1SVR730700R2200 ABB CM-MSS.23S Thermistor Motor Protection Relay 2 C/O 110–130 V AC / 220–240 V AC

Why Choose the ABB CM-MSS.23S Thermistor Motor Protection Relay?

The ABB CM-MSS.23S 1SVR730700R2200 is a compact and reliable thermistor motor protection relay designed to monitor PTC temperature sensors installed in electric motors and other temperature-sensitive equipment. As part of the ABB CM-MSS thermistor motor protection relay series, it helps protect motors against overheating, overload and insufficient cooling by continuously supervising the connected thermistor sensor circuit.

The CM-MSS.23S features one PTC sensor circuit and provides configurable automatic, manual or remote reset. This allows the reset behaviour to be selected to suit the machine or process, while the closed-circuit operating principle provides dependable supervision of the motor temperature monitoring circuit.

This model operates from a rated control supply of 110–130 V AC or 220–240 V AC and provides two changeover (SPDT) output contacts rated at up to 250 V / 4 A. Screw connection technology, a reset button and a compact 22.5 mm wide housing make the CM-MSS.23S well suited to DIN-rail installation in industrial motor-control panels.

Key Advantages

• Dedicated PTC thermistor motor protection relay for thermal monitoring.
• One sensor circuit for monitoring motor PTC temperature sensors.
• Configurable automatic, manual or remote reset.
• 110–130 V AC / 220–240 V AC control supply.
• Two changeover (SPDT) output contacts provide flexible control and signalling.
• Helps protect motors against overheating, overload and insufficient cooling.
• Overvoltage-protected supply and measuring inputs.
• Compact 22.5 mm wide design conserves DIN-rail space.

Key Features

• ABB CM-MSS.23S thermistor motor protection relay.
• Designed for monitoring PTC temperature sensors.
• 1 measuring / sensor circuit.
• 110–130 V AC / 220–240 V AC rated control supply.
• 2 c/o (SPDT) output contacts.
• Contact rating up to 250 V / 4 A.
• Automatic, manual or remote reset configurable.
• Integrated reset button.
• Closed-circuit operating principle.
• Overvoltage-protected supply and measuring inputs.
• Designed in accordance with IEC 60947-8.
• Screw connection technology with double-chamber cage terminals.
• Tool-free DIN-rail mounting and demounting.

Reliable PTC Thermistor Motor Protection

PTC thermistors embedded in motor windings respond to increasing temperature by sharply increasing their electrical resistance when their specified response temperature is reached. The ABB CM-MSS.23S monitors the connected PTC sensor circuit and changes the state of its output contacts when an overtemperature condition is detected, allowing the motor-control system to stop equipment, activate an alarm or initiate another protective action.

With two changeover contacts and selectable automatic, manual or remote reset, the CM-MSS.23S provides flexibility for industrial motor protection schemes. One output can, for example, be incorporated into the motor control circuit while the additional contact can support signalling or supervisory functions within the wider automation system.

Typical Applications

• Three-phase electric motor thermal protection.
• Pumps, fans and ventilation equipment.
• Compressors and refrigeration machinery.
• Conveyors and material handling systems.
• Industrial production and processing machinery.
• Motor control centres and electrical control panels.
• OEM machinery and industrial automation systems.