Auxiliary Supply; Power Unit Infeed - Siemens SINAMICS DCM Betriebsanleitung

Functions, monitoring and protective functions

7.4 Auxiliary supply

7.4 Auxiliary supply
Function of the auxiliary supply
An auxiliary supply supplied by the customer is fed in to all variants without options (see
Chapter External supply (Page 84)). This electric circuit is switched via a control voltage
main switch with a manually operated knob through the cabinet door. The cabinet door can
only be opened when the control voltage main switch is disconnected.
All auxiliary and additional components, the exciter circuit and the feeders for the fan of the
DC motor are supplied by the auxiliary supply (3-ph 400 V AC 50 Hz or 3-ph
460 V AC 60 Hz). The AOP30 is provided in the cabinet door for simple operation and
diagnostics and a sound technical overview of the drive cabinet provides the detailed
documentation including the circuit manual with the circuit diagram and terminal diagram.
The auxiliary supply is used for the following purposes:
● Supply of the field power unit with 1-ph 400 V AC 50 Hz or 1-ph 460 V AC 60 Hz
● Supply of the outgoing circuit of the motor fan with 3-ph 400 V AC 50 Hz or 3-ph
460 V AC 60 Hz
● Supply of the unit fan of the the force-ventilated converter equipment ≥ 400 A DC rated
current with 3-ph 400 V AC 50 Hz or 3-ph 460 V AC 60 Hz
● Generation of an internal control voltage 1-ph 230 V AC 50 Hz or 60 Hz
The internal control voltage is used for the following purposes:
– Feed for the electronics power supply of the converter equipment
– Supply of the system-internal control voltage circuit to control the field-circuit
– Supply of the cabinet fan in systems from 15 A DC rated current up to 280 A DC rated
7.5

Power unit infeed

Function of the infeed of the power unit
The power unit infeed for the armature circuit is 3-phase. The components in the main circuit
are designed according to the rated data of the converter cabinet on the rating plate.
A different rated voltage of the supply system or a design adapted to the data of the
connected DC motor must be specified in the course of request or order and can be taken
into account as an option or in the form of an engineering solution.
108
contactor, line contactor / circuit breaker and contactor(s) for the motor fan, the
contactor for the device fan and the contactor for the cabinet fan
current
Operating Instructions, 04/2015, A5E36161239/RS-AA/001
SINAMICS DCM Cabinet