ABB – 1SVR430810R9300 (CM‑MSS) – Thermistor Motor Protection Relay

Main Features

• Product & Series: ABB CM‑MSS thermistor motor protection relay, single‑sensor configuration (MPN 1SVR430810R9300)  

• Supply Voltage: 24–240 V AC/DC wide-range power supply on A1‑A2 terminals  

• Sensor Interface: Monitors one PTC thermistor sensor (per motor winding); includes built-in wire-break detection on the sensor loop  

• Output Contacts: DPDT—one changeover and one normally‑open contact for control/trip signaling  

• Reset Options:

  • Test/reset button on front

  • Configurable automatic/manual/remote reset via jumper on S1‑T2 terminals  

• Indicator LEDs: Green = supply OK; Red = fault/trip indication  

• Key Protections: Detects PTC over‑temperature and sensor line short‑circuit

• Mechanical Specs:

  • DIN‑rail mount, 22.5 mm wide

  • Dimensions: ~100 × 22.5 × 78 mm

  • Power consumption ~1.1 VA (24 V DC)  

• Compliance & Use: Meets IEC 60947‑4‑1; suitable for motor overload and winding protection; optional ATEX versions available