Goodrive350 IP55 High-ingress Protection Series VFD
Installation Guide
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4.5 Wiring protection
4.5.1 Protect the VFD and input power cable in short-circuit
Protect the VFD and input power cable during short-circuit to avoid thermal overload.
Carry out protective measures according to the following requirements.
Figure 4-19 Fuse configuration
VFD
Fuse
Input cable
M3
Note:
Select the fuse according to operation manual. During short-circuit, the fuse will protect
input power cables to avoid damage to the VFD; when internal short-circuit occurred to the
VFD, it can protect neighboring equipment from being damaged.
4.5.2 Protect the motor and motor cable in short circuit
If the motor cable is selected based on rated VFD current, the VFD will be able to protect the
motor cable and motor during short circuit without other protective devices.
If the VFD is connected to multiple motors, it is a must to use a separated thermal
overload switch or breaker to protect the cable and motor, which may require the fuse
to cut off the short circuit current.
4.5.3 Protect motor and prevent thermal overload
According to the requirements, the motor must be protected to prevent thermal overload. Once
overload is detected, users must cut off the current. The VFD is equipped with motor thermal
overload protection function, which will block output and cut off the current (if necessary) to
protect the motor.
