- Low cost and high flexibility - Three phase Over or Under Voltage - Monitors phase failure & symmetry - Covers 63 to 690 VAC - Programmable scales - Programmable relay functions (NE/ND) - Microprocessor based - Optional Configuration by PC The SELCO G-Line relays are mainly intended for use in land-based applications. The SELCO G-Line relays provide an efficient solution for applications where flexibility and cost of purchase are the main issues. Despite a low purchase price, SELCO G-Line relays provide high quality, proper measuring techniques and a vast number of programmable options.