Goodrive300-19 series open loop vector inverter special for hosit Installation guidelines
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Fig 4-23 PNP modes
4.4 Layout protection
4.4.1
Protecting the inverter and input power cable in short-circuit situations
Protect the inverter and input power cable in short circuit situations and against thermal overload.
Arrange the protection according to the following guidelines.
Fig 4-24 Fuse configuration
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 inverter is short circuited.
4.4.2
Protecting the motor and motor cable in short-circuit situations
The inverter protects the motor and motor cable in a short-circuit situation when the motor cable is
dimensioned according to the rated current of the inverter. No additional protection devices are
needed.
If the inverter is connected to multiple motors, a separate thermal overload 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.
4.4.3
Protecting the motor against thermal overload
According to regulations, the motor must be protected against thermal overload and the current must
be switched off when overload is detected. The inverter includes a motor thermal protection function
that protects the motor and closes the output to switch off the current when necessary.
