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Ignition hazards
The assessment of operating risks and local operating conditions and the necessary monitoring
methods must be clarified and made binding by the system operator in consultation with the
responsible supervisory authority. The required measures must be complied with. Regarding
this topic, the machine manufacturer cannot provide any generally applicable
recommendations. Comply with the information provided in these operating instructions.
Note
The basic requirements relating to the assessment of ignition hazards arising from electrical
equipment and their operation in hazardous zones are specified in the 2014/34/EU and
1999/92/EC directives as well as in the IEC/EN 60079 series of standards; or when using the
electrical machine outside the European Community, provided in the country-specific
regulations.
If a third-party certification is available for the machine, then carefully comply with the
technical data defined in it and any special conditions.
The certificate must be available before commissioning.
Explosion hazard from hybrid mixtures
Hybrid mixtures are mixtures of flammable dusts with explosive gas/air atmospheres which can
together create a dangerous explosive atmosphere if they occur at the same time. Changes can
arise in the safety performance characteristics here, such as a change in the zonal classification,
increase in the explosion pressure, reduction in the minimum ignition energy and a reduction in
the maximum temperatures to be complied with.
An explosion can occur. This can result in death, serious injury or material damage.
• For this reason, the relative characteristics must be considered both for gas (zones 0, 1 and
2) and for dust (zones 20, 21 and 22) where hybrid mixtures arise. It is necessary for a
competent assessor to determine in the individual case whether the parameters determining
ignition are unfavorably affected in a particular hybrid mixture.
• Motors with dual plates for G ("Gas") and D ("Dust") may only be used where these two occur
after prior examination of the properties of the hybrid mixtures by the user.
• These explosion-protected machines are not suitable for hybrid explosive environments. Use
in atmospheres where there is a risk of explosion caused by both gas and dust simultaneously
is absolutely prohibited.
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 11/2023, A5E52779900A
Safety information
2.1 General safety instructions
19
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