8.2 Operation in hazardous areas
Faults in operation
Deviations from normal operation such as increased power consumption, temperatures or
vibrations, unusual noises or odors, tripping of monitoring devices, etc., indicate that the
machine is not functioning properly. This can cause faults which can result in eventual or
immediate death, serious injury or material damage.
● Immediately inform the maintenance personnel.
● If you are in doubt, immediately switch off the motor, being sure to observe the system-
Risk of corrosion due to condensate
Humid air can condense inside the machine during operation as a result of intermittent duty
or load fluctuations. Condensate can collect inside the motor. Damage such as rust can result.
● Make sure that any condensation can drain away freely.
Explosion hazard if the bridging is removed from the insulated bearing
Removing the factory-fitted bridging of the insulated bearing leads to potential differences
between the rotor and the grounded motor. This can cause the generation of sparks, which
especially in an explosive atmosphere can ignite surrounding dust or combustible gases.
Explosions can occur. There is also a risk of an electric shock. Death, serious injury, or
material damage will result.
Do not open the bridging of the bearing insulation during operation.
Operation in hazardous areas
In addition to the danger notices in the previous section, the following also applies:
Electrical systems in hazardous zones must be mounted, installed, and operated in
accordance with the applicable rules and regulations. It is assumed that companies operating
these plants and systems take the appropriate measures to ensure that these regulations and
directives are observed during mounting, installation and operation, and that the appropriate
tests are carried out. We recommend that these tests be carried out and documented in
coordination with the responsible authorities.
specific safety conditions.
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017