Goodrive270 series VFD for fan and pump Installation guidelines
-36-
S1
S2
COM
PW
+ 24V
COM
+ 24V
External powerPNP mode
S1
S2
COM
PW
+ 24V
COM
+ 24V
Internal powerPNP mode
Figure 4±32 PNP mode
4.5 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.
Figure 4±33 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.
(3) Protecting the motor against thermal overload
The motor must be protected against thermal overload. Once overload is detected, current
To Next Page
Loading...
Need help?
General
