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S11 Oil Immersed Distribution Transformer (6–35 kV)

Sealed oil-immersed distribution transformer for 6–35 kV networks, with silicon-steel core construction and configuration-specific technical tables.

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Description

The S11 oil immersed distribution transformer uses a silicon-steel core and a sealed oil tank for distribution service in the 6–35 kV range. The published three-phase configurations span 30–6300 kVA and serve utility distribution, industrial facilities and local load centres.

S11 Oil Immersed Distribution Transformer — Key Features

  • Oil-immersed construction provides winding insulation and cooling.
  • Cold-rolled silicon-steel core construction.
  • Sealed tank limits exposure of the insulating oil to ambient air and moisture.
  • Corrugated tank walls accommodate changes in oil volume.
  • Off-circuit tapping options and connection groups are listed by configuration.

Technical Parameters

The tables below retain the published configuration data. Loss-level columns and single-phase tables describe separate variants and must be matched to the specified model.

6/10 kV three-phase distribution configurations, 30–2500 kVA

Energy efficiency grade 1 2 3 Impedance %
Loss level code 14 13 11
Rated capacity (kVA) Voltage combination & tapping range Connection-group code No-load loss W Load loss W No-load loss W Load loss W No-load loss W Load loss W
H.V. (kV) High voltage tapping range % L.V. (kV)
30 6 6.3 10 10.5 11 ±2×2.5 ± 5 0.4 Dyn11 Yzn11 Yyn0 80 505/480 80 630/600 100 630/600 4.0
50 100 730/695 100 910/870 130 910/870
63 110 870/830 110 1090/1040 150 1090/1040
80 130 1050/1000 130 1310/1250 180 1310/1250
100 150 1260/1200 150 1580/1500 200 1580/1500
125 170 1510/1440 170 1890/1800 240 1890/1800
160 200 1850/1760 200 2310/2200 280 2310/2200
200 240 2180/2080 240 2730/2600 340 2730/2600
250 290 2560/2440 290 3200/3050 400 3200/3050
315 340 3060/2920 340 3830/3650 480 3830/3650
400 410 3610/3440 410 4520/4300 570 4520/4300
500 480 4330/4120 480 5410/5150 680 5410/5150
630 Dyn11 Yyn0 570 4960 570 6200 810 6200 4.5
800 700 6000 700 7500 980 7500
1000 830 8240 830 10300 1150 10300
1250 970 9600 970 12000 1360 12000
1600 1170 11600 1170 14500 1640 14500
2000 1550 14600 1550 18300 1940 18300 5.0
2500 1830 16900 1830 21200 2290 21200

6/10 kV three-phase configurations, 630–6300 kVA

Energy efficiency grade 1 2 3 Impedance %
Loss level code 14 13 11
Rated capacity (kVA) Voltage combination & tapping range Connection-group code No-load loss W Load loss W No-load loss W Load loss W No-load loss W Load loss W
H.V. (kV) High voltage tapping range % L.V. (kV)
630 6 6.3 10 10.5 ±2×2.5 ± 5 3 3.15 6.3 Yd11 Dy11 656 6230 656 6920 820 6920 5.5
800 800 7610 800 8460 1000 8460
1000 944 8920 944 9910 1180 9910
1250 1120 10500 1120 11700 1400 11700
1600 1340 12700 1340 14100 1680 14100
2000 1610 15200 1610 16900 2010 16900
2500 1900 17600 1900 19600 2370 19600
3150 2240 20700 2240 23000 2800 23000
4000 10 10.5 3.15 6.3 2760 24600 2760 27300 3450 27300
5000 3280 28200 3280 31300 4100 31300
6300 3910 31500 3910 35000 4890 35000

6/10 kV three-phase configurations, 200–2500 kVA

Energy efficiency grade 1 2 3 Impedance %
Loss level code 14 13 11
Rated capacity (kVA) Voltage combination & tapping range Connection-group code No-load loss W Load loss W No-load loss W Load loss W No-load loss W Load loss W
H.V. (kV) High voltage tapping range % L.V. (kV)
200 6 6.3 10 10.5 ±4×2.5 0.4 Dyn11 Yyn0 304 2610 304 2900 380 2900 4.0
250 352 3080 352 3420 440 3420
315 424 3690 424 4100 530 4100
400 512 4460 512 4950 640 4950
500 608 5300 608 5890 760 5890
630 768 6530 768 7260 960 7260 4.5
800 896 8000 896 8890 1120 8890
1000 1090 9360 1090 10400 1360 10400
1250 1250 11100 1250 12300 1560 12300
1600 1540 13200 1540 14700 1920 14700
2000 1820 16700 1820 18600 2270 18600 5.0
2500 2140 19400 2140 21600 2680 21600

6/10 kV single-phase configurations, 5–160 kVA

Energy efficiency grade 1 2 3 Impedance %
Loss level code 14 13 11
Rated capacity (kVA) Voltage combination & tapping range Connection-group code No-load loss W Load loss W No-load loss W Load loss W No-load loss W Load loss W
H.V. (kV) High voltage tapping range % L.V. (kV)
5 6 6.3 10 10.5 11 ±5 ±2×2.5 2x(0.22~0.24) OR 0.22~0.24 Li0 Li6 24 117 24 130 30 130 3.0
10 36 212 36 235 45 235
16 44 297 44 330 55 330
20 52 346 52 385 65 385
30 64 504 64 560 80 560
40 80 630 80 700 100 700 3.5
50 96 769 96 855 120 855
63 116 918 116 1020 145 1020
80 128 1230 128 1260 160 1260
100 152 1340 152 1480 190 1480
125 184 1580 184 1760 230 1760
160 232 1920 232 2130 290 2130

20 kV three-phase configurations, 30–2500 kVA

Energy efficiency grade 1 2 3 Impedance %
Loss level code 14 13 11
Rated capacity (kVA) Voltage combination & tapping range Connection-group code No-load loss W Load loss W No-load loss W Load loss W No-load loss W Load loss W
H.V. (kV) High voltage tapping range % L.V. (kV)
30 20 ± 5 0.4 Dyn11 Yzn11 Yyn0 80 621/594 80 690/660 100 690/660 5.5
50 104 909/864 104 1010/960 130 1010/960
63 120 1080/1040 120 1200/1150 150 1200/1150
80 144 1290/1230 144 1440/1370 180 1440/1370
100 160 1560/1490 160 1730/1650 200 1730/1650
125 192 1870/1780 192 2080/1980 240 2080/1980
160 232 2290/2180 232 2540/2420 290 2540/2420
200 272 2700/2570 272 3000/2860 340 3000/2860
250 320 3170/3020 320 3520/3350 400 3520/3350
315 384 3790/3610 384 4210/4010 480 4210/4010
400 456 4470/4260 456 4970/4730 570 4970/4730
500 544 5350/5090 544 5940/5660 680 5940/5660
630 648 6140 648 6820 810 6820 6.0
800 784 7430 784 8250 980 8250
1000 920 10200 920 11300 1150 11300
1250 1100 11900 1100 13200 1380 13200
1600 1330 14400 1330 16000 1660 16000
2000 1560 17200 1560 19100 1950 19100
2500 1870 20000 1870 22200 2340 22200

20 kV single-phase configurations, 5–160 kVA

Energy efficiency grade 1 2 3 Impedance %
Loss level code 14 13 11
Rated capacity (kVA) Voltage combination & tapping range Connection-group code No-load loss W Load loss W No-load loss W Load loss W No-load loss W Load loss W
H.V. (kV) High voltage tapping range % L.V. (kV)
5 20 ±5 2x(0.22~0.24) OR 0.22~0.24 Li0 24 122 24 135 30 135 3.5
10 36 221 36 245 45 245
16 44 311 44 345 55 345
20 52 364 52 405 65 405
30 64 526 64 585 80 585
40 80 662 80 735 100 735
50 96 810 96 900 120 900
63 116 963 116 1070 145 1070
80 128 1190 128 1330 160 1330
100 152 1400 152 1560 190 1560
125 184 1660 184 1840 230 1840
160 232 2010 232 2240 290 2240

35 kV three-phase configurations, 50–2500 kVA

Energy efficiency grade 1 2 3 Impedance %
Loss level code 14 13 11
Rated capacity (kVA) Voltage combination & tapping range Connection-group code No-load loss W Load loss W No-load loss W Load loss W No-load loss W Load loss W
H.V. (kV) High voltage tapping range % L.V. (kV)
50 35 38.5 ±2×2.5 ±5 0.4 Dyn11 Yyn0 128 1080/1030 128 1200/1140 160 1200/1140 6.5
100 184 1810/1720 184 2010/1910 230 2010/1910
125 216 2130/2030 216 2370/2260 270 2370/2260
160 224 2540/2410 224 2820/2680 280 2820/2680
200 272 2990/2840 272 3320/3160 340 3320/3160
250 320 3560/3380 320 3950/3760 400 3950/3760
315 384 4280/4080 384 4750/4530 480 4750/4530
400 464 5170/4920 464 5740/5470 580 5740/5470
500 544 6220/5920 544 6910/6580 680 6910/6580
630 664 7070 664 7860 830 7860
800 784 8460 784 9400 980 9400
1000 920 10400 920 11500 1150 11500
1250 1120 12500 1120 13900 1400 13900
1600 1350 14900 1350 16600 1690 16600
2000 1590 17700 1590 19700 1990 19700
2500 1890 20900 1890 23200 2360 23200

Standards

Technical specification reference: IEC 60076-1:2011 (general requirements for power transformers). GB references: GB 1094; GB/T 6451. The applicable requirements and test programme are to be agreed in the project specification.

Applications

  • Utility distribution networks.
  • Industrial and mining facilities.
  • Urban and rural load centres.

Additional information

Product Family

Oil-Immersed

Rated Capacity

5–6300 kVA

Rated Voltage

6–35 kV