Oil Immersed Transformers, Series S11

Oil Immersed Transformers, Series S11

Oil immersed transformers use iron roll cores and highly stable winding support, improving operational reliability. Fully sealed corrugated oil tanks are used to ensure the transformer oil will not come into contact with ambient air and will not absorb external moisture that will result in a loss of insulation strength. Compared to common oil immersed transformers, the fully sealed transformers remove the need from oil storage tanks and ensure transformers are isolated from the air, thus preventing and slowing down oil deterioration and aging, and improving the transformer operational reliability. They are suitable for power systems with a 50Hz AC current, related working voltage of 10kV or below, and operate as power distribution transformers in metallurgical, chemical, textile, and light industries.

Technical parameters
Model Rated capacity Rated capacity
High voltage
Rated capacity
Low voltage
No-load losses(W) Load losses(W) No-load current(%) Short circuit impedance(%) Weight(kg)
Oil weight
Weight(kg)
Product weight
Weight(kg)
Overall weight
Dimensions(mm)
L
Dimensions(mm)
W
Dimensions(mm)
H
Gauge
(mm)
S11-M-30/10 30 11
10.5
10
6.3
6
Tapping link range
±5%
or ±2
×2.5%
0.4 95 600 1.3 4 90 200 400 1050 660 1140 400×400
S11-M-50/10 50 130 870 1.1 100 220 460 1070 710 1180
S11-M-63/10 63 150 1040 1 110 250 500 1110 720 1190
S11-M-80/10 80 170 1250 0.9 115 290 550 1120 730 1200
S11-M-100/10 100 200 1500 0.8 120 350 620 1140 740 1220
S11-M-125/10 125 230 1800 0.8 145 390 700 1180 760 1280
S11-M-160/10 160 270 2200 0.7 175 460 830 1210 780 1280 550×550
S11-M-200/10 200 330 2600 0.7 190 520 910 1240 780 1360
S11-M-250/10 250 390 3050 0.6 200 610 1000 1280 800 1380
S11-M-315/10 315 470 3650 0.6 220 730 1190 1330 860 1390
S11-M-400/10 400 560 4300 0.5 260 900 1430 1360 860 1440 660×660
S11-M-500/10 500 670 5100 0.5 280 1000 1600 1439 920 1480
S11-M-630/10 630 800 6200 0.5 4.5 330 1100 1830 1540 1010 1510
S11-M-800/10 800 980 7500 0.4 450 1280 2300 1610 1030 1660 820×820
S11-M-1000/10 1000 1150 10300 0.4 550 1450 2700 1750 1160 1750
S11-M-1250/10 1250 1360 12000 0.3 630 1800 3200 1800 1260 1810
S11-M-1600/10 1600 1640 14500 0.3 800 2100 3700 1930 1300 1890
S11-M-2000/10 2000 1940 18300 0.3 5 1050 2600 4500 2030 1340 2000 920×920
S11-M-2500/10 2500 2290 21200 0.3 1200 3100 5500 2410 1610 2400
S11-M-3150/10 3150 2730 24300 0.3 1400 4100 7200 2750 1810 2600
Features
  • The coils feature a low axial short circuit force structure. When short circuiting occurs, this structure will reduce the axial short circuit force, thus improving the bearing’s short circuit ability.
  • Transformer bodies feature a highly reliable supporting structure, ensuring the compaction of both upper and lower coil parts. The full body ensures transformers have an exceptional short circuit bearing capability.
  • Relatively low magnetic flux density is part of the design, needed to lower no-load losses and will ensure an unsaturated core flux and small third harmonic when the transformers run under voltage.
  • Transformer tank nuts and bolts are made of 304 stainless steel for a rust resistant performance.
  • The best sealing rings in the country are used, thus improving transformer service life.
Service conditions
  • The highest temperature: +40℃
  • The lowest temperature: -25℃
  • Altitude: <1000m
  • The highest monthly average relative humidity: 90% (20℃)
  • Installation site: Locations without risk of fire or explosion, serious pollution, chemical corrosion, vibration. They can be installed either indoors or outdoors.
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