YASKAWA G7 Series Technical Manual page 50

Incorrect Noise Filter Installation
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Wiring the Output Side of Main Circuit
Observe the following precautions when wiring the main output circuits.
Connecting the Drive and Motor
Connect output terminals U/T1, V/T2, and W/T3 to motor lead wires U/T1, V/T2, and W/T3, respectively.
Check that the motor rotates forward with the forward run command. Switch over any two of the output
terminals to each other and reconnect if the motor rotates in reverse with the forward run command.
Never Connect a Power Supply to Output Terminals
Never connect a power supply to output terminals U/T1, V/T2, and W/T3. If voltage is applied to the output
terminals, the internal circuits of the Drive will be damaged.
Never Short or Ground Output Terminals
If the output terminals are touched with bare hands or the output wires come into contact with the Drive
casing, an electric shock or grounding will occur. This is extremely hazardous. Do not short the output wires.
Do Not Use a Phase Advancing Capacitor or Noise Filter
Never connect a phase advancing capacitor or LC/RC noise filter to an output circuit. The high-frequency
components of the Drive output may result in overheating or damage to these part or may result in damage to
the Drive or cause other parts to burn.
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Power
supply
MCCB
MCCB
General-
purpose
noise filter
Power
MCCB
supply
General-
purpose
noise filter
MCCB
Fig 2.7 Incorrect Power supply Noise Filter Installation
Drive
IM
Other
controllers
Drive
IM
Other
controllers
Do not use general-purpose noise filters. General-
purpose noise filter can not effectively suppress
noise generated from the Drive.