IMO iDrive2 XKL Instruction Manual page 17

iDrive2 inverters
 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 for protection.
3.3.3 Implementing a bypass connection
It may be necessary to set power frequency and variable frequency conversion circuits for the assurance of
continuous normal work of the inverter if faults.
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. Power line
voltage applied to the output can result in permanent damage to the inverter.
If frequent switching between units us required, use contactors with mechanical interlock to ensure that the motor
terminals are not connected to the AC power line and inverter output terminals simultaneously.
17
Installation Guidelines