ABB CM-MSS.41S Thermistor Motor Protection Relay, 24-240 V AC/DC, 0.5-10 A, 1 C/O 1SVR730712R1200

Monitor 3-phase motors with precision using the ABB CM-MSS.41S thermistor motor protection relay. It detects overload, underload, phase loss, unbalance, sequence errors, and locked rotor conditions, safeguarding your equipment.

Overview

The CM-MSS.41S operates on a wide auxiliary supply of 24-240 V AC/DC and measures motor currents from 0.5 A to 10 A. Its true RMS measuring principle ensures accurate readings even with distorted waveforms. The relay offers adjustable trip and start-up delays, and a single change-over output contact for control circuits.

What stands out

• Comprehensive protection: overload, underload, phase loss, unbalance, sequence, locked rotor
• Wide supply voltage range: 24-240 V AC/DC
• Adjustable trip class 10E and phase unbalance threshold (5-20%)
• Flexible reset: automatic, manual, or remote
• DIN rail mounting for quick installation

Technical details

• Auxiliary supply voltage: 24-240 V AC/DC
• Current measuring range: 0.5-10 A
• Output: 1 C/O contact, 6 A (AC-12), 3 A (AC-15)
• Power consumption: 2 W / 2 VA
• Operating temperature: -25 to +60 °C
• Degree of protection: IP50 housing, IP20 terminals
• Terminal type: screw
• Standards: IEC/EN 60947-8, UL 508, CSA 22.2 No. 14

Our verdict

A reliable motor protection relay with a broad supply range and comprehensive monitoring functions, ideal for industrial motor control applications.