Engineering Sinamics S120 Booksize; Line Connection Variants; Options When Connecting The Line Supply For Booksize Line Modules - Siemens SINAMICS S120 Engineering Manual

1 Engineering SINAMICS S120 Booksize

Engineering SINAMICS S120 Booksize
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1.1

Line connection variants

1.1.1

Options when connecting the line supply for Booksize Line Modules

A distinction is made between the following line connection versions:
•
Line Modules are directly connected to the line supply
•
Line Modules are connected via an autotransformer
•
Line Modules are connected via an isolation transformer
Danger to life due to electric shock if an isolating transformer is not used
To maintain safe electrical separation, for high voltages, an isolating transformer
must be used.
For voltages higher than > 3 AC 480 V +10 %, install an isolation transformer to
DANGER
bring the voltage into the permissible range of
3 AC 380 V to 3 AC 480 V ±10% (-15% < 1 min).
Fire hazard for the motor due to overload of the insulation
There is higher stress on the motor insulation as a result of a ground fault in an IT
line system or a line system with grounded line conductor.
A possible result is the failure of the insulation with a risk for personnel as a result
of smoke and fire.
WARNING
Engineering manual S120 Booksize
Entry-ID: 109808992, V1.0,
•
For IT line systems, use a monitoring device that signals an
insulation fault.
•
Correct the fault as quickly as possible in IT systems so the motor
insulation is not overloaded.
•
For line supplies with grounded line conductor, use an isolating
transformer with grounded neutral point (on the secondary side)
between the line supply and the drive system.
04/2022
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