1. Types of motors monitored by SMS

Can the SMS only be installed on new motors or can it also be installed on old motors – already in the field for some years?
The SMS can be installed on new motors as well as on old motors in the field, even while they are running.

Can this motor be monitored by SMS? Here is a photo of its nameplate:

Yes, SMS can monitor this motor because:

• it is a low voltage (<1000V), 3-phase induction motor
• its shaft height is 90S (small)
  

To make sure the SMS can monitor a given motor, make sure it meets these requirements:

• 3-phases induction motor (look for “3~MOT”)
• Squirrel cage type
• Generally, all IEC or NEMA motors are suitable (on some plates, you may find the mention EN – for European Union – in place of IEC/ICE).
• Low voltage: the supply voltage is less than 1000V
• Motor shaft height (or frame) is from 90 to 400, corresponding to a rated power ranging between 0.37 and 500kW
• Motors driven with frequency inverter or direct to line.
  

The other type of electrical motors like DC (Direct Current), servomotor and rotor wound motor are not suitable.

Here are examples of motors that can be monitored by the SMS:

Does the SMS work on motors with existing problems?
During the initial learning process, OtoSense AI builds a digital model of the specific motor the box is attached to, considering this as the baseline against which any future comparison will be made. Any further degradation will yield an alert.
We can distinguish two situations at the moment of the installation:
1. There is no symptoms of a serious problem, no imminent breakdown, there may be a minor problem, but nothing that has been identified by your operator: proceed to the installation, the SMS will work normally.
2. There is an identified existing issue and the motor is not running normally: it should be repaired before you install the SMS, otherwise the SMS won’t work properly.