Heavy duty starting Increased switching frequency High ambient temperature Insufficient cooling Break operation Unbalance
The CM range of thermistor motor protection relays are used to control motors equipped with PTC temperature sensors. The PTC temperature sensors are incorporated in the motor windings to measure the motor heating. This enables direct control and evaluation of the following operating conditions:
Main features include: Dynamic interrupted wire detection Wide control supply voltage range for this series 24-240 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 Wire Break Detection
Approvals
Some products also have the ATEX approval for the use in hazardous areas.
Attribute
Value
Monitoring Application
Temperature
Contact Configuration
DPDT
Mounting Type
DIN Rail
Time Delay
<100ms
Temperature Sensitivity
Overtemperature, Winding Temperature
Series
CM-MSS
Hazardous Area Certification
ATEX
Dimensions
103.7 x 22.5 x 85.6mm
Current Range
Maximum of 3.7mA
Minimum Operating Temperature
-25°C
Number of Poles
1
Special Features
Fail-Safe, Inbuilt PTC Sensor, Insufficient Cooling Protection, Manual & Automatic Reset, Non-Volatile Fault Storage, One Measuring Circuit, Over Heating Protection, Over Load Protection, Remote Reset, Short-Circuit Monitoring of the Sensor Circuit
