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6-22kV S-M (S13 / S11) Oil-Immersed Distribution Transformers

1.Energy Efficient
2.Fully Sealed and Maintenance-Free
3.Low Noise Operation
4.High Reliability
5.Compact and Aesthetic Design
6.Customizable according to customer requirements.

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Product Introduction

  • The S-M series (S13 / S11) oil-immersed, fully sealed distribution transformers use high-permeability grain-oriented silicon steel for the core, with a planar laminated core structure and stepped multi-stage joints. They feature low no-load losses and low operating noise.
  • The fully sealed corrugated oil tank is manufactured using vacuum oil-filling technology, providing maintenance-free and long-term stable operation. With a compact structure, excellent performance, and energy-saving design, this series is an ideal choice for modern urban, industrial, and rural power distribution networks.

6-22kV-S-M(S13、S11)-10

Application Scenarios

  • Urban power distribution networks
  • Industrial and mining enterprises, industrial parks
  • Rural power grids and lighting systems
  • Residential areas, commercial streets, and public facilities

6-22kV-S-M(S13、S11)-11

Operating Conditions

  • Ambient temperature: -25℃ to +40℃
  • Altitude: ≤1000 m
  • Relative humidity: Daily average ≤95%, monthly average ≤90% (at 20℃)
  • Installation: Indoor/outdoor, free from fire, explosion hazards, severe pollution, and chemical corrosion
  • Maximum wind speed: ≤35 m/s

6-22kV-S-M(S13、S11)-12

Product Parameter

S11 20KV Oil Immersed Transformer Main Technical Parameters
Rated Capacity (kVA) Voltage Combination  Connection Symbol Off-load Loss    (kW) On-load Loss (KW) (75℃) no-load current(%) Short Circuit Impedance (%)   Weight  (kg)         Dimensions (mm)   
 
HV    （kV) Tapping Range(%) LV             （kV) Oil  Total Length  Width Height
30

20

22     

24

 ±5       ±2×2.5 0.23
              0.38
                0.4
               0.44
             0.48
              0.60

Dyn11

Yyn0

 0.1 0.66 2.1 5.5 75 350 1040 600 1040
50 0.13 0.96 2 5.5 90 445 1040 600 1085
63 0.15 1.145 1.9 5.5 100 500 1080 620 1090
80 0.18 1.37 1.8 5.5 105 535 1110 640 1110
100 0.2 1.65 1.6 5.5 120 580 1235 800 1210
125 0.24 1.98 1.5 5.5 125 660 1245 810 1220
160 0.29 2.42 1.4 5.5 130 700 1265 830 1230
200 0.33 2.86 1.3 5.5 195 835 1140 720 1330
250 0.4 3.35 1.2 5.5 410 1110 1325 850 1490
315 0.48 4.01 1.1 5.5 420 1610 1380 850 1725
400 0.57 4.73 1 5.5 430 1720 1400 885 1810
500 0.68 5.66 1 5.5 480 1940 1500 890 1850
630 0.81 6.82 0.9 6 490 2055 1645 870 1850
800 0.98 8.25 0.8 6 520 2600 1755 1025 1890
1000 1.15 11.33 0.7 6 585 2870 2270 1060 1890
1250 1.35 13.2 0.6 6 620 3560 2400 1120 2040
1600 1.63 15.95 0.6 6 690 4260 2460 1220 2085
2000 1.95 19.14 0.6 6 860 5550 2480 2400 2940
2500 2.34 22.22 0.5 6 990 6320 2480 2620 3040

 

Technical Specifications of S11 Series 30–2500 kVA Three-Phase, Dual-Winding, Off-Load Tap-Changing Distribution Transformers
Rated Capacity (kVA) Voltage Combination and Tap Range Vector Group No-Load Loss (kW) Load Loss (kW) No-Load Current (%) Short-Circuit Impedance (%)
High Voltage (kV) HV Tap Range Low Voltage (kV)
30

6

6.3

10

10.5

11

±5%

±2×2.5%

 0.4

Dyn11

Yyn0

 0.100 0.630/0.600 1.5

4.0

4.5

5
50 0.130 0.910/0.870 1.2
63 0.150 1.090/1.04 1.1
80 0.180 1.310/1.25 1.00
100 0.200 1.580/1.50 0.90
125 0.240 1.890/1.80 0.80
160 0.280 2.310/2.20 0.60
200 0.340 2.730/2.60 0.60
250 0.400 3.200/3.05 0.60
315 0.480 3.83/3.65 0.5
400 0.570 4.52/4.3 0.5
500 0.680 5.41/5.15 0.5
630 0.810 6.20 0.30
800 0.980 7.50 0.30
1000 1.15 10.30 0.30
1250 1.36 12.00 0.20
1600 1.64 14.50 0.20
2000 1.94 18.30 0.20
2500 2.29 21.20 0.20
Note：Transformers can be customized to operate under special service conditions according to user requirements.

 

Technical Specifications of S13 Laminated Core Series 30–2500 kVA Three-Phase, Dual-Winding, Off-Load Tap-Changing Distribution Transformers
Rated Capacity (kVA) Voltage Combination and Tap Range Vector Group No-Load Loss (kW) Load Loss (kW) No-Load Current (%) Short-Circuit Impedance (%)
High Voltage (kV) HV Tap Range Low Voltage (kV)
30 6

6.3

10

10.5

11		 0.4 Dyn11



Yyno		 0.08 0.630/0.600 1.5 4.0



4.5



5
50 ±5%


±2×2.5%		 0.1 0.910/0.870 1.2
63 0.11 1.090/1.04 1.1
80 0.13 1.310/1.25 1
100 0.15 1.580/1.50 0.9
125 0.17 1.890/1.80 0.8
160 0.2 2.310/2.20 0.6
200 0.24 2.730/2.60 0.6
250 0.29 3.200/3.05 0.6
315 0.34 3.83/3.65 0.5
400 0.41 4.52/4.3 0.5
500 0.48 5.41/5.15 0.5
630 0.57 6.2 0.3
800 0.7 7.5 0.3
1000 0.83 10.3 0.3
1250 0.97 12 0.2
1600 1.17 14.5 0.2
2000 1.38 18.3 0.2
2500 1.63 21.2 0.2
Note：Transformers can be customized to operate under special service conditions according to user requirements.

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