Major customers
| Category | Area | Company Name | Website Address |
| Domestic | Transmission and distribution | KEPCO | www.kepco.co.kr |
| LS Cable & System Ltd. | www.lscns.co.kr | ||
| Railway | Korea Rail Network Authority (KR) | www.kr.or.kr | |
| KORAIL | www.korail.com | ||
| Seoul Metro | www.seoulmetro.co.kr | ||
| Busan Transportation Corporation | www.humetro.busan.kr | ||
| Daegu Metropolitan Transit Corporation (DTRO) | www.dtro.or.kr | ||
| Gwangju Metropolitan Rapid Transit Corporation (GRTC) | www.gwangjusubway.co.kr | ||
| Daejeon Metropolitan Express Transit Corporation (DJET) | www.djet.co.kr | ||
| Textile | Dongjintex Co., Ltd. | www.dongjintex.com | |
| Youngone Corporation | www.youngone.co.kr | ||
| PuCheon Corporation | www.pucheon.co.kr | ||
| Saechang Commercial Co., Ltd. | www.saechang.co.kr | ||
| Starflex | www.star-flex.com | ||
| Organization | Korea International Trade Association (KITA) | www.kita.net | |
| Public Procurement Service (PPS) | www.pps.go.kr | ||
| Korea Trade-Investment Promotion Agency (KOTRA) | www.kotra.or.kr | ||
| Overseas | Transmission and distribution | Power Grid Corporation of India Ltd. (POWERGRID) | www.powergridindia.com |
| Taiwan Power Company (TPC) | www.taipower.com | ||
| Formosa Plastics Group | www.fpgmuseum.com.tw | ||
| Distribution | Tokyo Electric Power Company Holdings (TEPCO) | www.tepco.co.jp | |
| Nasu Denki-Tekko Co., Ltd. | www.nasudenki.co.jp |
