400 kV and above

10 manufacturers with a public page that states a transformer voltage of 400 kV or higher. The quote on each row is the sentence that was read. A DC converter rating is labeled as such.

1. Efacec Portugal
   525 kV. Shell Up to 1500 MVA and 525 kV (BIL 1675 kV) Core Up to 350 MVA and 525 kV (BIL 1675 kV) source
2. Hitachi Energy Switzerland
   1000 kV. Primary voltage: up to 1,000 kV source
3. Hyosung Heavy Industries South Korea
   765 kV. manufactures a variety of transformers with a maximum voltage of 765 kV and a maximum capacity of 1,500 MVA source
4. Jiangsu Huapeng (JSHP, Huapeng Group) China
   850 kV. transformer solutions ranging from low-voltage distribution transformers to 850 kV, 1,000 MVA power transformers source
5. Prolec GE Mexico
   800 kV. Ranging from 5 to 1200 MVA in primary voltage through 800 kV source
6. Siemens Energy Germany
   1100 kV (large power transformer). Voltage range | Up to 300 kV | Up to 1,100 kV | ± 1,100 kV source
7. TBEA Group (Changji HQ; Shenyang, Hengyang, Tianjin plants) China
   1100 kV (DC converter transformer). The industry's first ± 1100kV DC converter transformer for transmission source
8. Transformers & Rectifiers India (TARIL) India
   1200 kV. TARIL delivers high-performance power transformers up to 1200 kV and 1000 MVA source
9. Virginia Transformer Corp USA
   525 kV (core-type liquid-filled class). We offer ratings from 300 kVA up to 400 MVA/525 kV class for core-type liquid-filled transformers, from 60 MVA up to 500 MVA/500 kV for shell-type liquid-filled transformers, and 300 kVA up to 20 MVA/35 kV for dry-type transformers. source
10. Wilson Transformer Company Australia
    400 kV. customised power transformers ranging in size from 3MVA up to 550MVA 400kV at our Glen Waverley facility source

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