IMO Precision Controls has introduced a series of three-phase voltage monitoring relays that offer adjustable thresholds and tripping delay. Other functions of the new MR family include monitoring of phase sequence and phase failure, with the ability to monitor an asymmetry with adjustable threshold. The relays, which carry a fault latch and selectable supply voltage via external power modules, are also equipped with two potential-free changeover contacts. Rated output voltage is 250V ac, and the switching capacity is 750VA.