Renewable Energy Guide
Solar PV & Wind Step-Up Transformers
Engineering specification manual for solar PV inverter step-up transformers, wind farm collector transformers, and Battery Energy Storage System (BESS) transformers. Built to IEC 60076-16 inverter duty standards with dual/quad LV windings and C5-M anti-corrosion protection.
Solar power generation introduces unique electrical and environmental stresses compared to traditional grid transformers. Solar step-up transformers (IEC 60076-16) must operate under continuous high ambient temperatures, process high-frequency inverter harmonics, withstand DC voltage bias, and endure severe daily thermal expansion cycles.
XinHuan solar transformers step up low voltage from central solar inverters (0.6kV, 0.69kV, 0.8kV, 1.1kV) directly to medium-voltage collector grids (11kV, 20kV, 33kV, 35kV) with maximum efficiency and minimum lifetime losses.
1. Solar PV Step-Up Transformer Technical Specification Table
Guaranteed performance parameters according to IEC 60076-16 at 50°C solar ambient rating. Available in Dyn11, Dy11y11 (Dual LV), or Dy11y11y11 (Quad LV) vector configurations.
| Rated Capacity (kVA) | HV Voltage (kV) | LV Voltage (V) | LV Winding Config | No-Load Loss (W) | Load Loss (W) | Impedance Uk (%) | Método de refrigeración |
|---|---|---|---|---|---|---|---|
| 1000 kVA | 11 / 20 / 33 / 35 | 600 / 690 / 800 | Single or Dual LV | 1,120 | 8,450 | 6.0 / 6.5 | ONAN / ONAF |
| 1600 kVA | 11 / 20 / 33 / 35 | 600 / 690 / 800 | Single or Dual LV | 1,580 | 12,200 | 6.5 / 7.0 | ONAN / ONAF |
| 2000 kVA | 11 / 20 / 33 / 35 | 600 / 690 / 800 | Dual LV (Dy11y11) | 1,890 | 14,800 | 7.0 / 8.0 | ONAN / ONAF |
| 2500 kVA | 11 / 20 / 33 / 35 | 690 / 800 / 1100 | Dual LV (Dy11y11) | 2,280 | 18,100 | 8.0 | ONAN / ONAF |
| 3150 kVA | 11 / 20 / 33 / 35 | 690 / 800 / 1100 | Dual LV (Dy11y11) | 2,760 | 21,900 | 8.0 / 9.0 | ONAN / ONAF |
| 4000 kVA | 11 / 20 / 33 / 35 | 800 / 1100 | Quad LV (Dy11y11y11) | 3,450 | 27,200 | 9.0 / 10.0 | ONAN / ONAF |
| 5000 kVA | 11 / 20 / 33 / 35 | 800 / 1100 | Quad LV (Dy11y11y11) | 4,180 | 33,500 | 10.0 | ONAN / ONAF |
| 6300 kVA | 11 / 20 / 33 / 35 | 800 / 1100 | Quad LV (Dy11y11y11) | 5,120 | 41,000 | 10.0 / 12.0 | ONAN / ONAF |
2. Dual & Quad LV Winding Isolation (Inverter Duty)
Modern solar farms utilize multiple high-capacity central inverters connected to a single transformer to lower balance-of-plant (BOP) balance sheet costs.
Galvanic Isolation Between Inverters
XinHuan solar transformers feature split low-voltage windings (Dy11y11 vector group). Each LV winding is galvanically isolated from the other, preventing circulating currents between separate inverter modules and eliminating harmonic interference across solar arrays.
DC Bias & Electrostatic Shielding
PV inverters can inject slight DC offset currents into transformer windings, causing magnetic core saturation. XinHuan designs feature oversized magnetic cores with reduced flux density and grounded electrostatic copper shields between HV and LV windings to divert high-frequency switching noise.
3. Harsh Outdoor Environment & C5-M Anti-Corrosion Paint System
Solar farms are predominantly constructed in desert regions with extreme UV radiation and dust storms, or coastal saline environments with aggressive salt spray.
- C5-M Heavy Marine Paint System: Zinc-rich epoxy primer, intermediate epoxy glass-flake coating, and UV-resistant polyurethane topcoat for 25-year corrosion protection in desert or coastal salt spray environments.
- High Ambient Temperature Headroom (50°C / 55°C): Standard transformers are rated for 40°C ambient. XinHuan solar transformers feature custom thermal calculation models designed for 50°C to 55°C ambient temperatures without thermal derating.
- Hermetically Sealed corrugated Oil Tank: Eliminates oil-to-air contact, preventing moisture absorption, oxidation, and oil degradation in remote un-monitored solar farm sites.
4. Integrated Solar Skid Prefabricated Package (Inverter + Transformer + RMU)
To streamline utility-scale solar farm installation, XinHuan supplies factory-assembled Solar PV Skid Substations (Containerized Power Stations):
Central PV Inverters
Pre-wired connections to 1.25MW–3.125MW central solar inverters.
IEC 60076-16 Transformer
Multi-winding step-up transformer (0.8kV -> 33kV / 35kV).
33kV Switchgear RMU
SF6 or Solid-insulated Ring Main Unit with VCB protection.
5. Frequently Asked Questions (Solar & Wind Step-Up)
Engineering Calculators
Calculate kVA load sizing or evaluate IEC loss cost lifecycle savings for your solar project.
Request Solar Spec & Quote
Multi-winding solar step-up transformers, compact PV skids, and fast 24h drawing delivery.
Get Solar Quote →— VERIFIED QUALITY & COMPLIANCE
Certified B2B Manufacturing & Laboratory Performance
Every transformer, compact substation, and switchgear unit is engineered under audited ISO quality management systems and type-tested according to IEC 60076 and ANSI C57 international standards.
ISO 9001:2015 Quality System
Certified Quality Management System covering design, coil winding, vacuum drying, oil filling, and routine testing of 10kV–35kV distribution transformers.
ISO 14001:2015 Environmental
Environmental Management System certifying low-loss eco-designed core assemblies, zero PCB insulation oil, and environmentally safe production controls.
ISO 45001:2018 Safety System
Occupational Health and Safety Management System ensuring safety containment in high-voltage testing bays and factory assembly protocols.
IEC 60076 & GB Type Tests
Complete routine and type test records (temperature rise, impulse voltage withstand, short-circuit withstand) conducted at CNAS-accredited national research institutes.
SGS Verified Manufacturer Audit
On-site factory audit certificate by SGS / Made-in-China, verifying manufacturing premises, export capacity, assembly lines, and legal qualification.
International Delivery Certificate
Verified annual supply performance and delivery certificate for overseas power grid EPC and industrial infrastructure projects (Mozambique, Nigeria, Kenya, SEA).
