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Only install machines with type of protection increased safety "e" or "eb" and machines "nA"
or "ec" in hazardous zones, carefully complying with the regulations laid down by the
responsible regulatory body. The responsible regulatory body is responsible for determining
the hazard level (classifying zones). For machines with Ex "t", under no circumstances must
a layer of dust be greater than 5 mm!
● If there are no other specifications in the EU-type examination certificate or on the rating
plate regarding operating mode and tolerance, electrical machines are designed for
continuous duty and normal starting procedures that are performed infrequently and do
not result in excessive temperature rise. Only use these machines for the operating mode
specified on the rating plate.
● If an anti-condensation heating system is available, it may only be switched on when the
machines are not in operation.
See also
Thermal protection (Page 43)
Explosion hazard due to overheating of the machine caused by a layer of dust
Deposits of dust have a thermal insulation effect, which can lead to the machine overheating.
The maximum surface temperature of the machine cannot be adhered to. The dust can
ignite, resulting in an explosion. This can result in death, serious injury or material damage.
● Dust the machine regularly.
● Do not allow dust layers thicker than 5 mm to build up on the machine surface.
● Do not switch the machine on until the dust has been removed.
Risk of explosion due to excessive bearing temperature
The surface temperature cannot be maintained within maximum permissible limits if the
bearing becomes too hot. The dust can ignite, resulting in an explosion. This can result in
death, serious injury or material damage.
● Monitor the bearing temperature.
● In addition to the current-dependent overload protection device located in the three
phases of the connecting cable, we recommend that you also monitor the temperature
rise in the machine using temperature sensors integrated in the stator winding.
Risk of explosion due to static charging
If you clean the motor, plastic components may become statically charged and ignite a
potentially explosive atmosphere. An explosion can occur. This can result in death, serious
injury or material damage.
● When cleaning ensure that there is absolutely no explosive atmosphere present.
● Clean the plastic parts and components so that absolutely no static charging occurs
● Do not use compressed air for cleaning.
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 06/2020, A5E44455710A
8.1 Safety instructions for operation
Operation
101
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