28 - PVD 3661 MGV_ commisionning manual_March 2012.docx
3.7.2.
Motor temperature can also be continuously measured by the drive using a KTY 84-130 thermal sensor built in
to the stator winding. KTY sensors are semiconductor sensors that change their resistance according to an
approximately linear characteristic. The required temperature limits for alarm and tripping can be set in the
drive.
Temperature measurement with KTY sensors:
The graph below shows the KTY sensor resistance vs temperature, for a current of 2 mA:
Warning
: KTY sensor is sensitive to electrostatic discharge. So, always wear an antistatic
wrist strap during KTY handling.
Warning
: KTY sensor is polarized. Do not invert the wires.
Warning
: KTY sensor is sensitive. Do not check it with an Ohmmeter or any measuring or
testing device.
3.8. Power electrical connection
3.8.1.
Wires sizes
In every country, you must respect all the local electrical installation regulations and
standards.
