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Medium Voltage Energy-saving Oil Immersed Transformer for Power

Optimized for energy efficiency in medium voltage applications, Pino Electric’s S11 Series Oil-Immersed Transformer minimizes operational costs with premium silicon steel cores. It offers robust short-circuit resistance and low maintenance, supporting 6-20kV systems for power transmission and distribution networks.

Model:
S11 series
Brand:
Pino Electric
Code:
S11

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Description

The S11 series oil-immersed power transformer from Pino Electric is a high-efficiency, fully sealed distribution solution engineered for 6kV-35kV, 50Hz medium voltage power systems. Designed to meet IEC 60076 and GB 1094 international standards, this transformer delivers consistent performance for power and lighting supply across residential communities, commercial districts, industrial and mining enterprises, and rural power grids.

Built with advanced manufacturing technologies and premium raw materials, the S11 series achieves industry-leading low loss, low noise, and high efficiency ratings. Its environmentally friendly design minimizes operational pollution, while reduced maintenance requirements lower total cost of ownership (TCO) over its 30+ year service life.

Key Benefits That Drive Lower Total Cost of Ownership

Industry-Leading Energy Efficiency & Cost Savings

Reduced Core Losses: Utilizes high-grade cold-rolled silicon steel sheets and an optimized stepped-lap core structure, cutting no-load losses by up to 25% compared to traditional S9 series transformers

Quantifiable Savings: For a 1000kVA S11-M transformer operating 8,000 hours annually, energy savings exceed 12,000 kWh per year, delivering full payback on the equipment premium in 3-5 years

Compliant with Global Energy Standards: Meets EU Ecodesign and China GB 20052 energy efficiency requirements, supporting your ESG and carbon neutrality goals

Superior Reliability & Extended Service Life

Fully Sealed Corrugated Tank: Isolates transformer oil from external air and moisture, preventing oil degradation and insulation failure, eliminating the need for periodic oil changes

Enhanced Short-Circuit Resistance: Special reinforced winding configuration improves mechanical strength, withstanding short-circuit currents without structural damage

Wide Environmental Adaptability: Operates reliably in temperatures from -25°C to +40°C, at altitudes up to 1000m, and in environments with 90% relative humidity (20°C)

Low Noise Operation & Environmental Protection

Advanced Noise Reduction: Innovative core clamping design and optimized winding arrangement reduce operational noise to ≤55dB (for 1000kVA models), meeting strict residential noise regulations

Leak-Proof Construction: Precision welding and sealed gaskets eliminate oil leakage risks, preventing soil and water contamination

Recyclable Materials: Over 95% of transformer components are recyclable at end-of-life

Minimal Maintenance Requirements

Zero Routine Oil Maintenance: Fully sealed design eliminates the need for oil sampling, testing, or replacement for the first 10 years of operation

Easy Access Design: Modular components and accessible inspection points simplify routine checks and troubleshooting, minimizing downtime

Long Service Intervals: Recommended full maintenance only every 15 years, compared to 5 years for conventional transformers

Technical Specifications

Model number	Rated capacity	Join group label	Voltage combination>(kV)			No-load loss	Load loss	No-load current	Short circuit impedance	Dimensions(mm)			Weight(kg)		Gauge
	kVA	Yyn0 or Dyn11	High tension	Tapping range	Low pressure	W	W	%	%	L	W	H	Oil	Weight	mm
S11-M-30	30		6 6.3 10 10.5 11	±5% or ±2×2.5%	0.4	100	600	2.3	4.0	740	665	875	74	283	400*500
S11-M-50	50					130	870	2.0	4.0	770	675	965	88	362	400*500
S11-M-63	63					150	1040	1.9	4.0	820	700	1020	112	442	450*500
S11-M-80	80					180	1250	1.9	4.0	835	705	1040	117	481	450*500
S11-M-100	100					200	1500	1.8	4.0	850	715	1055	122	520	450*500
S11-M-125	125					240	1800	1.7	4.0	1180	740	1115	154	667	500*500
S11-M-160	160					280	2200	1.6	4.0	1225	775	1175	176	788	500*500
S11-M-200	200					340	2600	1.5	4.0	1245	790	1195	193	898	500*500
S11-M-250	250					400	3050	1.4	4.0	1340	880	1230	209	1027	550*500
S11-M-315	315					480	3650	1.4	4.0	1425	935	1260	234	1177	550*500
S11-M-400	400					570	4300	1.3	4.0	1470	955	1330	265	1399	550*600
S11-M-500	500					680	5100	1.2	4.0	1490	960	1405	283	1576	550*600
S11-M-630	630					810	6200	1.1	4.5	1585	1030	1370	317	1771	660*660
S11-M-800	800					980	7500	1.0	4.5	1675	1090	1480	366	2128	660*820
S11-M-1000	1000					1150	10300	1.0	4.5	1775	1175	1530	402	2379	660*820
S11-M-1250	1250					1360	12800	0.9	4.5	1965	1155	1700	542	3023	820*820
S11-M-1600	1600					1460	14500	0.8	4.5	2055	1210	1800	616	3591	820*820

Model number	Rated capacity	Join group label	Voltage combination (kV)			No-load loss	Load loss	No-load current	Short circuit impe dance	Model number	Rated capacity	Join group label	Voltage combination(kV)			No-load loss	Load loss	No-load current	Short circuit impe dance
	kVA	Dyn11	High tension	Tapping range	Low pressure	W	W	%	%		kVA	Dyn11	High tension	Tapping range	Low pressure	W	W	%	%
S11-M-30	30		20	±5% or ±2×2.5%	0.4	90	660	2.1	5.5	S11-M-315	315		20	±5% or ±2×2.5%	0.4	480	4010	1.1	5.5
S11-M-50	50					130	960	2.0	5.5	S11-M-400	400					570	4730	1.0	5.5
S11-M-63	63					150	1145	1.9	5.5	S11-M-500	500					680	5660	1.0	5.5
S11-M-80	80					180	1370	1.8	5.5	S11-M-630	630					810	6820	0.9	6.0
S11-M-100	100					200	1650	1.6	5.5	S11-M-800	800					980	8250	0.8	6.0
S11-M-125	125					240	1980	1.5	5.5	S11-M-1000	1000					1150	11330	0.7	6.0
S11-M-160	160					290	2420	1.4	5.5	S11-M-1250	1250					1350	13200	0.7	6.0
S11-M-200	200					330	2860	1.3	5.5	S11-M-1600	1600					1630	15950	0.6	6.0
S11-M-250	250					400	3350	1.5	5.5

Customization Note: 20kV transformers can be equipped with a transfer switch for easy conversion between 20kV and 10kV input voltages. 24kV and 35kV voltage ratings are also available upon request.

Proven Applications Across Industries

The S11 series transformers have been deployed in over 500 projects worldwide, delivering reliable power to:

Industrial Facilities: Mining operations, manufacturing plants, and processing centers

Commercial Developments: Shopping malls, office buildings, hotels, and hospitals

Residential Communities: Urban housing estates and rural residential areas

Public Infrastructure: Schools, government buildings, and renewable energy projects

Case Example: Supplied 52 units of S11-M-800 transformers for a 200MW industrial park in Jiangsu, China. After 3 years of continuous operation, the customer reported a 22% reduction in distribution energy losses and zero unplanned downtime.

Why Choose Pino Electric for Your Transformer Needs

Pino Electric is a leading manufacturer of medium and high voltage power transformers with over 15 years of industry experience. Our commitment to quality and innovation has earned us the trust of customers in more than 30 countries.

ISO 9001:2015 Certified Quality Management: Every transformer undergoes 12 rigorous quality checks before shipment

In-House R&D Team: Our team of 40+ electrical engineers continuously improves product efficiency and reliability

Flexible Customization: We design transformers to meet your specific voltage, capacity, and environmental requirements

Fast Delivery: Standard models ship within 7-15 days; custom orders ship within 30-45 days

Comprehensive After-Sales Support: 2-year product warranty, lifetime technical support, and on-site installation services available

FAQ

What is the difference between S11 and S9 oil immersed transformers?

S11 transformers use higher-grade silicon steel and optimized core designs, reducing no-load losses by 20-30% compared to S9 models, resulting in significant long-term energy savings.

Can you provide S11 transformers for 24kV and 35kV systems?

Yes, we manufacture S11 series transformers for 6kV, 12kV, 24kV, and 35kV medium voltage applications. Contact our engineering team for custom specifications.