Ground Wiring - YASKAWA FSDrive-MV1S Instructions Manual

Wiring the Main Circuit Output Terminals
Observe the following precautions when wiring the main circuit output terminals.
Connecting a Motor to the Inverter
Connect the motor lead wires U, V, and W to the Inverter main circuit output terminals U, V, W respectively.
Confirm that the motor rotates in the forward direction under the forward run command during trial operation.
If the motor rotates in reverse, check the output terminal codes and the motor lead wire codes, and switch over
any two of the output terminals U, V, and W and reconnect.
Never Connect a Power Supply to Output Terminals
Never connect a power supply to the output terminals U, V, and W. Applying voltage to the output terminals
will destroy the internal circuits of the Inverter.
Never Short or Ground Output Terminals
If the output terminals are touched with bare hands or the output wires come into contact with the Inverter
case, an electric shock or grounding will occur. This is extremely hazardous. Do not short the output wires.

Ground Wiring

Observe the following when wiring grounding lines.
Always ground the grounding terminals.
Grounding terminal EA:
Control circuit (400 Vmax.): Ground resistance 10Ω or less, wire size 1.6 mm
Do not share the grounding line with other devices, such as welding machines and power tools.
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Always use a ground wire that complies with technical standards on electrical equipment, and always min-
•
imize the length of the ground wire.
When using more than one Inverter, ground to one point and be careful not to loop the grounding line.
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-8
2
Ground resistance 10Ω or less, wire size 5.5 mm
Fig 2.4 Ground Wiring
2
min.
2
min.