ABB CM-PSS.31S Three-Phase Monitoring Relay

The three-phase monitoring relays CM-PSS.x1 monitor the phase parameters phase sequence, phase failure as well as over- and under voltage.
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 380V AC
• Connection technology: Screw terminals
• Monitoring of three-phase mains for phase sequence (can be switched off), phase failure as well as over and under voltage
• Tripping delay Tv can be adjusted or switched off by means of a logarithmic scale (0s; 0.1-30s)
• Powered by the measuring circuit
• Precise adjustment by front-face operating controls
• Housing material for highest fire protection classification UL 94V-0
• 3 LEDs for the indication of operational states