ABB CM-MSS.22S Thermistor Motor Protection Relay 24V AC/DC 2 C/O 1SVR730700R0200

Prevent motor burnouts caused by overheating with the ABB CM-MSS.22S thermistor motor protection relay. This device monitors the temperature of motors equipped with PTC thermistor sensors and interrupts the control circuit when an overtemperature condition is detected. It is ideal for protecting pumps, fans, compressors, and other critical motor-driven equipment.

Who is it for

Maintenance engineers, panel builders, and machine OEMs who need reliable thermal protection for motors in industrial environments. The CM-MSS.22S is suitable for DIN rail mounting in control cabinets and offers flexible reset options for various application requirements.

Main features

• Monitors one PTC thermistor circuit for overtemperature, wire break, and short circuit
• Two change-over output contacts for control and signaling
• Selectable reset function: automatic, manual, or remote
• Non-volatile fault storage for diagnostics
• Wide operating temperature range from -25°C to +60°C
• Compact DIN rail housing with IP50 terminal protection

Specifications

• Control supply voltage: 24 V AC/DC, 50/60 Hz
• Output contacts: 2 C/O (change-over)
• Rated operational current: 3 A at 230 V AC (AC-15), 2 A at 24 V DC (DC-13)
• Power consumption: 2 W
• Mounting: DIN rail
• Degree of protection: IP20 housing, IP50 terminals
• Operating temperature: -25 to +60 °C

Tips

Pair the CM-MSS.22S with ABB's CM-MSS series accessories for remote reset and signaling. Ensure the PTC thermistor sensor is compatible with the relay's input characteristics for accurate temperature monitoring.