Xiamen Winley Electric Co.,Ltd
| Enclosure Rating | NEMA4X |
| Primary Voltage | 11kV Delta |
| Supply Ability | 5–10 Units / Month |
| Cooling Class | KNAN/KNAF; Self-Cooled/Fan-Cooled |
| Payment Terms | T/T |
| Secondary Voltage | 11kVY/6.351kV Grounded Wye |
| Frequency | 50Hz |
| Tank Material | 304 Stainless Steel |
| Packaging Details | Plywood case |
| Rated Capacity | 26MVA KNAN / 34MVA KNAF |
| Vector Group | Dyn1 |
| Delivery Time | 10–12 Weeks |
| Brand Name | WINLEY |
| Certification | CE, ISO |
| Place of Origin | CHINA |
| Model Number | S-34000/11 |
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Product Specification
| Enclosure Rating | NEMA4X | Primary Voltage | 11kV Delta |
| Supply Ability | 5–10 Units / Month | Cooling Class | KNAN/KNAF; Self-Cooled/Fan-Cooled |
| Payment Terms | T/T | Secondary Voltage | 11kVY/6.351kV Grounded Wye |
| Frequency | 50Hz | Tank Material | 304 Stainless Steel |
| Packaging Details | Plywood case | Rated Capacity | 26MVA KNAN / 34MVA KNAF |
| Vector Group | Dyn1 | Delivery Time | 10–12 Weeks |
| Brand Name | WINLEY | Certification | CE, ISO |
| Place of Origin | CHINA | Model Number | S-34000/11 |
| High Light | 34MVA substation transformer 11KV stainless steel ，11KV power transformer NEMA 4X tank ，ANSI IEEE standard substation transformer 34MVA | ||
Winley provides this 34MVA substation transformer for large 11kV systems that require a Delta primary and an 11kVY/6.351kV grounded-wye secondary. It provides 26MVA under natural cooling and reaches 34MVA when forced-air cooling is operating, giving the system additional transformer capacity when load demand increases.
For outdoor substations, the transformer is rated for operation from -40°C to +40°C. The 304 stainless steel tank and structural components help address corrosion exposure during long-term outdoor service, while the NEMA4X wiring compartment protects cable connections and control wiring from rain and moisture. Weatherproof, UV-resistant epoxy coating adds protection against prolonged sun and weather exposure.
| Specification | Data | Specification | Data |
|---|---|---|---|
| Transformer Type | Conservator-Type Substation Power Transformer | Model | S-34000/11 |
| Phase | Three Phase | Vector Group | Dyn1 |
| Capacity | 26MVA KNAN / 34MVA KNAF | Frequency | 50Hz |
| Primary Voltage | 11kV Delta | Secondary Voltage | 11kVY/6.351kV Grounded Wye |
| Primary Voltage Class | 15kV Class | Secondary Voltage Class | 15kV Class |
| Primary BIL | 95kV | Secondary BIL | 95kV |
| Temperature Rise | 55/65°C | Insulation Rating | Class A |
| Winding Material | Copper | Core Material | Grain-Oriented Silicon Steel |
| Specification | Data | Specification | Data |
|---|---|---|---|
| Cooling | KNAN/KNAF | Forced-Air Cooling | Included |
| Insulating Fluid | Biodegradable Vegetable Natural Ester, Non-PCB | Dimensions | 196in * 149in * 169in |
| Total Filled Weight | 94,800lb | Ambient Range | -40°C to +40°C |
| Elevation | 1000m | Tank Material | 304 Stainless Steel |
| Base Material | 304 Stainless Steel | Wiring Compartment | NEMA4X, 304 Stainless Steel |
| Test Item | Unit C1 | Unit C2 |
|---|---|---|
| No-Load Loss | 17472W | 20863W |
| No-Load Current | 0.11% | 0.10% |
| Load Loss at 85°C | 132012W | 131223W |
| Short-Circuit Impedance | 5.70% | 5.69% |
| Induced Voltage Withstand | Passed | Passed |
| Separate Source Withstand | Passed | Passed |
| Pressure Integrity | 0.015MPa for 12h, no leakage | 0.015MPa for 12h, no leakage |
11kV Delta-to-Grounded-Wye Configuration
The 11kV Delta primary feeds an 11kVY/6.351kV grounded-wye secondary with a neutral connection, providing the required secondary arrangement for 11kV systems that need a grounded neutral.
26MVA KNAN / 34MVA KNAF Cooling
The transformer provides 26MVA under natural cooling and increases available capacity to 34MVA when forced-air cooling is operating, allowing higher transformer loading when system demand increases.
304 Stainless Steel Construction for Outdoor Corrosion Exposure
The tank and base use 304 stainless steel to address long-term exposure to moisture and corrosive outdoor conditions, while weatherproof and UV-resistant epoxy coating adds protection against prolonged sun and weather exposure.
NEMA4X Stainless Steel Wiring Compartment
The NEMA4X stainless steel wiring compartment protects cable terminations and control wiring from rain, moisture and outdoor weather exposure.
-40°C to +40°C Outdoor Operating Range
The confirmed operating range supports substations exposed to severe winter temperatures, allowing the transformer to be specified for cold outdoor installation conditions.
Biodegradable High-Fire-Point Natural Ester Fluid
Biodegradable, non-PCB natural ester insulating fluid addresses projects that specify high-fire-point insulating media together with environmental requirements for transformer fluid selection.
Remote Monitoring and Protection Signals
Oil level, temperature, pressure and gas-relay functions provide remote alarm or trip signals that can be connected to the central control system, allowing key transformer operating conditions to be monitored away from the unit.
NEMA H-Spade Cable Terminations
HV and LV NEMA H-Spade terminals use throat-enclosed top cable entry, providing a defined connection arrangement for the incoming and outgoing power cables.
Auxiliary Control Panel with Terminal Block
The dedicated auxiliary control panel brings monitoring, alarm and control wiring to terminal blocks, providing a clear interface for connection to the site's control system.
Pressure Relief and Gas Protection
A pressure-relief valve, pressure/vacuum monitoring and gas/Buchholz protection provide dedicated alarm, trip and pressure-relief functions for abnormal internal conditions.
HV and LV Space Heaters
Space heaters installed in the primary and secondary cable-termination areas help address condensation inside electrical connection compartments during cold or humid conditions.
| Specification | Available Options |
|---|---|
| High Voltage (kV) | 4.16 / 12.47 / 13.2 / 13.8 / 24.94 / 34.5 or others |
| Low Voltage (V) | 208/120 / 480/277 / 600 / 12,470 / 13,200 / 13,800 or others |
| Connection Symbol | Dyn1 / Ynyn0 / Dyn11 / Dd0 / Ynd11 or others |
| Short-Circuit Impedance (%) | 2.7 / 3.1 / 4.35 / 5.75 / 6.0 |
| Rated Capacity (kVA) | No-Load Loss (W) | On-Load Loss (W) | Dimensions W * H * D (mm) | Weight (kg) |
|---|---|---|---|---|
| 800 | 980 | 9,350 | 1,060 * 1,500 * 1,780 | 2,050 |
| 1,000 | 1,160 | 11,500 | 1,085 * 1,570 * 1,800 | 2,450 |
| 1,250 | 1,380 | 13,900 | 1,160 * 1,610 * 1,890 | 2,900 |
| 1,600 | 1,660 | 16,600 | 1,190 * 1,630 * 1,950 | 3,400 |
| 2,000 | 2,030 | 18,300 | 1,260 * 1,700 * 2,090 | 4,100 |
| 2,500 | 2,450 | 19,600 | 1,150 * 2,150 * 2,250 | 4,750 |
| 3,000 | 3,240 | 26,500 | 1,900 * 2,600 * 2,150 | 6,500 |
| 5,000 | 4,500 | 27,000 | 2,500 * 2,210 * 3,180 | 9,500 |
| 7,500 | 7,200 | 32,000 | 3,660 * 3,100 * 5,100 | 13,600 |
| 10,000 | 8,500 | 35,500 | 3,830 * 2,640 * 2,216 | 15,800 |
Suitable for large industrial facilities where an 11kV substation supplies continuous process loads and the downstream system requires a grounded-wye source.
The 26/34MVA KNAN/KNAF rating supports installations where natural cooling covers one operating capacity and forced-air cooling is required when transformer loading increases.
The -40°C operating capability, stainless steel construction and NEMA4X wiring compartment address outdoor installations exposed to severe winter weather, moisture and corrosion.
5–8MVA Substation Transformers
10–15MVA Substation Transformers
20–40MVA Substation Transformers
A: Winley provides clear capacity-based lead times after technical approval: 8-10 weeks for transformers below 10 MVA, 10-12 weeks for 10-40 MVA transformers, and 18-20 weeks for 40-100 MVA transformers. We also provide a detailed production schedule and real-time manufacturing photos to help track progress.We provide a detailed production schedule and real-time manufacturing photos to help track progress.
A: We offer a flexible MOQ of just 1 unit. Complete inquiries are quoted within 1-3 days with 24/7 support. Leveraging our extensive North American experience in renewable energy, data centers and large industrial projects, we ensure highly cost-effective and reliable solutions.
A: Yes, We accept OEM and ODM. Winley provides services for substation power transformers up to 100MVA, with HV systems up to 145kV. We can customize electrical parameters, structure, fluid, protection, switches, gauges, tank and paint according to customer drawings, with the capability to integrate components from brands like Qualitrol, Eaton Cooper, and MR.
A: Yes. Winley substation transformers are engineered and manufactured in strict accordance with ANSI/IEEE, CSA, NEMA, relevant ASTM standards and IEC 60076.We bring a proven track record across the United States and Canada, supporting critical applications in industrial manufacturing, renewable energy, and power distribution across a range of capacity and voltage requirements.
A: We deliver a complete compliance package: approval drawings, datasheets, nameplate drawings, routine test reports, installation manuals and accessory manuals. We also back your project with lifetime documentation support.
A: Winley ensures quality through strict ISO 9001 process management with dedicated QC oversight. Prior to delivery, every unit undergoes comprehensive routine testing, including Winding Resistance, Turns Ratio, Polarity and Phase Relation, and No-Load Loss and Excitation Current tests. We also fully support Factory Acceptance Testing (FAT) and third-party inspections (SGS).
A: Yes. Winley Electric provides tailored, fully controllable transportation solutions for large-scale transformer projects to ensure compliant customs clearance and zero-damage delivery. We actively assist in verifying critical logistics factors, including shipping dimensions, total weight, offloading conditions, site accessibility, and lifting/rigging requirements.
A: 24 months from B/L. During the warranty period, If there are any accessory problems, just provide photos of damaged accessory, then we will provide free service. According to the number of products, we will provide easily damaged accessories for free. We can also provide technical support if you need.
Company Details
Business Type:
Manufacturer,Seller
Year Established:
2007
Total Annual:
$45M-$60M
Employee Number:
150~210
Ecer Certification：
Verified Supplier
R&D and production capabilities Winley Electric boasts a team of dozens of experienced senior engineers who are well-versed in transformer standards of different countries including ANSI, IEEE, CSA, DOE2016, NEMA and IEC60076, and who can tailor cost-effective transformer solutions ... R&D and production capabilities Winley Electric boasts a team of dozens of experienced senior engineers who are well-versed in transformer standards of different countries including ANSI, IEEE, CSA, DOE2016, NEMA and IEC60076, and who can tailor cost-effective transformer solutions ...
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