Monitoring applications: Temperature
Supply voltage: 110 to 130 V ac, 220 to 240 V ac
Contact arrangement: 2 pole changeover switch
Electrical phases: 1
Delay time: Less than 100 ms
Temperature sensitivity: Overtemperature, winding temperature
Series: CM-MSS

Some products also have ATEX approval for use in hazardous areas. CM-MSS thermistor motor protection relays are designed for heavy starting, increased switching frequency, high ambient temperature, insufficient cooling, interruption, and unbalance. The CM series of thermistor motor protection relays is used to control motors with PTC temperature sensors. The PTC temperature sensors are integrated into the motor windings and measure the heating of the motor. This allows direct control and evaluation of the following operating conditions:

Main applications include:

• Dynamic broken wire detection
• Wide control voltage range of 24 to 240 V ac/dc
• Short circuit monitoring of the sensor circuit
• Non-volatile fault storage
• Remote reset
• Screw connection technology or Easy Connect technology available
• Single sensor input version with wire break detection.