Have work inuencing 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 ameproof 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.
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 that go beyond this scope, contact the Service Center (Page12).
9.3.2 Anti-condensation heating
Explosion hazard due to improper maintenance of the anti-condensation heating
If the anti-condensation heating is not correctly repaired, e.g. if unauthorized or untested spare
parts are used, this can result in explosions during operation in a potentially explosive
atmosphere. This can result in death, serious injury or material damage.
• Only appropriately trained specialists in the service center (Page 12) are authorized to repair
anti-condensation heating systems. The anti-condensation heating must then be subject to
a routine test, which requires extensive specialist knowledge.
• Only use authorized and tested spare parts.
Maintenance
9.3Corrective maintenance
1MB..1/2/3/4 - shaft heights 63 ... 355
128 Operating Instructions, 11/2023, A5E52779900A
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