Supplementary installation, operating and maintenance instructions English
Explosion-proof three-phase asynchronous motors with squirrel-cage rotor for high voltage
815001 Edition 09.2020
16
D14-TAGspecial ATEX transponder (RFID System iID®2000, 13.56 MHz based on ISO 15693) is used.
The data may be read only with a reading device that complies with
2014/34/EU.
7. External heat and cold sources
If external sources of heat and cold are present, no additional measures are necessary if the temperatures at
the installation site are not exceeded. If they are exceeded or if an impact on the operating temperatures or
maximum surface temperatures are anticipated, suitable measures must be taken to maintain and demon-
strate explosion protection. In case of doubt, the manufacturer must be consulted.
8. Maintenance and repair
Maintenance, repair and modifications to explosion-protected machines in Germany are subject to the Ger-
man Ordinance on Industrial Safety (BetrSichV), the Explosion Protection Ordinance (ExVO, 11.GSGV),
the safety instructions and the descriptions in the general maintenance manual.
Outside Germany, the relevant national regulations must be observed!
Further guidance on testing and maintenance of electrical installations and repair and overhaul of electrical
equipment is given in IEC/EN 60079-17 and IEC/EN 60079-19. Work that has an impact on explosion protec-
tion includes:
- Repairs to the stator winding and terminals,
- Repairs to the ventilation system
- Repairs to the bearing and sealing of dust ignition-proof motors (Ex 2D, 3D)
and this may only be carried out by VEM service personnel or by/in authorised workshops of qualified per-
sonnel who have the necessary knowledge based on their professional training, experience and instruction.
For dust ignition-proof motors, the dust ignition protection depends very much on the local conditions. For
this reason,
the motors in these areas must be checked and maintained regularly.
Thick layers of dust lead to a temperature increase on the
surface of the motor. Dust deposits on motors and even their complete filling with dust must there-
fore be avoided as far as possible by appropriate installation and ongoing maintenance.
The specified surface temperature of the motor is only valid if the dust deposits on
the motor do not exceed a thickness of 5 mm. These starting conditions (type of dust, maximum layer thick-
ness, etc.) must be ensured.
The motor must not be opened until sufficient time has elapsed to allow the in-
ternal temperatures to drop to non-ignitable levels. If the motors have to be opened for maintenance or repair
work, this work must be carried out in a dust-free room if possible. If this is not possible, suitable measures
must be taken to prevent dust from entering the enclosure.
During disassembly, special care must be taken to ensure that the parts necessary for the tightness of the
construction, such as seals, flat surfaces etc., are not damaged.
Careful and regular maintenance, inspections and servicing are necessary to detect and eliminate possible
faults in good time before consequential damage can occur. Since the operating conditions cannot be de-
fined exactly, only general time limits can be given, provided that operation is trouble-free. They must always
be adapted to the local conditions (dirt, load, etc.).
What needs to be done?
Time interval
Deadlines
Initial inspection
After approx. 500 operating hours
At the latest after six months
Airway control and
surface of the motor
depending on the local
degree of contamination
Relubrication (optional)
See rating plate or lubrication plate
Main inspection
Approx. 10,000 operating hours
Once a year
Drain condensation water
depending on climatic conditions
The necessary lubrication intervals for roller bearings deviate from the inspection intervals and must
be observed separately!
The machines are equipped with a relubrication device as standard. The binding specifications for storage
and lubrication can be found on the rating plate. Further information on storage can be found in the assem-
bly, operating and maintenance instructions for transnorm motors.
