Medium-voltage switchgear suppliers
Medium-voltage switchgear takes the utility or campus feed at 1 to 52 kV and switches it through vacuum breakers to the transformers. This hub lists 38 suppliers. 30 publish a rating of 36 kV or more, and four publish 63 kA: Powell↗, ABB↗, Schneider Electric↗ and IEM↗. Each figure links to the datasheet it came from.
| SF6-free MV | Standards and certifications | ||||||
|---|---|---|---|---|---|---|---|
| Daelim Transformer | 521 | — | — | — | IEEE C37.20.2; IEEE C37.20.3; IEC 62271-200 (MV); UL 1558; UL 891; IEC 61439 (LV) | China | 2026-11-11 |
| ABB | 40.51 | 631 | 4,0001 | Yes | — | Switzerland | 2026-11-11 |
| CG Power and Industrial Solutions | 40.51 | — | — | — | — | India | 2026-11-11 |
| CHINT | 40.52 | 252 | 1,2502 | — | IEC 62271-200 | China | 2026-11-11 |
| Ormazabal | 40.51 | 31.51 | 2,5001 | — | IEC; IEEE (ETL listed); ENA | Spain | 2026-11-11 |
| Siemens | 40.51 | 501 | 4,0001 | — | IEC 62271-200; GB3906 (NXAirS) | Germany | 2026-11-11 |
| TAMCO Switchgear | 40.51 | 501 | 3,1501 | — | IEC 62271-100/-200/-102 (VHIH) | Malaysia | 2026-11-11 |
| Vertiv | 40.52 | 402 | 2,5002 | — | UL 891 (US low-voltage switchboard option); IEC 62271 (MV); IEC 61439 (LV) | United States | 2026-11-11 |
| Crown Technical Systems | 381 | — | — | — | IEEE; NEMA; ANSI | United States | 2026-11-11 |
| Eaton | 381 | 401 | 3,0001 | — | IEEE C37.20.2; CSA C22.2 No. 31 | Ireland | 2026-11-11 |
| Federal Pacific | 382 | — | 1,2002 | — | — | United States | 2026-11-11 |
| G&W Electric | 381 | 161 | 9001 | — | IEEE C37.74; IEEE C37.60; IEEE 386; IEC 60529 | United States | 2026-11-11 |
| HD Hyundai Electric | 381 | 501 | 4,0001 | — | IEC 62271-200; ANSI/IEEE C37.20.2 | South Korea | 2026-11-11 |
| Hyosung Heavy Industries | 381 | 401 | 4,0001 | Yes | — | South Korea | 2026-11-11 |
| IEM | 381 | 632 | 4,0002 | — | ANSI/IEEE C37.20.2; C37.55 | United States | 2026-11-11 |
| JST Power Equipment | 381 | 401 | 3,0001 | Yes | — | United States | 2026-11-11 |
| LS Electric | 381 | — | — | — | — | South Korea | 2026-11-11 |
| Lucy Electric | 382 | 255 | 6302 | Yes | IEC 62271-1, -100, -102, -103, -105, -200, -206, -213; IEC 60255 | United Kingdom | 2026-11-11 |
| Myers Power Products | 381 | — | 4,0001 | — | UL 1558 and UL 891 designs available for LV assemblies | United States | 2026-11-11 |
| nVent | 381 | — | — | — | — | United Kingdom | 2026-11-11 |
| Powell Industries | 381 | 631 | 4,0001 | — | ANSI C37.20.2; C37.20.7 | United States | 2026-11-11 |
| S&C Electric | 382 | 252 | 2,0002 | Yes | — | United States | 2026-11-11 |
| Schneider Electric | 383 | 631 | 4,0001 | — | — | France | 2026-11-11 |
| W-Industries | 381 | 401 | 2,0001 | — | IEEE C37.20.2-2025; UL witness testing completed | United States | 2026-11-11 |
| alfanar | 361 | 402 | 4,0002 | — | IEC 62271-1; IEC 62271-200; IEC 62271-100 (NES-H) | Saudi Arabia | 2026-11-11 |
| Efacec | 361 | 501 | 4,0001 | — | — | Portugal | 2026-11-11 |
| Lauritz Knudsen Electrical & Automation | 361 | 501 | — | — | — | India | 2026-11-11 |
| Meidensha | 361 | 31.51 | 2,5001 | — | IEC 62271-200 | Japan | 2026-11-11 |
| Trystar | 361 | 401 | 4,0001 | — | ANSI/IEEE C37.20.3 (MV metal-enclosed); UL 891 / UL 1558 (LV) | United States | 2026-11-11 |
| WEG | 361 | 31.51 | 2,5001 | — | — | Brazil | 2026-11-11 |
| Cummins | 271 | — | — | — | UL 891 or UL 1558 (LV paralleling switchboards); IEEE C37.20.2 (MV) | United States | 2026-11-11 |
| Fuji Electric | 241 | 251 | 2,5001 | — | IEC 62271-200 (VC-V20A-1) | Japan | 2026-11-11 |
| GE Vernova | 17.52 | 402 | 4,0002 | — | IEC 62271-200 (M-Tier) | United States | 2026-11-11 |
| Mitsubishi Electric | 151 | 401 | 4,0001 | — | IEC 62271-200 (MS-E) | Japan | 2026-11-11 |
| Russelectric | 151 | — | — | — | UL 1008A; IEEE, NEMA and ANSI standards | United States | 2026-11-11 |
| COMECA | — | — | — | — | IEC 61439-1 and -2 | France | 2026-11-11 |
| Mission Critical Group | — | — | — | — | ANSI; IEEE; UL (exact standards depend on assembly); UL 891; UL 1558 (LV); IEEE C37.20.2; C37.20.7; C37.20.9 | United States | 2026-11-11 |
| Toshiba | — | — | — | — | IEC; ANSI (TTDA distribution products) | Japan | 2026-11-11 |
How to read an MV rating
How ratings are readThree numbers, three jobs
Voltage (kV) sets the insulation class and decides whether a lineup suits a 12 kV or a 36 kV campus. Busbar current (A) is how much the main bus carries continuously. Short-circuit rating (kA) is what the assembly withstands, or the breaker interrupts, when a fault hits. They are different duties with different test durations, and they rarely peak in the same model.
Family maxima are not one product
The table shows the highest figure each supplier publishes across the families we researched. ABB’s UniGear ZS1 runs to 24 kV and 4,000 A, but its 63 kA rating holds only up to 17.5 kV; its 40.5 kV ZS3.2 is rated 31.5 kA↗. Open a supplier page and read the rating scope before you put two numbers side by side.
Insulation and SF6
Air-insulated metal-clad and metal-enclosed gear is common across the list. Gas-insulated designs shrink the footprint, and the SF6-free options use dry air or a CO2 mixture instead of sulfur hexafluoride.
Need the low-voltage side of the same room? See low-voltage switchgear suppliers, or the US-headquartered makers when UL and ANSI listing is the first filter.