GE AF-650 GP Design And Installation Manual page 87

Installation Consideration
2e
2f
3. Lower the IGBT switching frequency.
4.
Modify the inverter waveform, 60° AVM vs.
SFAVM.
5. Install a shaft grounding system or use an
isolating coupling.
6. Apply conductive lubrication.
7. Use minimum speed settings if possible.
8. Try to ensure that the line voltage is balanced to
ground. This can be difficult for IT, TT, TN-CS, or
Grounded leg systems.
9. Use a dU/dt or sinus filter.
7 7
84
Make sure that the impedance from
frequency converter to building ground
is lower that the grounding impedance
of the machine. This can be difficult for
pumps.
Make a direct ground connection
between the motor and load motor.
DET-767c All rights reserved. MG35M402