Commissioning
7.4 Checking with motor coupled to the work machine
Installation and Operating Instructions SINAMICS G180
122
Operating Instructions, 02/2019, 4BS0751-007
Checking the vibration
1.
Carry out slowly the complete speed control range. Observe the motor in doing so.
–
If vibrations occur at a certain speed, contact the motor manufacturer for advice. If
required, you can suppress this frequency.
2.
Suppress two frequency bands with a minimum and a maximum value in the menu, which
will then no longer be used by the drive under steady-state operating conditions "P-
DRIVE DATA/fno1" and "P-DRIVE DATA/fno2".
7.4
Checking with motor coupled to the work machine
Perform the following tests with the driven machine.
The measurement should be taken at the highest possible output frequency and load.
Consult the factory fin the case of large difference.
Symmetry of mains and motor current
1.
Measure the mains current and the motor current using a current clamp meter. The
measured value deviates from the displayed value on the screen depending on the type
and quality of the current clamp meter.
2.
Ensure that the same current flows in all three mains power phases with a maximum
deviation of 5% of the inverter rated current. You thus detect whether damaging
imbalance of the mains voltage is present.
3.
The same applies in all motor phases with a maximum deviation of 2%. In the case of
cables laid in parallel, also check the current distribution to the individual conductors.
Here, you recognize insufficiently clamped connections and also damage to the motor.
Checking load-dependent measured values
●
Check the motor current with the couple work machine.
●
Check whether the motor current on the display in stationary operation, i.e. without
acceleration or braking, exceeds the motor current on the rating plate.
Documenting measured values, saving parameter file
Document all measured values from the commissioning in a measurement report and save
the parameters of the inverter with the "IMS" software.
