ABB CM driefasen-bewakingsrelais, 2 wisselcontacten, 300-500 V AC, 0,1-30 s 1SVR730794R3300

Industrial electricians and panel builders use the ABB CM three-phase monitoring relay to protect motors and equipment from phase loss, phase sequence errors, and voltage deviations. It monitors three-phase supplies from 300 to 500 V AC and provides two changeover contacts for control or alarm circuits.

Key specifications

• Monitoring function: phase sequence, phase loss, over/undervoltage
• Supply voltage: 3 x 300 - 500 V AC
• Output contacts: 2 changeover (C/O)
• Adjustable time delay: 0.1 - 30 s
• Mounting: DIN rail
• Terminal type: screw terminals
• Operating temperature: -20 to +60 °C
• Degree of protection: housing IP50, terminals IP20

Why choose it

The CM relay provides reliable monitoring in a compact DIN rail housing. Its adjustable delay prevents nuisance tripping during short voltage dips, and the two changeover contacts offer flexible wiring for alarms or control.

Ideal use cases

• Protecting motors from phase loss or incorrect rotation
• Monitoring supply voltage in control panels
• Triggering alarms or backup systems on voltage faults

Good to know

The relay is suitable for 50/60 Hz networks and meets IEC/EN 60255-6, UL 508, and CSA 22.2 No. 14 standards.