical strength, balanced ampere-turn distribution, and strong short-circuit resistance.
The body is equipped with positioning structures to prevent movement during transportation. All fasteners are fitted with lock nuts to prevent loosening during long-term operation.
This product features a fully sealed structure. The transformer tank is filled with oil using a vacuum oil-filling process, which thoroughly removes internal moisture, ensures insulation between transformer oil and external air, prevents oil aging, and improves transformer reliability. The product is equipped with safety valves, signal thermometers, and gas relays to ensure safe operation.
Corrugated oil tank design provides convenient processing, high mechanical strength, good welding quality, and no leakage. With excellent oil flow, it also enhances heat dissipation performance.
The product features an elegant appearance, compact size, and small footprint, making it an ideal maintenance-free solution.
Parameter
Three-phase oil-immersed distribution transformer S11-M, 10 kV.
Rated Power (kVA) | Voltage (kV) | Vector Group | Impedance Voltage (%) | No-load Loss (W) | Load Loss (W) | No-load Current (%) | Reference Dimensions (mm) LWH | Total Weight (kg) |
| 30 | High Voltage (HV) Low Voltage (LV) | Dyn11 Yyn0 Yzn11 | 4 | 100 | 630/600 | 1,5 | 690x510x920 | 275 |
| 50 | 130 | 910/870 | 1.3 | 730x510x960 | 340 | |||
| 63 | 150 | 1090/1040 | 1.2 | 750x550x1000 | 385 | |||
| 80 | 180 | 1310/1250 | 1.2 | 790x620x1020 | 450 | |||
| 100 | 200 | 1580/1500 | 1.1 | 790x700x1040 | 520 | |||
| 125 | 240 | 1890/1800 | 1.1 | 840x800x1070 | 625 | |||
| 160 | 280 | 2310/2200 | 1.0 | 1070x670x1130 | 695 | |||
| 200 | 340 | 2370/2600 | 1.0 | 1140x750x1140 | 795 | |||
| 250 | 400 | 3200/3050 | 0,9 | 1200x800x1190 | 955 | |||
| 315 | 480 | 3830/3650 | 0,9 | 1300x860x1210 | 1085 | |||
| 400 | 570 | 4520/4300 | 0,8 | 1380x900x1240 | 1290 | |||
| 500 | 680 | 5410/5100 | 0,8 | 1450x950x1300 | 1590г . | |||
| 630 | Dyn11 Yyn0 | 4,5 | 810 | 6200 | 0,6 | 1500x970x1360 | 1850г. | |
| 800 | 980 | 7500 | 0,6 | 1660x1140x1400 | 2210 | |||
| 1000 | 1150 | 10300 | 0,6 | 1690x1190x1530 | 2570 | |||
| 1250 | 1360 | 12000 | 0,5 | 1760x1230x1600 | 3115 | |||
| 1600 | 1640 г. | 14500 | 0,5 | 1800x1250x1660 | 3520 | |||
| 2000 г. | 5 | 1940 год | 18300 | 0,4 | 1930x1360x1490 | 4060 | ||
| 2500 | 2290 | 21200 | 0,4 | 2080x1360x1570 | 5105 |
2. Three-phase oil-immersed distribution transformer S13-M, 10 kV.
Rated Power (kVA) | Voltage (kV) | Vector Group | Impedance Voltage (%) | No-load Loss (W) | Load Loss (W) | No-load Current (%) | Reference Dimensions (mm) LWH | Total Weight (kg) |
| 30 | High Voltage (HV) Low Voltage (LV) | Dyn11 Yyn0 Yzn11 | 4 | 80 | 630/600 | 1,5 | 695x490x860 | 260 |
| 50 | 100 | 910/870 | 1.3 | 725x520x955 | 365 | |||
| 63 | 110 | 1090/1040 | 1.2 | 750x535x970 | 415 | |||
| 80 | 130 | 1310/1250 | 1.2 | 770x565x985 | 465 | |||
| 100 | 150 | 1580/1500 | 1.1 | 800x595x1000 | 545 | |||
| 125 | 170 | 1890/1800 | 1.1 | 815x670x1010 | 585 | |||
| 160 | 200 | 2310/2200 | 1.0 | 1015x645x1055 | 695 | |||
| 200 | 240 | 2370/2600 | 1.0 | 1020x650x1115 | 810 | |||
| 250 | 290 | 3200/3050 | 0,9 | 1140x730x1120 | 930 | |||
| 315 | 340 | 3830/3650 | 0,9 | 1195x785x1175 | 1075 | |||
| 400 | 410 | 4520/4300 | 0,8 | 1265x855x1195 | 1255 | |||
| 500 | 480 | 5410/5100 | 0,8 | 1325x915x1240 | 1435 | |||
| 630 | Dyn11 Yyn0 | 4,5 | 570 | 6200 | 0,6 | 1465x960x1295 | 1880 г. | |
| 800 | 700 | 7500 | 0,6 | 1515x995x1340 | 2145 | |||
| 1000 | 830 | 10300 | 0,6 | 1605x1095x1460 | 2455 | |||
| 1250 | 970 | 12000 | 0,5 | 1685x1145x1485 | 2840 | |||
| 1600 | 1170 | 14500 | 0,5 | 1775x1225x1580 | 3310 | |||
| 2000 г. | 5 | 1550 г. | 18300 | 0,4 | 1855x1265x1600 | 3960 | ||
| 2500 | 1830 г. | 21200 | 0,4 | 1885x1305x1780 | 4980 |
3.Three-phase oil-immersed distribution transformer S14-M, 10 kV.
Rated Power (kVA) | Voltage (kV) | Vector Group | Impedance Voltage (%) | No-load Loss (W) | Load Loss (W) | No-load Current (%) | Reference Dimensions (mm) LWH | Total Weight (kg) |
| 30 | High Voltage (HV) Low Voltage (LV) | Dyn11 Yyn0 Yzn11 | 4 | 80 | 505/480 | 1,5 | 785x710x880 | 370 |
| 50 | 100 | 730/695 | 1.3 | 800x730x940 | 480 | |||
| 63 | 110 | 870/830 | 1.2 | 815x720x970 | 535 | |||
| 80 | 130 | 1050/1000 | 1.2 | 830x740x990 | 580 | |||
| 100 | 150 | 1260/1200 | 1.1 | 875x790x1010 | 705 | |||
| 125 | 170 | 1510/1440 | 1.1 | 875x770x1050 | 775 | |||
| 160 | 200 | 1850/1760 | 1.0 | 935x820x1140 | 975 | |||
| 200 | 240 | 2180/2080 | 1.0 | 995x870x1140 | 1140 | |||
| 250 | 290 | 2560/2440 | 0,9 | 995x900x1180 | 1240 | |||
| 315 | 340 | 3060/2920 | 0,9 | 1030x880x1250 | 1425 | |||
| 400 | 410 | 3610/3440 | 0,8 | 1075x910x1270 | 1635 г. | |||
| 500 | 480 | 4330/4120 | 0,8 | 1120x930x1320 | 1950 год | |||
| 630 | Dyn11 Yyn0 | 4,5 | 570 | 4960 | 0,6 | 1165x950x1350 | 2150 | |
| 800 | 700 | 6000 | 0,6 | 1210x1050x1390 | 2515 | |||
| 1000 | 830 | 8240 | 0,6 | 1520x1020x1450 | 2635 | |||
| 1250 | 970 | 9600 | 0,5 | 1630x1090x1540 | 3210 | |||
| 1600 | 1170 | 11600 | 0,5 | 1680x1150x1600 | 3905 | |||
| 2000 г. | 5 | 1550 г. | 14600 | 0,4 | 1890x1300x1600 | 4130 | ||
| 2500 | 1830 г. | 16900 | 0,4 | 1990x1360x1700 | 5250 |
1.S13-35 kV Technical Parameters of No-Load Tap-Changing Voltage Regulation Transformer
| Rated Power (kVA) | High Voltage (kV) | Tap Range | Low Voltage (kV) | Vector Group | Impedance Voltage (%) | No-load Loss (W) | Load Loss (W) | No-load Current (%) |
| 50 | 35 38,5 | ±2x2,5% ±5% | 0,4 | Dyn11 Yyn0 | 6,5 | 160 | 1200/1140 | 1.3 |
| 100 | 230 | 2010/1910 | 1.1 | |||||
| 125 | 270 | 2370/2260 | 1.1 | |||||
| 160 | 280 | 2820/2680 | 1.0 | |||||
| 200 | 310 | 3320/3160 | 1.0 | |||||
| 250 | 400 | 3950/3760 | 0,95 | |||||
| 315 | 480 | 4750/4530 | 0,95 | |||||
| 400 | 580 | 5740/5470 | 0,85 | |||||
| 500 | 680 | 6910/6580 | 0,85 | |||||
| 630 | 830 | 7860 | 0,65 | |||||
| 800 | 980 | 9400 | 0,65 | |||||
| 1000 | 1150 | 11500 | 0,65 | |||||
| 1250 | 1400 | 13900 | 0,6 | |||||
| 1600 | 1690 г. | 16600 | 0,6 | |||||
| 2000 г. | 1990 год | 19700 | 0,55 | |||||
| 2500 | 2360 | 23200 | 0,55 |
2.S13-35 kV Technical Parameters of No-Load Tap-Changing Transformer
| Rated Power (kVA) | High Voltage (kV) | Tap Range | Low Voltage (kV) | Vector Group | Impedance Voltage (%) | No-load Loss (W) | Load Loss (W) | No-load Current (%) |
| 630 | 35 | ±2×2,5% ±5% | 3.15 6.3 10,5 | Ярд11 | 6,5 | 830 | 7860 | 0,65 |
| 800 | 980 | 9400 | 0,65 | |||||
| 1000 | 1150 | 11500 | 0,65 | |||||
| 1250 | 1400 | 13900 | 0,55 | |||||
| 1600 | 1690 г. | 16600 | 0,45 | |||||
| 2000 | 2170 | 18300 | 0,45 | |||||
| 2500 | 2560 | 19600 | 0,45 | |||||
| 3150 | 35~38,5 | ±2×2,5% ±5% | 3.15 6.3 10,5 | 7.0 | 3040 | 23000 | 0,45 | |
| 4000 | 3610 | 27300 | 0,45 | |||||
| 5000 | 4320 | 31300 | 0,45 | |||||
| 6300 | 8.0 | 5240 | 35000 | 0,45 | ||||
| 8000 | 35~38,5 | ±2×2,5% | 3.15 3.3 6.3 6.6 10,5 | YNd11 | 7200 | 38100 | 0,35 | |
| 10000 | 8700 | 45300 | 0,35 | |||||
| 12500 | 10000 | 53800 | 0,3 | |||||
| 16000 | 12100 | 65800 | 0,3 | |||||
| 20000 | 14400 | 79500 | 0,3 | |||||
| 25000 | 10,0 | 17000 | 94000 | 0,25 | ||||
| 31500 | 20200 | 112000 | 0,25 |
3.S13-35 kV Technical Parameters of On-Load Tap-Changer (OLTC) Device
| Rated Power (kVA) | High Voltage (kV) | Tap Range | Low Voltage (kV) | Vector Group | Impedance Voltage (%) | No-load Loss (W) | Load Loss (W) | No-load Current (%) |
| 2000 | 35 | ±3×2,5% | 6.3 10,5 | YArd11 | 6,5 | 2300 | 19200 | 0,5 |
| 2500 | 2720 | 20600 | 0,5 | |||||
| 3150 | 35~38,5 | 6.3 10,5 | 7.0 | 3230 | 24700 | 0,5 | ||
| 4000 | 3870 | 29100 | 0,5 | |||||
| 5000 | 4640 | 34200 | 0,5 | |||||
| 6300 | 8.0 | 5630 | 36700 | 0,5 | ||||
| 8000 | 35~38,5 | 6.3 6.6 10,5 | YNd11 | 7870 | 40600 | 0,4 | ||
| 10000 | 9280 | 48000 | 0,4 | |||||
| 12500 | 1090 | 56800 | 0,35 | |||||
| 16000 | 1310 | 70300 | 0,35 | |||||
| 20000 | 1550 г. | 82100 | 0,35 | |||||
| 25000 | 10,0 | 1830 г. | 97800 | 0,3 | ||||
| 31500 | 2180 | 116000 | 0,3 |
Outline Drawing
Oil Transformer Product Series
Related Electrical Equipment
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About Us
Chenyuan Electric is a rapidly growing company with over 15 years of experience in the production and service of electrical power equipment. We are your reliable partner in the field of electrical installation equipment!
In 2019, we established a strategic partnership with Schneider Electric. Gradually expanding our production capacity, we provide comprehensive support for business development. Our factory includes multiple automated production workshops and fully equipped warehouse facilities. The modern European equipment installed in our workshops allows us to manufacture products that meet EU standards.
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All transformers have passed CE, IEC, GOST, and other certifications.
