BRUSHLESS SERVOMOTORS - ATEX - OPERATING INSTRUCTIONS – 3010/21
4
MOTOR PERFORMANCES
NOTE ON EXPLOSION PROTECTION
•
Motor performances comply with IEC60034-1
once the motor is coupled to a metal flange not
insulated and without additional external
heating.
•
For complex performances cycle, RMS value of
the current shall be within the label data.
•
The maximum speed shall be never exceed.
•
For rotating speed close to 0 [rpm], the RMS
current value shall be halved than label data
MAINTENANCE
Before carrying out any work on the motor, disconnect it
and secure it against restarting.
Attention: danger of accidents! Avoid any contact with
moving parts!
CLEANING
The air passages must be cleaned on a regular basis, depending on
the ambient conditions.
NOTE ON EXPLOSION PROTECTION
•
Clean servomotors in explosion-proof areas
regularly. Prevent dust deposits > 5mm.
•
Explosion protection can only be ensured if
servomotors and brakes are serviced and
maintained correctly.
BEARING LUBRICATION
All motors have 2ZC3 or 2RSC3 bearings with grease suitable for
high and low temperatures and permanent lubrication.
REPAIR INSTRUCTIONS
Any repair work performed during the warranty period is
subject to manufacturer approval.
GENERAL WARNINGS
For motor repairs, it will be necessary to contact the supplier.
INSTRUCTIONS FOR STORAGE
Prolonged electric motor storage (ex. spare motors) must be carried
out the following precautions.
STORAGE LOCATION
Make sure the motor is stored in a dry and dust-free environment with
minimum vibrations (V
eff
≤0.2 mm/s) (damage to the bearings).
Ambient temperature: between -10°C and +40°C, relative humidity <
50%.
ROTOR LOCKING DEVICE
On motors with roller bearings, fix the rotor in place by means of the
locking device, to protect the bearings against damage due to
vibration.
Motors shipped on vibration dampers should also be stored in this
condition.
Where pulleys, half couplings, etc. are already mounted on the shaft
extension, fit the locking device or place the motor on vibration
dampers, if possible.
Use dampers and locking device also for any future transport of the
motor.
CHECK BEFORE COMMISSIONING
BEARINGS
Before commissioning a motor that has been stored for more than 4
years, check the bearings.
For motors without regressing device, grease has to be renewed or
bearings have to be changed after 2 years at the latest.
Even minor corrosion can considerably shorten the
service life of the bearings.
The rotor has to be rotated every month by approx. 30 degrees, in
order to avoid compression spots on the bearings due to static load.
To turn the rotor on brake motors, turn the power on to
unblock its movement. When the rotor has been turned,
switch the power back off.
INSULATION RESISTANCE
Before commissioning check the insulation resistance.
With values ≤ 1kW per Volt rated voltage, dry the
winding.
Check the insulation resistance of each phase against earth by means
of a hand-driven generator (max. 630 VDC) until the measured value
is constant. The insulation resistance of new windings is above 10
MΩ. The resistance can be lowered considerably by moisture.
If, at room temperature, the resistance is below 0.5 MW, the winding
must be dried. In this case the winding temperature must not exceed
80° C.
For drying connect the space heater or another heating device or
apply an AC voltage of 5 or 6% (connect in delta) of the rated motor
voltage to terminals U1 and V1. Repeat the measurement. The motor
can be put into operation when the resistance is above 0.5 MΩ.
Insulation resistance is temperature-dependent, i.e. if the temperature
is increased/decreased by 10K, the resistance value is
halved/doubled, respectively.