Safety notes
Explosion-protected machines
82 56100000002002, 01/2016
2.6 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.
Observe the EMC instructions of the converter manufacturer in order to avoid
exceeding the limit values according to IEC/EN 61000-6-3 for drive systems
comprising machine and converter. You must put appropriate EMC measures in
place.
Note
The increased level of danger in haz
ardous areas demands that you pay particular
attention to the notes marked with
2.7 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
● Do not operate the motors with excessively thick deposits of dust.
● When the motors are mounted with the free shaft end pointing upwards, prevent
foreign bodies from dropping into the ventilation openings using an appropriate
mechanical design.
● For motors with a fixed connecting cable: The free end of the cable must be
connected according to valid regulations for electrical installations.
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