A new family of electronic monitoring relays is designed for single- and three-phase applications. The 22.5-mm wide, DIN-rail mountable modules can be used for monitoring currents and voltages in several applications. The current monitoring relays are designed for monitoring AC and DC currents ranging from 0 to 100 mA, 0 to 1 A, and 0 to10 A. The voltage monitoring relays are available for monitoring single-phase AC and DC voltages ranging from 0 to 30, 0 to 60, and 0 to 500 V. The current and voltage monitoring relays are available in two versions. The SL version has one function, either undercurrent or undervoltage, with a PDT (single-pole double throw) for signal output. The multifunctional FL version provides the user the flexibility of monitoring undercurrent, overcurrent, and window function, or undervoltage, overvoltage, and window function featuring PDT relays (single-pole double throw) for signal output. Operational conditions of the monitoring relays are displayed via LEDs for supply power transformer voltage, relay status, fault type, and delay times.