Siemens SIMOTICS TN 1LL8, Operating & Installation Instructions Manual

Page: 86 / 148

7.6 Set values for monitoring the winding temperature
Prior to commissioning
Before running the machine for the first time, set the temperature value for shutdown on the
monitoring device.
Table 7-3 Set values for monitoring the winding temperatures during commissioning
Set value Temperature
Shutdown 145 °C
Normal operation
Measure the normal operating temperature T
operation
at the installation site in °C. Set the values
for shutdown and warning according to the operating temperature T
operation
. The set values
depend on the design of the insulation system or the temperature class of the machine. The
data can be found on the rating plate.
Table 7-4 Set values for monitoring the winding temperatures in normal operation
Set value Insulation class 155(F) Insulation class 180(H)
Warning T
op
+ 10 K ≤ 145 °C T
op
+ 10 K ≤ 170 °C
Shutdown T
op
+ 15 K ≤ 155 °C T
op
+ 15 K ≤ 180 °C
7.7 Test run
After installation or inspection, carry out a test run:
1. Start up the machine without a load. To do this, close the circuit breaker and do not switch
off prematurely. Check whether it is running smoothly.
Switching the machine off again while it is starting up and still running at slow speed should
be kept to a bare minimum, for example for checking the direction of rotation or for checking
in general.
Allow the machine to run down before switching it on again.
2. If the machine is running smoothly and evenly, switch on the cooling equipment. Continue
to observe the machine for a while in no-load operation.
Start-up
7.6 Set values for monitoring the winding temperature
SIMOTICS TN Series N-compact 1LL8
86
Operating Instructions 11/2018