ABB CM-MPS.21S Three-Phase Monitoring Relay

The three-phase monitoring relays CM-MPS.x1 monitor the phase parameters phase sequence, phase failure, over- and undervoltage as well as phase unbalance.

All 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).

• Rated control measuring voltage: 3x 180-280V AC
• Connection technology: Screw terminals
• Monitoring of three-phase mains for phase sequence
• TRMS measuring principle
• CM-MPS.11 and CM-MPS.21 can also be used to monitor single-phase mains
• ON-delayed or OFF-delayed tripping delay selectable
• Powered by the measuring circuit
• Precise adjustment by front-face operating controls
• 3 LEDs for the indication of operational states