Goodrive35 inverters Installation guidelines
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4.5 Layout protection
4.5.1 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 4-25 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.
4.5.2 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.
4.5.3 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.
4.5.4 Implementing a bypass connection
It is necessary to set power frequency and variable frequency conversion circuits for the
assurance of continuous normal work of the inverter if faults occur in some significant
situations.
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