Goodrive10 Series Mini VFD Installation guidelines
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3.3.2 Protect the motor and motor cables
If the motor cable is selected based on the rated current of the VFD, the VFD can protect
the motor cable and motor when a short circuit occurs. The VFD provides the motor thermal
overload protection function, which can protect the motor, and lock the output and cut off the
current when necessary.
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.
3.3.3 Establish a bypass connection
In some critical occasions, industrial frequency conversion circuit is necessary to ensure
proper operation of the system when a VFD fault occurs. In some special cases, such as,
only soft startup is needed, it will convert to power-frequency operation directly after soft
startup, corresponding bypass link is also needed.
Do not connect any power source to VFD output terminals U, V and W.
The voltage applied to motor cable may cause permanent damage to
the VFD.
If frequent switch-over is needed, you can use the switch which carries mechanical interlock
or a contactor to ensure motor terminals will not be connected to input power cables and
VFD output ends simultaneously.
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