The reliable and continuous monitoring of three-phase networks guarantees trouble-free and economic operation of machines and installations. The most multifunctional three-phase monitoring relays in the electronic relays and controls assortment are ABB CM-MPS/N monitoring relays for rated voltage levels up to 820 V AC and 400 Hz. Additionally, a variety of economic and cost-efficient three-phase monitoring relays are offered in this range with specialized functionality. Most devices are available with two different terminal versions. You can choose between the proven screw connection technology (double-chamber cage connection terminals) and the completely tool-free Easy Connect Technology (push-in terminals). Main benefits include Safe and reliable monitoring of all important parameters in your three-phase network; Easy Connect Technology widhstands highest vibrations & Easy to adjust via front face potentiometer. Main features include Over-/undervoltage monitoring; Phase failure detection; Phase unbalance monitoring; Phase sequence monitoring; TRMS measuring principle & Easy Connect Technology with push-in terminals.