Maintenance
9.3 Corrective maintenance
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120 Operating Instructions, 06/2020, A5E44455710A
● Charge transfer limit
– 60 nC for Group I or Group IIA devices
– 25 nC for Group IIB devices
– 10 nC for Group IIC devices
– 200 nC for Group III devices (values not valid for strong charge generating processes)
● Breakdown voltage ≤ 4 kV for explosion group III (gas and dust)
Explosion hazard caused by incorrect painting
The paint coat can become electrostatically charged if an excessively thick paint coat is
applied. Electrostatic discharge can then 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.
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.
Suitability test of the paint system for hazardous areas
Suitability certificates for the electrostatic suitability on explosion-protected machines are
available for paint systems ordered as standard. These certificates are not available for non-
standard or customized paint systems. Take into consideration that the provided evidence is
not valid for repaintings.
9.3 Corrective maintenance
Observe the following when carrying out any work on the machine:
● Comply with the general safety instructions (Page 11).
● Comply with the applicable national and sector-specific regulations.
● When using the machine within the European Union, comply with the specifications laid
down in EN 50110-1 regarding safe operation of electrical equipment.
If the motor has to be transported, please observe the information and instructions in the
"Transport (Page 34)" chapter.
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