Layout Protection - Salicru CV10-002-S2 User Manual

3.3 Layout protection

3.3.1 Protect 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.
Note: Select the circuit breaker as the manual indicates. The circuit breaker 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.
3.3.2 Protecting the motor and motor cables
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 also may require a separate circuit breaker to cut off the short-circuit
current.
3.3.3 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.
In some special situations, for example, if it is only used in soft start, the inverter can be conversed into power
frequency running after starting and some corresponding bypass should be added.
 Never connect the supply power to the inverter output terminals U, V and W.
If frequent shifting is required, employ mechanically connected switches or contactors to ensure that the motor
terminals are not connected to the AC power line and inverter output terminals simultaneously.
Installation Guidelines
Figure 3-7 Fuse configuration
Power line voltage applied to the output can result in permanent damage to
the inverter.
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