Siemens SIMOTICS GP Operating Instructions Manual page 68

WARNING
Explosion hazard caused by incorrect painting
The paint coat can become electrostatically charged where there is a thick
coat. Electrostatic discharges can occur. There is a risk of explosion if
potentially explosive mixtures are also present at this moment. This can
result in death, serious injury or material damage.
WARNING
Risk of explosion as a result of processes with high levels
of electrostatic charging.
For paint finishes in explosion group III, the paint can be electrostatically
charged as a result of intensive dust turbulence or processes with high
levels of electrostatic charging. Electrostatic discharges can occur.
Minimize the risk of electrostatic charging by applying effective measures
according to IEC 60079-32-1. This can result in death, serious injury or
material damage.
Electromagnetic compatibility verification:
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.
Converter application:
•
If operated with a frequency converter, the emitted interference
varies in strength, depending on the design of the converter (type,
interference suppression measures, and 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 motor supply cable to the metal terminal box of the
machine (with a metal screw connection) over a large surface area.
•
On motors with integrated sensors (e.g. PTC Thermistors),
disturbance voltages caused by the converter may occur on the
sensor cable.
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