66kV 15MVA Power Transformer
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The SFZ-12.5-15MVA/66/33 kV is a 66 kV power transformer tailored to meet the specific needs of the Australian market and proudly supplied by GNEE. This 15 MVA (15000 kVA) transformer plays a vital role in powering solar farm projects in Australia and has a primary rated voltage of 66 kV and a secondary rated voltage of 33 kV. The transformer strictly complies with the AS 60076 standard.
| 15 MVA Transformer Specifications | |||
| Phase | 3 phase | Std. | AS 60076 |
| Power rating | 12.5/15 MVA | Fluid | Mineral Oil |
| Type | Oil Immersed with Expansion Vessel | Frequency | 50Hz |
| HV Voltage | 66000V | No. of tap position | 12 taps + nominal |
| LV Voltage | 33000Y/19052V | Load loss at rated voltage | 62000W |
| Cooling means | ONAN/ONAF | No load loss | 12000W |
| HV bushing | Porcelain(brown) | Paint Color | AS 2700 |
| LV bushing | Porcelain(brown) | Winding Material | Copper |
| Environmental condition | Outdoor | Vector Group | Dyn11 |
15 MVA power Transformer Features
Designed to withstand high ambient temperatures, with a peak threshold of 47.8°C, and suitable for use in areas with extremely high pollution levels. Its exterior is painted with C4 standard thickness paint, which effectively protects against moisture and corrosion, especially in coastal areas. The transformer features a 13-speed on-load tap changer for optimal performance and flexibility. Cooling options include ONAN (Oil Natural Air Natural) and ONAF (Oil Natural Air Forced) types. Rated power reaches 12.5 MVA (12500 kVA) with ONAN cooling and an astonishing 15 MVA (15000 kVA) with ONAF cooling.
- Designed and constructed in compliance with IEEE and CSA standards.
- Equipped with copper windings for enhanced performance and durability.
- Utilizes Oil-Natural Air-Natural (ONAN) cooling methods for efficient heat dissipation.
- Features a High Voltage Basic Insulation Level (HV BIL) of 325 kV and a Low Voltage Basic Insulation Level (LV BIL) of 95 kV.
- Operates with a Dyn1 vector group.
- Weighs approximately 22,000 kilograms (kg).
- Equipped with a five-position tap changer switch to accommodate varying voltage needs.
- Adopts a top-mount design for high-voltage connections and a side-mount design for low-voltage connections.
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