Product Description

Explore the S20 series, a hallmark of our commitment to high-efficiency energy solutions. As an oil filled power transformer certified with secondary energy efficiency, its design is refined to minimize no-load and load losses through an optimized core and windings. Its core and coils are immersed in high-quality insulating oil, providing unparalleled cooling and insulation protection, ensuring long-term stability and durability. Our product line covers a wide range of capacities, including popular models like the 50kva transformer 3 phase and the 100 kva 3 phase transformer, making them ideal equipment for achieving energy saving and consumption reduction in commercial buildings, small factories, and suburban distribution networks.

Parameters

Main Technical Data For 10kV Level, S13-, S20-, S22-M Series Three-Phase Oil-Immersed Distribution Transformers
Rated Power (kVA)	HV Voltage (kV)	H.V.Tap (kVA)	LV Voltage (kV)	Connection Symbol	Short-Circuit Impedance (%)	No-Load Loss (W)			Load Loss (W)			No-Load Current (%)
Rated Power (kVA)	HV Voltage (kV)	H.V.Tap (kVA)	LV Voltage (kV)	Connection Symbol	Short-Circuit Impedance (%)	The S13 type	The S20 type	The S22 type	The S13 type	The S20 type	The S22 type	No-Load Current (%)
30	6 6.3 10 10.5 11 12	±5% ±2×2.5%	0.4~1.0	Dyn11 Yyn0	4	80	70	65	630	505	455	1.2
50						100	90	80	910	730	655	1.04
63						110	100	90	1090	870	785	0.96
80						130	115	105	1310	1060	945	0.96
100						150	135	120	1580	1265	1140	0.88
125						170	150	135	1890	1510	1360	0.88
160						200	180	160	2310	1850	1665	0.80
200						240	215	190	2730	2185	1970	0.80
250						290	260	230	3200	2560	2300	0.72
315						340	305	270	3830	3065	2760	0.72
400						410	370	330	4520	3615	3250	0.64
500						480	430	385	5410	4330	3900	0.64
630					4.5	570	510	460	6200	4960	4460	0.48
800						700	630	560	7500	6000	5400	0.48
1000						830	745	665	10300	8240	7415	0.48
1250						970	870	780	12000	9600	8640	0.40
1600						1170	1050	940	14500	11600	10440	0.40
2000					5	1360	1225	1085	18300	14640	13180	0.32
2500					5	1600	1440	1280	21200	16960	15270	0.32

Product Advantages

High-Efficiency Core – Saves Energy 24/7

Made of high-permeability silicon steel, this core significantly reduces no-load loss. It eliminates energy waste during standby or light-load conditions, cutting your electricity bills and supporting green operations.

Robust Windings – Withstands Short Circuits & Surges

HV windings use a multi-layer cylindrical design; LV windings are cylindrical or helical, both made of high-purity oxygen-free copper. This provides high mechanical strength, balanced ampere-turn distribution, and excellent short-circuit withstand capability. Your transformer stays stable even under grid voltage impulses or sudden faults.

Fully Sealed Protection – Lasts Longer in Harsh Environments

The fully sealed structure and vacuum oil-filling process remove moisture and air, preventing insulation oil from aging. This avoids performance degradation and equipment failure, extending maintenance intervals. Ideal for humid, coastal, or polluted areas.

Multiple Safety Features – Reliable for Outdoor & Critical Use

Includes a pressure relief valve, signal thermometer, anti-loosening fasteners, and multi-layer anti-corrosion coating. These provide real-time fault warnings, structural stability, and weather resistance – keeping your transformer safe outdoors or in key infrastructure.

Flexible Application – One Solution for Many Needs

Wide capacity range (including 50kVA and 100kVA 3-phase models) and flexible installation (ground, pedestal, or pole). Perfect for commercial buildings, small factories, and suburban distribution networks.

Production Equipment

Silicon steel slitting line, stacking machine, winding machines, tank welding robots, vacuum drying ovens, vacuum oil filling system.

Our production equipment

Testing Equipment

A complete set of transformer comprehensive test benches for conducting routine, type, and special tests to ensure 100% compliance with standards.

Factory testing

FAQ

Q: Do you provide smaller capacity transformers like a 50kva transformer 3 phase or a 100 kva 3 phase transformer?

A: Absolutely. The S20 series covers a wide range of capacities, including these popular models. They are perfect for commercial and light industrial applications, balancing performance, efficiency, and cost.

Q: What does "secondary energy efficiency" mean?

A: It means our transformers meet the energy efficiency level standards set by the nation. Compared to standard transformers, they have lower no-load and load losses, saving you considerable electricity costs over long-term use.

Q: What are the standard service conditions for this transformer?

A: The standard conditions are: altitude not exceeding 1000m, maximum ambient temperature +40°C, maximum daily average air temperature +30°C, and minimum outdoor ambient temperature -25°C.

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S20 Series - 10kV Secondary Energy Efficiency Oil Immersed Transformer

Product Description

Parameters

Product Advantages

Production Equipment

Testing Equipment

FAQ