Thailand 69kV Substation Transformer Project
Jul 16, 2024
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Today, we are pleased to present to you a case study of GNEE Transformer's 69 kV Substation Transformer Project. Our Thai client required a step-down transformer for their substation to be connected to the hydroelectric grid.
Southeast Thailand has a diverse climate with winter temperatures as low as -40 degrees Celsius. Therefore, the transformer must operate seamlessly under these local weather conditions. The end user also had stringent requirements for the transformer's monitoring and protection system.
69 kV Transformer Specifications
| Phase Number | 3 Phase |
| Rated Capacity | 10/13.3MVA |
| Rated Frequency | 60 Hz |
| Primary Voltage | 69 kV |
| Secondary Voltage | 4.16 kV |
| Connection Symbol | YNd1 |
| Winding Material | Copper |
| Temperature Rise | ONAN 65℃/ONAF 65℃ |
| Load Capability at ambient temperature | 13.5/16.5MVA |
| Service Conditions | Outdoor |
| Altitude | 1000m |
| HV Insulation Level | 350/140 kV |
| LV Insulation Level | 60/27 kV |
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