Page 792 - ABB_Motor _Protection_and_Control_catalogue_20221216

7/2 ABB MOTOR PROTECTION AND CONTROL

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Thermistor motor protection relays
Benefits and advantages

The thermistor motor protection relays of the CM-MSx range protect motors with
PTC sensors against high temperature. These sensors are incorporated in the motor
windings thus measuring the motor heat directly.

07

Continuous operation Reliable in harsh conditions Easy installation
By using thermistor motor protection Direct motor protection through tem- Due to the compliance with the latest
relays from ABB, the down and com- perature monitoring of the motor standards, there is no need to make
missioning time can be reduced. The winding offers 100 % motor protec- any adjustments on the device. All re-
relay is continuously monitoring the tion, even under the most difficult am- lays come with two different connec-
sensor circuit to detect short-circuit or bient conditions. The ABB thermistor tion possibilities - screw or push-in - to
interrupted i.e. wire faults, thus con- motor protection relays give you ac- make any adjustments on the installa-
tributing to maintenance and time sav- cess to worldwide markets and are ap- tion a breeze. Thanks to direct mea-
ing in case of faults. In addition, the proved by local and international stan- surement of the motor temperature,
clear error messages of the front LEDs dards for many applications such as dimensioning of the thermistor motor
makes it possible to distinguish be- industry, renewable energies, the ma- protection relay, considering the size
tween the various fault causes. rine sector and dangerous and explo- of the motor, is not necessary.
sive environments. To prove that, the
CM-MSS thermistor motor protection
relays are certified according to ATEX
Ex II (2) G and D for environments with
explosive gas or dust loads.