T: +86-180-67981129
E:sales@pino-electric.com
E:sales@pino-electric.com
Makou Industrial Park, Yongxiu County, Jiujiang city, Jiangxi Province, China
Pino Electric's S11M series oil-immersed transformers are IEC 60076 certified, high-performance power solutions engineered for medium-voltage transmission and distribution systems. Designed with a fully sealed corrugated tank structure, these three-phase transformers deliver reliable operation in 10kV, 50Hz networks, with customizable options for 6kV, 24kV and 35kV applications.
Utilizing premium cold-rolled grain-oriented silicon steel and advanced winding technology, S11M transformers achieve 20-30% lower no-load losses compared to traditional S9 series models. This translates to significant long-term energy savings, reduced maintenance requirements and a 30+ year service life. Ideal for power and lighting supply in industrial plants, hospitals, commercial complexes, residential areas and rural power grids, our S11M transformers combine exceptional efficiency with robust environmental resilience.
Our S11M transformers feature an optimized stepped-lap core structure constructed from high-grade silicon steel sheets, minimizing magnetic hysteresis and eddy current losses. For a 1000kVA unit operating 24/7, this delivers over 4,000 kWh of annual energy savings, reducing your electricity expenses by approximately $400 per year. No-load currents as low as 0.6% (for 1600kVA models) further enhance efficiency during light-load conditions.
The hermetically sealed design isolates the transformer oil from external air and moisture, preventing oil oxidation and insulation degradation. This eliminates the need for regular oil changes and routine maintenance, cutting lifecycle maintenance costs by up to 70% compared to open-type transformers. The corrugated tank structure also provides natural oil expansion and contraction, eliminating the need for a separate conservator.
A specially designed helical winding configuration with reinforced insulation provides exceptional short-circuit withstand capability, fully compliant with IEC 60076-5 standards. This protects your valuable electrical equipment from damage during grid faults and minimizes costly downtime, ensuring uninterrupted power supply for critical operations.
Through innovative core clamping technology and optimized winding arrangement, S11M transformers operate at noise levels 5-10 dB lower than industry averages. This makes them ideal for installation in hospitals, schools, residential areas and other noise-sensitive locations, ensuring compliance with workplace and environmental noise regulations.
All S11M transformers utilize natural oil-air (ONAN) cooling, eliminating the need for fans or pumps. This simple, reliable cooling system reduces moving parts, minimizes maintenance requirements and ensures consistent performance even in extreme ambient temperatures ranging from -25°C to +40°C.
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 | ||||||||||||||
Selection Guide:
For residential and commercial distribution: Yyn0 connection, 4% impedance
For industrial plants with high starting current loads: Dyn11 connection, 5.5% impedance
For 20kV grid systems: Dyn11 connection, 6% impedance
S11M transformers provide stable, reliable power for heavy machinery and production lines. Their robust short-circuit resistance withstands frequent motor starts, while high efficiency reduces overall energy costs for manufacturing operations.
Critical medical equipment requires uninterrupted, clean power. Our S11M transformers deliver consistent voltage regulation, low noise operation and leak-free design, making them ideal for hospitals, clinics and diagnostic centers.
Compact dimensions and aesthetic design allow for both indoor and outdoor installation in urban areas. The fully sealed construction eliminates oil leaks, and low noise levels ensure a comfortable environment for residents and customers.
Wide voltage tolerance and reliable performance in harsh environmental conditions make S11M transformers perfect for rural electrification projects. The maintenance-free design reduces operational costs in remote areas with limited technical support.
S11M transformers are compatible with solar and wind power systems, efficiently stepping up generated power for grid connection. Their high efficiency minimizes energy losses during transmission.
Maximum ambient temperature: +40°C
Minimum ambient temperature: -25°C
Altitude: < 1000m (higher altitude models available on request)
Maximum monthly average relative humidity: 90% (at 20°C)
Installation location: Indoor or outdoor, free from fire, explosion danger, serious pollution, chemical corrosion and violent vibration
All our transformers are manufactured in accordance with IEC 60076, GB1094 and other international standards. Our production facility is ISO 9001:2015 certified, and every unit undergoes rigorous testing before shipment to ensure compliance with all performance specifications.
With over 15 years of experience in power transformer design and manufacturing, Pino Electric has established a reputation for delivering high-quality, reliable products. We produce over 10,000 transformers annually, serving customers in more than 30 countries worldwide.
We understand that every project has unique requirements. That's why we offer full customization options for voltage, capacity, connection groups and special features, with a minimum order quantity of just 1 unit. Our engineering team will work closely with you to develop a transformer that meets your exact specifications.
All S11M transformers come with a 2-year manufacturer warranty. We provide worldwide technical support, installation guidance and spare parts supply to ensure your transformer operates reliably throughout its 30+ year service life. Our dedicated customer service team is available 24/7 to address any questions or concerns.
S11 transformers use advanced core materials and optimized design, resulting in 20-30% lower no-load losses compared to S9 series. This translates to significant long-term energy savings and lower operational costs.
With proper installation and minimal maintenance, S11M transformers have a service life of over 30 years. The fully sealed design prevents oil contamination and insulation degradation, extending the transformer's lifespan.
Yes, S11M transformers are designed for both indoor and outdoor installation. The fully sealed construction provides protection against dust, moisture and other environmental factors.
Yes, we offer 20kV S11M transformers with optional transfer switches for easy conversion between 10kV and 20kV input voltages. Contact our engineering team for custom solutions.
Standard models typically ship within 7-15 business days. Custom orders may require 20-30 business days depending on specifications.
Ready to reduce your energy costs with high-efficiency S11M oil-immersed transformers? Fill out the form below with your project requirements, and our technical team will provide a detailed, no-obligation quote within 24 hours.
