Wiring Protection - INVT Goodrive270 Series Operation Manual

Goodrive270 series VFD for fan and pump

4.6 Wiring protection

1. Protecting the VFD and input power cable in case of short circuit
The VFD and input power cable can be protected in case of short circuit, avoiding thermal overload.
Carry out protective measures according to the following figure.
Note: Select the fuse according to the manual. In case of short circuit, the fuse protects input power
cables to avoid damage to the VFD; if internal short-circuit occurs to the VFD, it can protect
neighboring equipment from being damaged.
2. Protecting the motor and motor cable in case of short circuit
If the motor cable is selected based on VFD rated current, the VFD is able to protect the motor cable
and motor during short circuit without other protective devices.
 If the VFD is connected to multiple motors, 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.
Keypad interface B
RO2A RO2B RO2C
RO1A RO1B RO1C
Figure 4-40 External keypad interface
VFD
Input cable
Fuse
Figure 4-41 Fuse configuration
-39-
S1 S2 S3 S4/Y1 HDIA AO1 AI1 AI2
+24V PW COM COM AO0 GND 485+ 485- PE
M3 ~
Installation guidelines
+10V
Keypad interface A