Parameterizing motor data
Operation manual POSIDYN® SDS 5000
ID 442289.06
WE
KEEP
THINGS
MOVING
41
5
5.6
Parameterize motor temperature sensor evaluation
Connect the motor temperature sensor at terminal X2.
Motor temperature sensor connection
Motor windings are monitored thermally using the motor temperature sensors such as PTC thermistors, KTY
temperature sensors or Pt temperature sensors.
PTC thermistors are thermistors whose resistance changes significantly with the temperature. When a PTC
reaches its defined nominal response temperature, the resistance increases dramatically, by twice or more
the original resistance to several kOhms. As PTC triplets are used, one thermistor monitors each phase of the
motor winding. With 3 thermistors, all 3 phases are monitored which brings about effective motor protection.
On the other hand, KTY or Pt temperature sensors are temperature sensors with characteristic resistance
curves that follow the temperature linearly. They therefore allow for analog measurements of motor
temperatures. However, the measurements are limited to one phase of the motor winding, which also restricts
motor protection considerably compared with PTC triplets.
In the
B38 Motor temperature sensor
parameter, set whether you will evaluate a PTC triplet, a KTY 84-1xx or
a Pt1000.
B38
=
0:PTC
B38
=
1:KTY 84-1xx
B38
=
2:Pt1000
In
B39 maximum motor temperature
, set the maximum permitted temperature of the motor. If this is reached,
the
41:TempMotorTMP
fault is triggered.
The motor temperature measured by the KTY or Pt1000 is displayed in
E12 Motor temperature
.
Information
Note that evaluation of the temperature sensors is always active. If operation without temperature
sensor is permitted, the connections must be bridged on X2. Otherwise a fault will be triggered
when the device is switched on.
Information
Note that the evaluation of a Pt1000 is only possible from firmware V 5.6-S. Before using a Pt or
KTY sensor, note that motor protection is not ensured to the same extent as when monitoring with
PTC triplet.
Summary of Contents for POSIDYN SDS 5000
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