Siemens SIMOTICS XP 1MB5 SH400, Руководство по эксплуатации, Страница: 23 / 166

Type of protection Ex tb
This machine has "Protection through enclosure" (Ex tb IIIC) type of protection according to
IEC / EN 60079‑0 and IEC / EN 60079‑31. As a consequence, it can be operated in hazardous
areas in the presence of combustible, conductive dust in Zone 21 according to
IEC / EN 60079‑10‑2 .
WARNING
Explosion hazard
This machine is not designed for use in the following areas:
● Explosive gas atmospheres
● Areas in which an explosion hazard exists due to hybrid mixtures
● Areas with dust of explosive materials
● Areas with pyrophoric materials
An explosion can occur if the machine is operated in these areas. This can result in death,
serious injury or material damage.
● Never operate this machine in the above mentioned areas.
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 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 observed.
An explosion can result. 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.
3.2 Rating plate
Rating plate
The rating plate shows the identification data and the most important technical data. The data
on the rating plate and the contractual agreements define the limits of proper usage.
Description
3.2 Rating plate
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A
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