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Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
8
Inspection and maintenance intervals
Inspection / Maintenance
8.1 Inspection and maintenance intervals
NOTES ON EXPLOSION PROTECTION
• Use only original spare parts from the relevant and valid spare parts lists; other-
wise, the approval for hazardous locations of the motor will become void.
• The routine test must be repeated whenever motor parts relating to explosion pro-
tection are replaced.
• Make sure that the motor is assembled correctly and all openings have been
sealed after service and maintenance work.
• Clean motors for hazardous locations regularly. Prevent dust from building up
higher than 5 mm.
• Explosion protection is largely dependent on the IP enclosure. Therefore, always
check that the seals are fitted correctly and in perfect condition when performing
any work on the machine.
• Explosion protection can only be ensured if motors are serviced and maintained
properly.
• If you repaint motors or gearmotors, observe the requirements for preventing elec-
trostatic charging according to EN / IEC 60079-0, see chapter "Painting" in the cor-
responding detailed operating instructions.
Unit / part of unit Time interval What to do?
Motor • Every 10,000 operating hours Motor inspection:
• Check rolling bearing and
change if necessary
• Replace oil seal
• Clean the cooling air passages
Motor with backstop • Change the low-viscosity grease
of the backstop
Drive •Varies
(depending on external factors)
• Touch up or renew the sur-
faces/anticorrosion coating
Air ducts and surfaces of
the motor and the forced
cooling fan if applicable
•Varies
(depending on external factors)
• Clean the air ducts and surfaces
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