| Brand | ROCKWILL |
| Model NO. | PV Inverter Grid-Connected Transformer for Solar Systems |
| Rated frequency | 50/60Hz |
| Rated capacity | 60KVA |
| Series | SGG |
This SGG/SD series dry-type transformer is designed for photovoltaic inverter grid-connected systems, converting inverter output to grid-compatible voltage. Foil winding process with low-loss oriented silicon steel core provides high efficiency, low temperature rise, and reliable harmonic suppression.
Suitable for AC 50/60Hz circuits up to 690V, with rated input 270V and output 400V (customizable). All performance indicators comply with GB/T 1094.11-2022 dry-type transformer standard. Custom designs from 25kVA to 100kVA available.
| Rated Capacity | 60 kVA (range: 25–100 kVA) |
| Frequency | 50 / 60 Hz |
| Rated Input Voltage | AC three-phase 270V |
| Rated Output Voltage | AC three-phase 400V (customizable) |
| Max. System Voltage | ≤690 V |
| Connection Group | Dyn11 (customizable) |
| Core Material | Low-loss oriented silicon steel, full-joint structure |
| Winding Process | Foil winding |
| Insulation Class | H (180°C) |
| Temperature Rise | ≤115 K |
| Impedance Voltage | ≤4% |
| Cooling Type | Natural Air (AN) / Forced Air (AF) |
| Compliant Standard | GB/T 1094.11-2022, IEC 60076-11 |
| Certifications | CE, RoHS, ISO 9001 |
| Condition | Value |
|---|---|
| Ambient Temperature (Max.) | +40°C |
| Ambient Temperature (24h Avg.) | ≤35°C |
| Ambient Temperature (Min.) | -5°C (indoor) |
| Altitude | ≤1000 m |
| Relative Humidity (Daily Avg.) | ≤95% |
| Relative Humidity (Monthly Avg.) | ≤90% |
| Water Vapor Pressure (Daily Avg.) | ≤2.2 kPa |
| Water Vapor Pressure (Monthly Avg.) | ≤1.8 kPa |
| Pollution Degree | PD2 |
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