Electrical connection
8.1 Permissible line system types
1FW6 Built-in torque motors
Configuration Manual, 07/2017, 6SN1197-0AE00-0BP9
473
Electric shock caused by high leakage currents
When touching conductive parts of the machine, high leakage currents can result in an
electric shock.
• For high leakage currents, observe the increased requirements placed on the protective
conductor. The requirements are laid down in standards EN 61800-5-1 and EN 60204-1.
• For high leakage currents, attach warning symbols to Power Drive System .
Risk of electric shock as a result of residual voltages
There is a risk of electric shock if hazardous residual voltages are present at the motor
connections. Even after switching off the power supply, active motor parts can have a
charge exceeding 60 μC. In addition, even after withdrawing the connector 1 s after
switching off the voltage, more than 60 V can be present at the free cable ends.
• Wait for the discharge time to elapse.
Permissible line system types
Permissible line system types and voltages
The following table shows the permissible line voltages of TN line supply systems for the
motors.
Table 8- 1 Permissible line voltages of TN line supply systems, resulting DC link voltages and con-
verter output voltages
Permissible line sup-
ply voltage
Resulting DC link voltage U
DC
Converter output voltage (rms value)
U
a max
400 V 600 V (controlled)
425 V (controlled)
When using the SINAMICS S120 drive system, the motors are always approved for
operation on the following line supplies:
● TN line systems with grounded neutral point
● TT line systems with grounded neutral point
● IT line systems
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