Influence On The Line Power Supply Through A Strongly Irregular Torque; Interference Voltages When Operating The Converter; Special Designs And Construction Versions; Special Conditions For Explosion-Proof Machines - Siemens SIMOTICS XP 1MB1 series Operating Instructions Manual

2.9 Influence on the line power supply through a strongly irregular
torque
A strongly irregular torque, for example with the drive of a reciprocating motor, forces a non-
sinusoidal motor current. The emerging harmonics can have an impermissible influence on
the line power supply via the connection lines.
2.10

Interference voltages when operating the converter

Interference voltages when operating the converter
When a converter is in operation, the emitted interference varies in strength depending on
the converter (manufacturer, type, interference suppression measures undertaken). On
machines with integrated sensors (e.g. PTC thermistors), interference voltages caused by
the converter may occur on the sensor lead. This can cause faults which can result in
eventual or immediate death, serious injury or material damage.
● Comply with the EMC information provided by the manufacturer of the converter. This is
how you prevent the limit values stipulated by IEC/EN 61000-6-3 for the drive system
(consisting of the machine and converter) from being exceeded.
● You must put appropriate EMC measures in place.
2.11

Special designs and construction versions

Note
Before carry out any work on the machine, determine the machine version.
If there are any deviations or uncertainty, contact the manufacturer, specifying the type
designation and serial number (see the rating plate), or contact the Service Center
(Page 163).
2.12

Special conditions for explosion-proof machines

Special conditions for the safe use of explosion-protected machines with X marking (excerpt
from EC or EU prototype test certificate, Point 17).
Zone 21 - DMT 01 ATEX E 014X
It is not permissible that the motors are operated with excessively thick deposits of dust.
When mounting motors with the free shaft extension facing upwards, foreign bodies must be
prevented from falling into ventilation openings by taking the appropriate measures.
For motors with permanently attached connecting cable. The free cable ends must be
connected corresponding to the valid installation regulations.
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A

2.9 Influence on the line power supply through a strongly irregular torque

Safety information
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