Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 121)

PC NC Maintenance Manual The VS-626M5
4-100
Dealing with Emission Noise
To reduce the emission noise from the output side, cover the wirings with a
metallic shield rather than installing a output noise filter. Make the wiring
distance between the power line and signal line 30cm or longer, to reduce
the emission noise.
Figure 4.13: Dealing with Emission Noise
Wiring Distance between Inverter and Motor
The signal and power cables between the inverter and the motor must be
separated and the cable extension must be as short as possible (20m or
less).
5. Grounding
• Ground the ground terminal ( ).
200V class: Ground to 100
Ω
or less
400V class: Ground to 10
Ω or less
• Never ground the inverter or the converter in common with weld-
ing machines, motors, or other large-current electrical equipment.
Wiring for grounding cable must be separated from the large-cur-
rent electrical equipment.
• Use ground wires, keeping the length as short as possible.
• Always ground converters, inverters and motors using a ground
terminal, even when equipment is grounded through sill channel
or steel plate.
Power
Supply MCCB
Signal Line
Control Device
Metallic
Conduit
30 cm or longer
`
VS-
656MR5 VS-
626M5
M
L