Motor Monitoring Carlo Gavazzi offers a number of powerful solutions for monitoring motors, pumps, and compressors. To monitor load on a motor, traditionally, we monitor the current. However, in some applications where it is necessary to monitor small changes in load, it is better to monitor the actual power draw of the motor since this is proportional to the actual load on the motor. Our power quality products are capable of monitoring current, power, power factor giving the user more options for load monitoring applications. In addition, you can also monitor the voltage giving protection against under voltage. With our WM3-96 power quality monitor, any of the above variables can be assigned to a digital output allowing the motor to be shut off in case of overload or under voltage. Furthermore, a storage module can be added allowing any overloads that do occur to be stored for later viewing. To monitor a group of motors, a number of WM3's or SPT-90 tranducers can be linked to a PLC using RS485 or 4-20 mA current signals.