Product Code: CM-MSS.31S

Thermistor motor protection relay with one sensor circuit for monitoring PTC temperature sensors. Features include short-circuit detection, dynamic interrupted wire detection, and non-volatile fault storage. The relay operates on a control supply voltage of 24-240 V AC/DC and has a 1 NO + 1 NC output contact rated at 250 V / 4 A. It follows the closed-circuit principle and has three LEDs for status indication. The relay also includes interrupted-wire monitoring and can be reset automatically, manually, or remotely after the failure is resolved. It is equipped with double-chamber cage connection terminals.

Brand	ABB
Connection Type	Double-chamber cage connection terminals
Contacts	1NO + 1NC
Degree of Protection	IP50 (Housing), IP20 (Terminals)
Dimensions (mm)	22.5W x 85.6H x 103.7D
Duty Time	100%
Function	Dynamic interrupted wire detection, Non-volatile fault storage, Short-circuit detection
LED Colour	U: Green, F: Red, R: Yellow
Mounting Type	DIN Rail
No. of LED	3
Operational Temperature Range (°C)	-25 to +60
Overvoltage Category	III
Pollution Degree	3
Rated Control Supply Voltage AC/DC (V)	24 - 240
Rated Current (A)	4
Rated Frequency (Hz)	15-400
Rated Impulse Withstand Voltage (kV)	4
Reference No.	1SVR730712R1400
Sensor Type	PTC Type A
Standards and Approvals	CAN/CSA C22.2 No.14, EN 50495, IEC/EN 63000, IEC/EN 60079-7, IEC/EN 60947-5-1, IEC/EN 60947-8, UL 508
Storage Temperature (°C)	-40 to +85
Terminal Type	Screw
Weight (kg)	0.128

Electrical Time Switches, Timers & Control Relays

ABB THERMISTOR MOTOR PROTECTION RELAY WITH SHORT CIRCUIT DETECTION CONTROL 24-240VAC/DC 1NO+1NC RESET AUTO, MANUALLY & REMOTELY CM-MSS.31S

Product Code: CM-MSS.31S

Technical Specifications

Documents

Products to compare: