# Hyosung Heavy Industries

> Hyosung Heavy Industries is a premier global power equipment manufacturer specializing in 765 kV ultra-high-voltage power transformers, 800 kV GIS, and grid-scale STATCOM systems.

> Headquarters: Seoul, South Korea - Warranty: 3 years - Sample models below: 3 (total catalog models: 3)

**Canonical:** https://voltformer.com/brand/hyosung-heavy-industries - markdown: https://voltformer.com/brand/hyosung-heavy-industries.md

## Overview

Hyosung Heavy Industries is a premier global power equipment manufacturer specializing in 765 kV ultra-high-voltage power transformers, 800 kV GIS, and grid-scale STATCOM systems. Request a formal factory quotation through Voltformer. Verify applicable standards, guaranteed ratings and declarations of conformity against the exact offered-model documentation and project jurisdiction. The IEC/EN 50708 series and EU Regulations 548/2014 and 2019/1783 apply only where the transformer and market fall within their legal scope.

## Official sources

- https://www.hyosungheavyindustries.com/

- **Last reviewed:** 2026-09-13

## Sample Models

- [VF-HYO-UHV-334MVA-765 - Hyosung Heavy Industries 334 MVA 441.7/199.2 kV UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV)](https://voltformer.com/product/hyosung-334-mva-765-kv-single-phase-uhv-autotransformer.md)
- [hyosung-gis-145kv - Hyosung 145 kV Gas-Insulated Switchgear GIS](https://voltformer.com/switchgear/hyosung-gis-145kv.md)
- [hyosung-gis-170kv - Hyosung 170 kV Gas-Insulated Switchgear GIS](https://voltformer.com/switchgear/hyosung-170-kv-gas-insulated-switchgear-gis.md)

## RFQ

Use the family-specific search/get tools in [the tool reference](https://voltformer.com/tool-reference.md) to choose an exact SKU or ID. RFQ submission requires authentication, a complete draft and explicit user confirmation; unknown project inputs must not be invented.