Autotransformers
110–225kV, 63–400MVA autotransformers for transmission substations, lighter and with lower losses than two-winding units of the same rating. MEEPOWER has energized two 250MVA – 220kV autotransformers at Binh Tan 220kV substation.
110 – 225kV63 – 400MVA
Technical data
- Voltage (kV)
- 110 – 225
- Rating (MVA)
- 63 – 400
- Voltage regulation
- OLTC on MV side or HV neutral
- LV voltage (kV)
- 6.3; 6.6; 10.0; 10.5; 11.0; 15.75; 38.5
- Cooling
- ONAN; ONAF; OFAF; ONAN/ONAF/OFAF
Applications
- 220kV transmission substations
- 220kV – 110kV grid interconnection
Proven track record
8units in service at 3 sites (to end-2025)
- 250MVA × 6
- 63MVA × 2
Recent sites
- TBA 220kV Củ Chi250MVA · 2026
- TBA 220kV Quận 7250MVA · 2026
- TBA 220kV Quận 763MVA · 2026
- TBA 220kV Bình Tân250MVA · 2025
ASTA (Intertek) – short-circuit test, 250MVA 225/115/23kV- HVLAB – Institute of Energy: type tests, 250MVA – 220kV (2026)
TCVN 6306-1:2015 (IEC 60076-1) conformity – up to 250MVA, 220kV
Routine tests in VILAS 1247 accredited laboratory
