Siemens SIMOTICS HV M, Operating Instructions Manual

Page: 79 / 136

See also
Interlock circuit for anti-condensation heating (Page 25)
8.3 Switching on the machine
1. If at all possible, run the machine without load and check that it is running smoothly.
2. If it runs perfectly, connect a load.
NOTICE
Thermal overload of motors connected directly to the line supply
In addition to the load torque, the ramp-up (accelerating) time is essentially influenced by
the moment of inertia to be accelerated. While ramping up when connected to the line
supply, the inrush (starting) current is a multiple of the rated current. This can result in
thermal overload. This can damage the motor.
As a consequence, when ramping up, observe the following:
● Monitor the ramp-up time and number of consecutive starts.
● Comply with the limit values and/or ramp-up conditions specified in the catalog or the
order documentation.
3. If this is possible using the available measuring equipment, check the bearing and stator
winding temperatures.
8.4 Regreasing roller bearings
Refer to the regreasing instructions for the roller bearings on the lubricant plate.
See also
Transport and storage (Page 27)
8.5 Switching off
Do not immediately switch off the separately-driven (external) fan after switching off the
machine. First wait for the machine to cool down. This will prevent the accumulation of residual
heat.
8.6 Switching off
● Switch off the water-cooling system after switching off the machine. Condensation can form
inside the machine if cooling water flows while the machine is at a standstill.
● Only switch off the water cooling system once the machine has cooled down. This will
prevent the accumulation of residual heat.
Operation
8.3 Switching on the machine
SIMOTICS HV M 1RN76308PR900CG0-Z
Operating Instructions 07/2018
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