ZHONGXIN GENERAL (Sichuan Zhongxin General Electric Energy Co.,Ltd.) manufactures the S11‑M‑250/10 250 kVA three‑phase outdoor oil‑immersed distribution transformer. This unit is designed for 10 kV medium‑voltage distribution networks, stepping down voltage to rated 400 V low‑voltage output for township power grids, industrial plants, commercial complexes and renewable‑energy auxiliary power supply.
Our factory can supply Grade‑1 high‑efficiency version whose technical performance exceeds requirements of COMMISSION REGULATION (EU) No 548/2019 and Commission Regulation (EU) 2019/1783 of 1 October 2019. Both copper‑winding and aluminium‑winding configurations are available according to project budget and specification requirements.
S11‑M‑250/10 Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Power Distribution Transformer |
| Model | S11‑M‑250/10 |
| Product Code | 1205 |
| Manufacturer | Sichuan Zhongxin General Electric Energy Co.,Ltd. |
| Phases | 3‑phase |
| Rated Frequency | 50 Hz |
| Insulation level | LI AC / LI AC |
| Short‑circuit impedance | 4.09 % |
| Cooling Method | ONAN |
| Tap‑changer positions | 7 tap positions: 10750V ~ 9250V HV; LV constant 400 V |
| Lifting weight | 490 KG |
| Insulation oil weight | 158 KG |
| Total unit weight | 830 KG |
| Applicable Standards | GB1094.1.2‑2013, GB/T 6451‑2023, GB20052‑2024, GB1094.3‑2017 |
| Winding Option | Copper winding / Aluminium winding |
| Energy‑efficiency Grade | Standard; Grade‑1 exceeds EU 548/2014 & EU 2019/1783 |
Tap‑changer voltage & current rating details from unit nameplate:
Tapping position High Voltage(V) High Voltage(A) Low Voltage(V) Low Voltage(A) I 10750 — 400 — II 10500 — 400 — III 10250 — 400 — IV 10000 14.4 400 — V 9750 — 400 — VI 9500 — 400 — VII 9250 — 400 — All above nameplate data comes from actual S11‑M‑250/10 unit manufactured inside our Sichuan factory. Every unit will complete full‑set routine factory acceptance tests before shipment.
Manufacturing Process — Real‑Shot Production Gallery
Different from many competitors using generic stock photos or images of other‑capacity transformers for illustration: every photograph shown on this page is 100 % real‑shot for this exact 250 kVA S11‑M‑250/10 unit, captured at our in‑house production workshop. What you view is exactly what we manufacture and deliver.
Coil Winding & Finished Winding Components
Silicon‑Steel Core & Active‑Part Assembly
High‑Temperature Insulation Drying
Finished Product Multi‑Angle Real‑Shot Views
Finished Unit Loading & Shipment
Our Advantages Compared With Other Suppliers
- Actual‑capacity real‑shot production photos: All images on this page belong to this 250 kVA unit. No reused stock images or mis‑used photos of other‑size transformers. Buyers can verify our real manufacturing capacity visually.
- Full‑in‑house manufacturing workflow: Winding, core stacking, active‑part assembly, high‑temp drying, tank fabrication and full‑set factory testing are completed inside our Sichuan factory. Critical steps are not outsourced to third‑party workshops.
- Flexible winding material options: Both copper winding and aluminium‑winding versions can be produced as per project cost‑performance requirements; trading agents cannot provide this level of flexible customization.
- High‑efficiency for EU‑target projects: Grade‑1 energy‑efficiency units exceed COMMISSION REGULATION (EU) No 548/2014 and 2019/1783 requirements, supporting CE‑related documentation for European‑market projects.
- Comparatively fast delivery cycle: Complete tooling for S11‑M‑250/10 and stable raw‑material stock enable us to realise shorter lead‑time versus many competing factories.
- Full routine test for every single unit: Each transformer passes complete acceptance testing before leaving factory; test reports are provided as standard deliverables, not only upon special request.
- Rich overseas‑project references: We supply distribution transformers for global power‑grid, renewable‑energy and industrial projects. Browse our case‑studies page for completed project references.
Testing Standard & Test Items
Each 250 kVA S11‑M‑250/10 oil‑immersed distribution transformer will complete full‑set routine tests before shipment, complying with GB 1094 and IEC 60076 standards.
Routine Tests (performed on every finished unit):
- Winding resistance measurement
- Voltage ratio and tap‑position verification
- No‑load loss & no‑load current test
- Load loss & short‑circuit impedance measurement
- Induced over‑voltage withstand test
- Separate‑source AC withstand voltage test
Type‑test reports (available upon request):
- Temperature‑rise test
- Lightning impulse withstand test
Optional special tests (for custom‑spec projects):
- Partial‑discharge measurement
- Sound‑level / noise‑level measurement
- Short‑circuit withstand capability test
Available Options & Custom‑Configurations
- Winding material: copper (standard) / aluminium winding
- Energy‑efficiency: standard grade / Grade‑1 exceeding EU 548/2014 & EU 2019/1783
- Rated voltage: adapt HV / LV rating for different national grid requirement
- Frequency: 50 Hz standard; 60 Hz customizable
- Off‑circuit tap‑changer (standard); on‑load tap‑changer OLTC on request
- Mineral‑oil standard; silicone‑fire‑resistant oil for special‑safety‑requirement sites
- Nitrogen‑sealed tank for long‑ocean‑sea‑freight export
- Export wooden fumigated crating plus complete full‑set export‑documentation package
Related Oil‑Immersed Transformer Models
If 250 kVA capacity cannot satisfy your power‑supply requirement, please check our other finished‑distribution‑transformer product pages: 50 kVA oil‑immersed distribution transformer, 160 kVA oil‑immersed distribution transformer, 200 kVA oil‑immersed distribution transformer. For more factory updates and industry‑related articles you can visit our industry‑insights / company‑news page.
Request Quotation & Technical Datasheet
Please contact our sales team to get formal quotation, complete datasheet, factory‑test‑report arrangement and export solution for S11‑M‑250/10 250 kVA oil‑immersed transformer. Kindly tell us your grid‑voltage parameters, winding‑material preference, required energy‑efficiency grade and final destination country. Our technical sales will send you targeted offer quickly.
Contact Us for Price & Datasheet
About ZHONGXIN GENERAL Factory
Sichuan Zhongxin General Electric Energy Co.,Ltd. is a China‑based professional manufacturer focusing on oil‑immersed transformers, dry‑type transformers, MV‑HV switchgear, prefabricated‑substation and energy‑storage‑substation equipment. Located in Xinjin District, Chengdu, Sichuan Province. We hold National High‑Tech Enterprise certification. Our oil‑immersed‑transformer product range covers 30 kVA up to 63 MVA, configurable for GB and IEC international‑project standards.
View more project cases at our case‑studies archive and read company‑news via industry‑insights page.
