10MVA Oil Type Substation Power Transformer 23kV to 4.16kV for Industrial

Rated at 10000/11200kVA, this oil type substation power transformer steps 23kV primary power down to 4.16Y/2.4kV for outdoor industrial and utility substations. The three-phase unit uses a delta primary, grounded-wye secondary and Dyn1 vector group, with ONAN cooling, copper windings, mineral-oil insulation, and standards identified for the unit as IEEE/ANSI C57.12.00 and IEC60076.

Its 4.16kV secondary is well suited to medium-voltage plant buses and large motor-driven loads, while the off-load ±2×2.5% tap range provides voltage adjustment for system conditions. A 150kV HV BIL and 60kV LV BIL support insulation coordination for 23kV-class outdoor substation service.

   

• HV & LV Cable Terminal Boxes
  Enclosed junction boxes protecting primary (23kV) and secondary (4.16kV) connection terminals from elements and accidental contact.
• 5-Position Off-Load Tap Changer
  Manual selection switch for ±2×2.5% primary voltage trimming.
• Gas Relay (Buchholz Type)
  Detects internal gas accumulation and oil surge, featuring light gas alarm and heavy gas trip contacts.
• Pressure Relief Valve
  Automatically discharges excessive internal tank pressure, equipped with alarm/trip contacts.
• Oil Level Gauge
  Magnetic oil level indicator with alarm switch contacts to guard against oil leakage.
• Oil Temperature Gauge
  Dial thermometer measuring top-oil temperature with built-in alarm contacts.
• Pressure Vacuum Gauge
  Monitors internal sealed pressure fluctuations inside the main tank.
• Detachable Radiators with Butterfly Valves
  External cooling radiators mounted via flanged butterfly valves for rapid isolation and field maintenance.
• Lifting Lugs & Grounding Terminals
  Four heavy-duty tank lifting lugs and dedicated grounding pads for safe site rigging and grounding.
• Drain Valve with Sampling Port
  Located at the tank bottom for complete oil drainage and liquid sampling.

1. With extensive experience in North American projects, Winley Electric designs substation transformers to meet applicable ANSI/IEEE, CSA, NEMA and related standard requirements.
2. With a stable supply chain, mature production processes, Winley Electric 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.
3. Winley Electric provides complete English technical documentation, 24/7 technical response, spare parts support, and a 2-year warranty to support project installation and long-term operation.

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.