Maintenance
9.3 Corrective maintenance
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 06/2020, A5E44455710A
121
9.3.1 Machines with a certificate extended with an "X"
The machine marking based on IEC / EN 60079–0 was supplemented by the "X" symbol.
● Perform maintenance, repair and modification work on explosion-protected machines in
strict compliance with the corresponding national health and safety legislation, the safety
instructions and descriptions in the general maintenance instructions.
Have work influencing explosion protection performed by the manufacturer or by a specialist
workshop for electrical machinery authorized by the manufacturer. This includes the
following operations, for example:
● Repairs to the stator or rotor windings and to the terminals
● Repairs to the ventilation system
● Repairs to the bearings
● Dismantling machines with flameproof enclosures
● Connection work performed in the terminal box
Identify the work performed by an additional repair plate bearing the following information:
● Date
● Company carrying out repair
● Type of repair
● Reference number of the repair technician regarding repair work
Test in accordance with the relevant EU directives after repair.
Comply with the IEC / EN 60079-17 standard during all service and maintenance work on
the machine.
Risk of explosion as a result of inadmissible repair work
Repairs are only permissible within the scope of the work described in these operating
instructions. Otherwise an explosion can occur in an explosive atmosphere. This can result
in death, serious injury or material damage.
● For repairs to go beyond this scope, please contact the Service Center.
Explosion hazard due to increased surface temperature
Components within the motor may be hotter than the maximum permissible surface
temperature for the enclosure. In an explosive atmosphere, dust can ignite and an explosion
occur. This can result in death, serious injury or material damage.
● Do not open the motor in an explosive and dusty atmosphere when it is still at normal
operating temperature.
● Allow the machine to cool down before opening it.
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