INVT Goodrive270 Series User Manual

Goodrive270 series VFD for fan and pump Installation guidelines
-39-
Keypad interface A
Keypad interface B
+24V
PW
COM
COM
AO0
GND
485+
485-
PE
+10V
AI2
AI1
AO1
HDIA
S4/Y1
S3
S2
S1
RO2A
RO2B
RO2C
RO1A
RO1B
RO1C
Figure 4-40 External keypad interface
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.
Input cable
VFD
M3
~
Fuse
Figure 4-41 Fuse configuration
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.

INVT Goodrive270 Series Specifications

General

Brand	INVT
Model	Goodrive270 Series
Category	Water Pump
Language	English