Nord Drivesystems SK 180E Series, User Manual

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2 Assembly and installation
BU 0180 en-4118 53
2.5 Operation in potentially explosive environments
WARNING
Danger of explosion due to electricity
Electric sparks may ignite an explosive atmosphere.
• Do not open the device in an explosive atmosphere and do not remove any covers (e.g.
diagnostic openings).
• All work on the device must only be carried out with the power to the system switched
off .
• Wait for the required time (≥ 30 min) after switching off.
• Before starting work, check that all relevant components (voltage source, connection
cables, connection terminals of the device) are free of voltage using suitable measuring
equipment.
WARNING
Explosion hazard due to high temperatures
High temperatures may cause the ignition of an explosive atmosphere.
Temperatures may occur within the device and the motor, which are higher than the maximum
permissible surface temperature of the housing. Dust deposits may restrict the cooling of the
device.
• Clean the device at regular intervals to prevent the accumulation of impermissible dust
deposits.
• Do not open or remove the device from the motor in an explosive atmosphere.
With appropriate modification, the device can be used in certain potentially explosive areas.
If the device is connected to a motor and a gear unit, the EX labelling of the motor and the gear unit
must also be observed. Otherwise the drive must not be operated.
2.5.1 Operation in potentially explosive environments - ATEX zone 22 3D
All of the conditions which must be observed for operation of the frequency inverter in an explosion
hazard environment (ATEX) are listed below.
2.5.1.1 Modification of the device for compliance with Category 3D
Only a specially modified device is permissible for operation in ATEX zone 22. This adaptation is only
made at the NORD factory. In order to use the device in ATEX Zone 22, the diagnostic caps are
replaced with aluminium / glass versions, among other things.