Yaskawa Varispeed-656 DC5 - Manual (Page 33)

3 WIRING
E-23
„ Ground Wiring
Make sure to ground the ground terminal . (200 V class: Ground to 100 Ω or less, 400 V
class: Ground to 10 Ω or less).
Do not share the ground wire with other devices, such as welding machines or power tools.
Separate the ground wires from the wirings for power tools.
Always use a ground wire that complies with technical standards on electrical equipment
and minimize the length of the ground wire.
When using more than one VS-656DC5, be careful not to loop the ground wire.
Fig. 11 Ground Wiring
OK
OK
NO!