Wiring Protection; Protect The Vfd And Input Power Cable When A Short Circuit Occurs; Protect The Motor And Motor Cables; Establish A Bypass Connection - INVT Goodrive20-UL VFD Series Operation Manual

Goodrive20-UL Series VFD
If input signal comes from PNP transistors, set the U-shaped jumper based on the power used
according to the following figure.

3.3 Wiring protection

3.3.1 Protect the VFD and input power cable when a short circuit occurs

Protect the VFD and input power cable in short circuit situations and against thermal overload.
Arrange the protection according to the following guide.
Note: Select the fuse as the manual indicated. The fuse will protect the input power cable from
damage in short-circuit situations. It will protect the surrounding devices when the internal of
the VFD is short circuited.

3.3.2 Protect the motor and motor cables

The VFD protects the motor and motor cable in a short-circuit situation when the motor cable
is dimensioned according to the rated current of the VFD. No additional protection devices are
needed.
 If the VFD is connected to multiple motors, a separate thermal overload

3.3.3 Establish a bypass connection

It is necessary to set power frequency and variable frequency conversion circuits for the
assurance of continuous normal work of the VFD if faults occur in some significant situations.
S1
S2
COM
COM
+ 24V
PW
+ 24V
Figure 3-10 PNP mode
Input cable
Figure 3-11 Fuse configuration
switch or a circuit breaker must be used for protecting each cable and
motor. These devices may require a separate fuse to cut off the
short-circuit current.
S1
S2
COM
PW
+ 24V
VFD
Fuse
-19-
Installation guidelines
COM
+ 24V