1. alfanar Group
2. Bharat Heavy Electricals Limited
3. CEEG Transformer Co. Ltd.
4. DAIHEN Corporation
5. Eaton Corporation PLC
6. Elsewedy Electric
7. Fuji Electric Co. Ltd.
8. HD HYUNDAI ELECTRIC CO. LTD.
9. Hitachi
Ltd.
10. Hubbell Incorporated
11. Imefy Group
12. Jiangshan Scotech Electrical Co. Ltd.
13. LS ELECTRIC Co. Ltd.
14. Marsons Limited
15. Mitsubishi Electric Corporation
16. Ningbo IRONCUBE Works International co. LTD.
17. Pearl Electric
18. PPI Pazifik Power Inc.
19. Schneider Electric SE
20. Siemens AG
21. Toshiba Corporation
22. TSTY Electric Co. Ltd.
23. Varelen Electric Co. Ltd
24. Voltamp Transformers Limited
25. YueBian Electric Co.Ltd.