Siemens SINAMICS G120 Operating Instructions Manual page 53

((Electric shock through contact with the motor connections))
As soon as the converter is connected to the line supply, the motor connections of the
converter may carry dangerous voltages. When the motor is connected to the converter,
there is danger to life through contact with the motor terminals if the terminal box is open.
• Close the terminal box of the motor before connecting the converter to the line supply.
NOTICE
Damage to the converter through inappropriate supply system
Operating the converter with integrated or external line filter on an ungrounded supply
system will destroy the line filter.
• Therefore, always connect the converter with an integrated or external line filter only to
Fire hazard for the motor due to overload of the insulation
There is a greater load on the motor insulation due to a ground fault in an IT system. A
possible result is the failure of the insulation with a risk for personnel through smoke
development and fire.
• Use a monitoring device that signals an insulation fault.
• Correct the fault as quickly as possible so the motor insulation is not overloaded.
NOTICE
Damage to the converter through fault in IT system
A ground fault on the motor cable during operation can result in a shutdown of the
converter due to overcurrent. Under unfavorable conditions, the overcurrent may damage
the converter.
• Use an output reactor in the IT system.
Connecting the line supply cable to the converter
Procedure
To connect the converter to the supply system, proceed as follows:
1. If available, open the terminal covers of the converter.
2. Connect the line supply to terminals U1/L1, V1/L2, and W1/L3.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
DANGER
supply systems with grounded star point (TN system).
WARNING
4.3 Installing the Power Module
Installing
53