Precharging Circuit For The Basic Line Modules, Frame Size Gd - Siemens SINAMICS S120 Manual

Line Modules
3.2 Basic Line Modules
Table 3- 11
3.2.6

Precharging circuit for the Basic Line Modules, frame size GD

Description
When switching on, the precharging circuit ensures that the DC-link capacitors of the Basic
Line Module and the connected Motor Modules are precharged with current limiting.
After precharging has been completed, the circuit breaker is closed and the precharging
circuit bypassed; the Basic Line Module is then directly connected to the line supply.
The precharging circuit comprises a precharging contactor and precharging resistors; the
circuit must be protected against overcurrent using suitable protection measures.
To increase the permissible DC-link capacitance, the precharging resistors can also be
connected in parallel in each phase.
Damage to the units if the precharging circuit is faulty
When it is switched on, the Basic Line Module can be destroyed if the precharging circuit is
not correctly implemented.
For Basic Line Modules, frame size GD, the precharging circuit must be implemented
according to the following circuit and the notes for dimensioning the various components.
106
Line voltage assignment for the setting at the fan transformer (3 AC 500 ... 690 V)
Line voltage
500 V ± 10%
525 V ± 10%
575 V ± 10%
600 V ± 10%
660 V ± 10%
690 V ± 10%
WARNING
Tap at the fan transformer (-T10)
500 V
525 V
575 V
600 V
660 V
690 V
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
Chassis power units