Distribution Transformers

S(B)11/13/20/22-M Series Outdoor Using Three Phase Oil Immersed Distribution Transformer

Product Overview

The S11/13/20/22 series oil-immersed transformers are electrical equipment specially designed to meet the requirements of high efficiency, energy saving, quiet operation and high reliability. They are suitable for urban and rural power grids, industrial parks and various complex power consumption scenarios. This series of transformers adopts advanced technology and high-quality materials, features excellent electrical performance, and meets the strict requirements of modern power grids for energy conservation and environmental protection

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Product Features

Voltage level: 10～35/0.4kV.
Capacity: 30～3150kVA.
Core Material: Use laminated silicon steel core for three-phase balance and eliminates third harmonic generation.
Energy Efficiency: Significantly reduces no-load losses and excitation current, achieving remarkable energy savings.
Sealing Technology: Fully sealed tank with vacuum oil injection prevents oil aging, eliminates leaks, and requires zero maintenance.
Heat Dissipation: External corrugated fins provide efficient cooling and accommodate oil volume changes, eliminating the need for an oil conservator.
Safety Features: Flexible connections for high/low-voltage leads, pressure relief valve, and temperature monitoring ensure safe operation.
Optional Configuration: High-flash-point oil available upon request for enhanced safety, reliability, and extended service life.

Technical Specifications

Rated capacity (kVA)	HV (kV)	Tapping range (%)	LV (kV)	Vector group	No-load loss 11#(W)	No-load loss 13#(W)	No-load loss 20#(W)	No-load loss 22#(W)	Load loss 11/13#(W)	Load loss 20#(W)	Load loss 22#(W)	No-load current 11#(%)	No-load current 13#(%)	No-load current 20#(%)	No-load current 22#(%)	Impedance voltage (%)
30	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	100	80	70	65	630/600	505/480	455/430	0.3	0.3	0.24	0.23	4
50	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	130	100	90	80	910/870	730/695	655/625	0.24	0.23	0.24	0.23	4
80	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	180	130	115	105	1310/1250	1050/1000	945/900	0.22	0.18	0.21	0.20	4
100	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	200	150	135	120	1580/1500	1265/1200	1140/1080	0.21	0.16	0.21	0.20	4
125	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	240	170	150	135	1890/1800	1510/1440	1360/1295	0.2	0.15	0.19	0.18	4
160	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	280	200	180	160	2310/2200	1850/1760	1665/1585	0.19	0.14	0.18	0.17	4
200	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	340	240	215	190	2730/2600	2185/2080	1970/1870	0.18	0.12	0.17	0.16	4
250	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	400	290	260	230	3200/3050	2560/2440	2300/2195	0.16	0.12	0.14	0.13	4
315	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	480	340	305	270	3830/3650	3065/2920	2760/2630	0.16	0.11	0.13	0.12	4
400	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	570	410	370	330	4520/4300	3615/3440	3250/3095	0.16	0.11	0.13	0.12	4
500	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	680	480	430	385	5410/5150	4330/4120	3900/3710	0.16	0.1	0.12	0.11	4
630	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	810	570	510	460	6200	4960	4460	0.15	0.09	0.1	0.11	4.5
800	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	980	700	630	560	7500	6000	5400	0.15	0.09	0.1	0.1	4.5
1000	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	1150	830	745	665	10300	8240	7415	0.14	0.09	0.1	0.09	4.5
1250	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	1360	970	870	780	12000	9600	8640	0.13	0.08	0.1	0.09	4.5
1600	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	1640	1170	1050	940	14500	11600	10440	0.12	0.07	0.09	0.08	4.5
2000	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	1940	1360	1225	1085	18300	14640	13180	0.11	0.09	0.09	0.08	5.5
2500	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	2290	1600	1440	1280	21200	14840	13360	0.11	0.08	0.09	0.08	5.5
3150	6,6.3,6.6,10,10.5,11	±5 or ±2×2.5	0.4	Dyn11 or Yyn0	2750	2180			24100			0.11	0.08			6