General
Number of measuring circuits	1
Number of contacts as normally closed contact	1
Number of contacts as normally open contact	1
Number of contacts as change-over contact	1
Connection type auxiliary circuit	Screw connection
Height	78
Width	22.5
Depth	78.5
Operating voltage at AC 60 Hz	240
Supply voltage AC 50 Hz	240
Supply voltage AC 60 Hz	240
Type of electric connection	Screw connection
Voltage type (operating voltage)	AC
Voltage type of supply voltage	AC
With detachable clamps
External reset possible
Error registration possible

The thermistor motor protection relays CM-MSE and CM-MSS are used to control motors with PTC temperature sensors. The temperature sensors are built into the motor windings and directly measure the motor heating. This enables direct control and evaluation of various operating conditions. Depending on the product, ATEX approvals for use in hazardous areas are also available. ABB also offers PTC temperature sensors C011 (according to DIN 44081) that can be embedded in motor windings.