ABB CM-MSS 1SVR430720R0400

ABB CM-MSS Thermistor Motor Protection Relay Description The ABB CM-MSS is a high-performance thermistor motor protection relay designed for monitoring PTC temperature sensors. It reliably prevents thermal overloading of motors by tripping when the nominal response temperature is exceeded. This unit features a wide and versatile supply voltage range from 24 to 240V AC/DC, making it suitable for a vast array of industrial applications worldwide. Its compact design allows for easy DIN-rail installation in control cabinets. Specifications Manufacturer: ABB Type: CM-MSS Order Code: 1SVR430720R0400 Supply Voltage: 24-240V AC/DC (15-400Hz) Output Contacts: 1 NO / 1 NC Rated Switching Current (AC15): 3A at 230V Rated Switching Current (DC13): 2A at 24V Indicators: LEDs for supply voltage (U) and fault (F) Mounting: DIN Rail Label Info Ithe: 4A Ui: 250V Uimp: 4kV ATEX Certification: PTB 02 ATEX 3080, II (2) G D Application Ideal for protecting motors in conveyors, pumps, fans, and compressors, especially in environments requiring ATEX-certified components such as the chemical, oil and gas, or food processing industries. Country of Origin Made in Germany. CO2 Impact Choosing this pre-owned component over a new one saves approximately 4.8 kg of CO2 emissions, a significant contribution to sustainable industrial practices. Availability This item is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ Question?Can the CM-MSS distinguish between a short-circuit and an open-circuit in the thermistor sensor loop? Answer:Yes, the CM-MSS is designed to detect both conditions. A flashing red ‘F’ LED indicates a short-circuit, while a permanently lit red ‘F’ LED after a fault indicates an open-circuit or over-temperature condition. Question?Is this relay suitable for use in explosive atmospheres, and what are its limitations? Answer:Yes, it has an ATEX certification (PTB 02 ATEX 3080) for category II (2) G D, making it suitable for zones with gas (G) and dust (D) explosion hazards. However, it must be installed according to the specific ATEX directives and used with certified PTC sensors. Question?What is the function of the ‘Reset/Test’ button and can the reset be automated? Answer:The front-face button allows for a manual reset after a fault has been cleared and also for testing the relay’s function. For automated or remote reset, you can connect a normally open push button across terminals T1 and T2. profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. Friday, March 13, 2026