Noise-free sealed underground S-Series transformer
Model Definition

Features
Features
² Silent Operation Design
With the support of core noise reduction technology, the operation noise is low, and it is suitable for areas with sensitive acoustic environment such as residential buildings and business parks.
² Fully Sealed Protection
High-grade sealing technology is used to effectively isolate underground moisture and corrosive media and extend the service life of the equipment.
² Compliance with International Standards
Strictly adheres to IEC international standards, meets key parameters such as withstand voltage and loss, and meets the requirements of power grids in most regions around the world.
² Multi-Energy Efficiency Coverage
Covers S11/S13/S20/S22 multiple energy efficiency levels, taking into account energy saving and economy, meeting the needs of different scenarios.
² Flexible Voltage Regulation Adaptation
Supports high-voltage dual voltage conversion and ±2×2.5% precise voltage regulation, adapting to complex power distribution environments and improving power supply stability.
Range of application
The Noise-Free Sealed Underground S-Series Transformers are suitable for a wide range of scenarios, including residential communities, rural settlements, urban residential areas, commercial districts, shopping malls, hospitals, schools, nursing homes, transportation hubs, industrial parks, factories, data centers and communication facilities. They are also applicable to old community renovations, new urban construction projects, outdoor locations, special
Technical specifications
Rated capacity |
Rated voltage |
Vector group |
No-load loss |
Load loss |
No-load current |
Impedance voltage |
||||||||||
HV |
Tapping range (%) |
LV |
11# |
13# |
20# |
22# |
11/13# |
20# |
22# |
11# |
13# |
20# |
22# |
|||
30 |
6 |
±5 |
0.4 |
Dyn11 |
100 |
80 |
70 |
65 |
630/600 |
505/480 |
455/430 |
0.3 |
0.3 |
0.24 |
0.23 |
4 |
50 |
130 |
100 |
90 |
80 |
910/870 |
730/695 |
655/625 |
0.24 |
0.23 |
0.24 |
0.23 |
|||||
80 |
180 |
130 |
115 |
105 |
1310/1250 |
1050/1000 |
945/900 |
0.22 |
0.18 |
0.21 |
0.20 |
|||||
100 |
200 |
150 |
135 |
120 |
1580/1500 |
1265/1200 |
1140/1080 |
0.21 |
0.16 |
0.21 |
0.20 |
|||||
125 |
240 |
170 |
150 |
135 |
1890/1800 |
1510/1440 |
1360/1295 |
0.2 |
0.15 |
0.19 |
0.18 |
|||||
160 |
280 |
200 |
180 |
160 |
2310/2200 |
1850/1760 |
1665/1585 |
0.19 |
0.14 |
0.18 |
0.17 |
|||||
200 |
340 |
240 |
215 |
190 |
2730/2600 |
2185/2080 |
1970/1870 |
0.18 |
0.12 |
017 |
0.16 |
|||||
250 |
400 |
290 |
260 |
230 |
3200/3050 |
2560/2440 |
2300/2195 |
0.16 |
0.12 |
0.14 |
0.13 |
|||||
315 |
480 |
340 |
305 |
270 |
3830/3650 |
3065/2920 |
2760/2630 |
0.16 |
0.11 |
0.13 |
0.12 |
|||||
400 |
570 |
410 |
370 |
330 |
4520/4300 |
3615/3440 |
3250/3095 |
0.16 |
0.11 |
0.13 |
0.12 |
|||||
500 |
680 |
480 |
430 |
385 |
5410/5150 |
4330/4120 |
3900/3710 |
0.16 |
0.1 |
0.12 |
0.11 |
|||||
630 |
810 |
570 |
510 |
460 |
6200 |
4960 |
4460 |
0.15 |
0.09 |
0.12 |
0.11 |
4.5 |
||||
800 |
980 |
700 |
630 |
560 |
7500 |
6000 |
5400 |
0.15 |
0.09 |
0.1 |
0.1 |
|||||
1000 |
1150 |
830 |
745 |
665 |
10300 |
8240 |
7415 |
0.14 |
0.09 |
0.1 |
0.09 |
|||||
1250 |
1360 |
970 |
870 |
780 |
12000 |
9600 |
8640 |
0.13 |
0.08 |
0.1 |
0.09 |
|||||
1600 |
1640 |
1170 |
1050 |
940 |
14500 |
11600 |
10440 |
0.12 |
0.07 |
0.09 |
0.08 |
|||||
2000 |
1940 |
1360 |
1225 |
1085 |
18300 |
14640 |
13180 |
0.11 |
0.09 |
0.09 |
0.08 |
5.5 |
||||
2500 |
2290 |
1600 |
1440 |
1280 |
21200 |
14840 |
13360 |
0.11 |
0.08 |
0.09 |
0.08 |
|||||
3150 |
2750 |
2180 |
|
|
24100 |
|
|
0.11 |
0.08 |
|
|
6 |
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