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Maintenance
9.2 Corrective Maintenance
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.
Risk of explosion due to alteration of the ignition gap geometry
Changing ignition gap geometries (gap dimensions) as part of repair work according to the
minimum specifications of IEC / EN 60079–1 is not permissible.
This can result in death, serious injury or material damage.
• Obtain the gap dimensions of the electrical machine from the manufacturer for the repair
9.2.2
Anti-condensation heating
Incorrectly repairing 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 141) are authorized to
• Only use authorized and tested spare parts.
120
WARNING
or restoration of ignition gap geometries.
WARNING
repair anti-condensation heating systems. The anti-condensation heating must then be
subject to a routine test, which requires extensive specialist knowledge.
Operating Instructions, 03/2018, A5E41926185A
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