Ignition hazards
The assessment of operating risks and local operating conditions and the necessary monitoring
methods must be claried 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 specied in the 2014/34/EU and
1999/92/EC directives as well as in the IEC/EN60079 series of standards; or when using the
electrical machine outside the European Community, provided in the country-specic
regulations.
If a third-party certication is available for the machine, then carefully comply with the
technical data dened in it and any special conditions.
The certicate must be available before commissioning.
Explosion hazard from hybrid mixtures
Hybrid mixtures are mixtures of ammable 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 classication,
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 aected 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.
Safety information
2.1General safety instructions
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 11/2023, A5E52779900A 19
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