System-Inherent Frequencies; Electromagnetic Compatibility - Siemens SIMOTICS XP Operating Instructions Manual

Machine damage due to excessively high speeds
Excessive rotational speed can lead to serious damage to the machine. This can result in
death, serious injury or material damage.
• Avoid operation above the permissible speed by using the appropriate control function.
• Observe the speeds stamped on the rating plate and in the Electrical Data.
4.12

System-inherent frequencies

Excessively high vibration levels and system resonances can damage the machine set.
• Configure and match the system consisting of the foundation and machine set in such a
way that no system resonances can arise and result in the permissible vibration levels
being exceeded.
• The vibration values according to DIN ISO 10816-3 must not be exceeded.
4.13

Electromagnetic compatibility

Note
If the torque levels are very unequal (e.g. when a reciprocating compressor is being driven), a
non-sinusoidal machine current will be induced whose harmonics can have an impermissible
effect on the supply system and cause impermissible interference emissions as a result.
Note
Converter
• If operated with a frequency converter, the emitted interference varies in strength,
depending on the design of the converter (type, interference suppression measures,
manufacturer).
• Avoid that the specified limit values stipulated for the drive system (consisting of the
motor and converter) are exceeded.
• You must observe the EMC information from the manufacturer of the converter.
• The most effective method of shielding is to conductively connect a shielded machine
supply cable to the metal terminal box of the machine (with a metal screw connection)
over a large surface area.
• On machines with integrated sensors (e.g. PTC thermistors), disturbance voltages caused
by the converter may occur on the sensor cable.
When used in accordance with their intended purpose, and operated on a line supply with
characteristics according to EN 50160, the enclosed machines comply with the requirements
of the EC Directive regarding electromagnetic compatibility.
1MB..5/6 shaft height 71 ... 355
Operating Instructions, 10/2021, A5E41926185A
Preparations for use
4.12 System-inherent frequencies
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