Elprom Heavy Industries JSC
European manufacturer of on-load tap changers (resistor-type vacuum and oil-break OLTCs) and motor drive units for power transformers up to 400 kV.
Product categories
Tap changers (OLTC / DETC)
Related components
Company record
| Company | Elprom Heavy Industries JSC |
|---|---|
| Role | MANUFACTURER |
| Location | Sofia, Sofia-City, Bulgaria |
| Accessory categories | Tap changers (OLTC / DETC) |
| Technology subtypes | Vacuum-type, Oil-type, RS series motor drive |
| Voltage class & evidence | 245 kV (RS series in-tank on-load tap changers) |
| Rated through-current | 1,200 A |
| Mounting configuration | In-tank |
| Technical standards | IEC 60214-1, ISO 9001 |
| Founded | 1949 |
| Primary evidence citation | Elprom Heavy Industries technical documentation |
| Source tier | TIER A |
| Provenance | Verified · Source: official website · checked 13 Sept 2026 |
Directory entries are informational supplier listings and do not imply verification, endorsement or commercial affiliation. Verification reflects a website check on the date recorded; always carry out your own due diligence before a commercial decision.
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