On Load Tap Changer，Series S11
On load tap changers change the output voltage through the use of regulating switches that change the number of coils by adjusting the coil tap chargers on one side of the transformers. They are especially suitable for users with large grid fluctuations and requirements for a stable voltage, as they achieve both manual and automatic voltage regulation, even when the power is not turned off. The designed voltage range is generally 10±4×2.5kV, with a suitable tapping range designed according to your demands. Fully sealed corrugated oil tanks are used to ensure transformer oil will not come into contact with ambient air or moisture, which ensures there is no oil aging and improves the service life. Elastic deformation of corrugated plates is used to adjust transformer oil volume changes caused by thermal expansion and contraction. A pressure release safety protection device is equipped, allowing extraneous pressure to be released through pressure relief valves for added safety.
| Model | Rated capacity | Rated capacity High voltage | Rated capacity Low voltage | Connection and vector group | 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 | Yyn0 Dyn11 | 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 |
- The on load tap changer features wide voltage range (4 x2.5%), firmly structure, good short-circuit resistance, and excellent energy saving effect. It reduces the average no-load loss by 30% and no-load current by 45%.
- Fully sealed corrugated oil tanks are used to ensure transformer oil will not come into contact with ambient air or moisture, which slows down oil aging and improves the service life. So it is maintenance-free.
- Elastic deformation of corrugated plates is used to adjust transformer oil volume changes caused by thermal expansion and contraction. A pressure release safety protection device is equipped, allowing extraneous pressure to be released through pressure relief valves for added safety.
