Power Supply Line Protection - YASKAWA SGM Series User Manual

D Connect the ground wire directly to the junction box or the ground plate.
Incorrect
D When grounding a noise filter inside a unit, connect the noise filter ground wire and the
ground wires for other devices inside the unit to the ground plate of the unit first, and then
ground these wires.

5.7.2 Power Supply Line Protection

The SERVOPACK is connected directly to a commercial power supply (200 or 100 V) . There-
fore, always use an appropriate molded-case circuit breaker (MCCB) or fuse for each SERVO-
PACK (see Table 5.5) to protect the power supply line from ground faults or shorting and to
prevent fires. A fast-operating fuse cannot be used because the SERVOPACK power supply
is a capacitor input type, and a fast-operating fuses may blow out when power is turned ON.
Noise Noise
filter filter
Thick
Shielded
and short
ground wire
Correct
Figure 5.8
Noise
filter
Ground
Figure 5.9
5 -17
5.7 Application Precautions
5