Established in 1984, ESI's only interest is power protection and service of this equipment.  We are actively engaged with the major power utilities, engineering firms, large industrial companies, and commercial entities in the US and world markets.  Our expertise includes equipment in the low, medium, and high voltage classes.  To meet the needs of our customers, we follow ANSI C-37 and other specifications that may be required.  Our administrative, sales, engineering, and technical personnel are all knowledgeable in the needs and requirements of the industry.