Setpoint Values For Monitoring The Bearing Temperature; Switching On - Siemens SIMOTICS XP 1MB 1 Series Operating Instructions Manual

7.2

Setpoint values for monitoring the bearing temperature

Prior to commissioning
If the machine is equipped with bearing thermometers, set the temperature value for
disconnection on the monitoring equipment before the first machine run.
Table 7-1
Set value
Alarm
Shutting down
Normal operation
Determine the maximum operating temperature of the bearings T
temperature, bearing load and influences of the plant on the motor in °C. Set the values for
shutdown and warning corresponding to the operating temperature T
Table 7-2
Set value
Alarm
Shutting down
7.3

Switching on

Measures for start-up
After installation or inspections, the following measures are recommended for normal start-up
of the machines:
• Start the machine without a load. To do this, close the circuit breaker and do not switch off
prematurely. Switching the machine off again while it is starting and still running at slow
speed should only be done to the extent necessary, for example for checking the direction of
rotation or for checking in general. Allow the machine to run down before switching it on
again.
• Check mechanical operation for noise or vibration at the bearings or end shields.
• If the machine is not running smoothly or is emitting abnormal noises, switch it off, and
determine the cause of the fault as it runs down.
• If mechanical operation improves immediately after the machine is switched off, then the
cause is magnetic or electrical, e.g. voltage imbalance, magnetic imbalance. If mechanical
operation does not improve immediately after switching the machine off, then the cause is
mechanical, e.g. an imbalance in the electrical machines or in the driven machine,
inadequate alignment of the machine set, operation of the machine with the system
resonating (system = machine + base frame + foundations etc.).
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 11/2023, A5E52779900A
Set values for monitoring the bearing temperatures before commissioning
Set values for monitoring the bearing temperatures
Commissioning
7.3 Switching on
Temperature
115 °C
120 °C
taking into account the
operation
.
op
Temperature
T + 5 K ≤ 115 °C
operation
T + 10 K ≤ 120 °C
operation
99