Founded in 1972, Choil Sungup Electric Co., Ltd. is a transformer specialist built on decades of focus—concentrating all human resources, capital, and technical capabilities on a single product line: industrial transformers.

We do not boast, and we are not flashy. Yet at Choil Sungup Electric, masters of technology and quality—along with powerful expertise accumulated over many years—stand ready to deliver flawless products and services.

Our specialists work tirelessly day and night to deliver customer satisfaction through world-class transformer solutions and service.

Since obtaining KS certification in 1986, we have supplied Korea Electric Power Corporation (KEPCO) and earned recognition for product reliability. We have also been certified as an INNO-BIZ (technology-innovation SME), validating our technical and quality-management capabilities.

Beyond our long-established oil-immersed power and distribution transformers, our mold-type transformers—launched in 2004—are environmentally friendly, with excellent flame retardancy and insulation, and are easy to install and maintain. They are a core product for buildings, apartments, hospitals, and research facilities where high reliability, fire safety, and low noise are essential. Our high-efficiency standard energy-consumption products, introduced in July 2012, operate safely and quietly while achieving top-tier efficiency for outstanding energy and cost savings—an economical choice amid rising electricity rates.

To meet diverse and special customer requirements, we offer optimal solutions including photovoltaic transformers, three-winding transformers, rod-type transformers, Korea Railroad Corporation single-phase transformers, and custom specialty transformers.

For more than 40 years of contribution to national electrical industry development, founder Chairman Kim Young-sung received the Order of Industrial Service Merit from the President of the Republic of Korea in 2011.

With the inauguration of our second CEO in 2011, we declared a “New Start,” converging and optimizing our legacy, present passion, and future vision. In an era of limitless competition, we aim to become your GPSP (Growth Power Solution Partner)—delivering trust and inspiration to customers while growing together through endless challenge.

With the spirit of ichigo ichie—treating each encounter and every moment of product development, production, and field service as a once-in-a-lifetime opportunity—we will cherish every engagement. Together with our customers, Choil Sungup Electric will dream big and forge a shared vision for growth.