Oil-Immersed Transformer

S22-M Oil-Immersed Power Transformer

S20-M series sealed oil-immersed transformers are high-efficiency, energy-saving power distribution equipment with fully sealed structure, low loss, low noise, and maintenance-free design. They are widely used in urban and rural power grids, industrial and mining enterprises, commercial buildings, and various power distribution systems.

Adopting high-quality silicon steel sheets and advanced technique, the no-load loss is greatly reduced. The fully sealed structure isolates the transformer oil from air, preventing moisture and oxidation, effectively extending service life and ensuring stable and safe operation for a long time.

This series complies with GB/T 6451, GB/T 1094, IEC 60076 and other international and domestic standards, with strong short-circuit resistance, low temperature rise, and reliable performance.

Model: S22-M-□/□

Symbol	Meaning
S	Three-phase
22	Performance design serial number
M	Fully sealed structure
First □	Rated capacity (kVA)
Second □	Voltage class (kV)

Product Features

1. High Efficiency & Low Loss
Optimized core and coil design, lower no-load loss and load loss, obvious energy-saving effect.

2. Fully Sealed & Maintenance-Free
Corrugated tank or sealed structure, no oil replacement, no maintenance required during service life.

3. Strong Short-Circuit Withstand Ability
Reinforced winding structure, excellent mechanical strength, can withstand short-circuit impact.

4. Low Noise & Stable Operation
Low noise design, reliable insulation, long service life, suitable for outdoor long-term operation.

5. Wide Application Range
Suitable for 10kV, 35kV power distribution systems, urban grid, industrial and mining, infrastructure and other fields.

Operating Condition

Item	Specification
Altitude	≤ 1000m
Ambient temperature	-25℃ ~ +40℃
Installation	Outdoor / indoor
Frequency	50Hz / 60Hz

Technical Parameters

S22-M 10kV Series Oil-Immersed Transformer Full Technical Parameters

Model	High Voltage(kV)	Tap Range	Low Voltage(kV)	Vector Group	No-load Loss(W)	Load Loss(Dyn11/Yzn11, W)	Load Loss(Yyn0, W)	No-load Current(%)	Impedance(%)
S22-M-30	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	65	455	430	1.5	4.0
S22-M-50	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	80	655	625	1.3	4.0
S22-M-63	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	90	785	745	1.2	4.0
S22-M-80	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	105	945	900	1.2	4.0
S22-M-100	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	120	1140	1080	1.1	4.0
S22-M-125	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	135	1360	1295	1.1	4.0
S22-M-160	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	160	1665	1585	1.0	4.0
S22-M-200	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	190	1970	1870	1.0	4.0
S22-M-250	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	230	2300	2195	0.9	4.0
S22-M-315	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	270	2760	2630	0.9	4.0
S22-M-400	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	330	3250	3095	0.8	4.0
S22-M-500	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	385	3900	3710	0.8	4.0
S22-M-630	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	460	4460	–	0.6	4.5
S22-M-800	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	560	5400	–	0.6	4.5
S22-M-1000	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	665	7415	–	0.6	4.5
S22-M-1250	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	780	8640	–	0.5	4.5
S22-M-1600	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	940	10440	–	0.5	4.5
S22-M-2000	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	1085	13180	–	0.4	5.0
S22-M-2500	10	±2×2.5% / ±5%	0.4	Dyn11 / Yyn0	1280	13360	–	0.4	5.0

Outline dimension & Install Dimension

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