Auxiliary Power Supply System; General Information - Siemens SINAMICS S120 Manual

4.5.5

Auxiliary power supply system

4.5.5.1

General information

Availability
To facilitate the auxiliary voltage supply to S120 Cabinet Modules, the individual modules are
fitted with a special, standardized auxiliary voltage supply system. This system is delivered
pre-installed. The cabling required from the Auxiliary Power Supply Module into the relevant
Cabinet Module are factory-installed.
In the following S120 Cabinet Modules, two further voltage taps are available for the
customer at the terminal for each voltage level:
● Basic Line Connection Modules
● Active Line Connection Modules
● Motor Modules
● Heat Exchanger Modules
Description
The auxiliary power supply system installed in the Cabinet Module distributes the voltages
provided by an auxiliary power supply.
Infeed possibilities include option K76 "Auxiliary power generation in the Line Connection
Module" or to connect the auxiliary power supply system to an external source.
The maximum load capability of the auxiliary power supply system is 28 A. If the total power
requirement of the cabinet line-up exceeds the maximum load capability, the auxiliary power
supply system must be divided into segments and several infeed points selected.
The auxiliary power supply system for an individual cabinet unit consists of terminals and the
connecting cables.
The terminals comprise two terminal blocks (-X140, -X150) and one fuse (-F150) for the 24 V
DC supply.
The terminals are used to tap the necessary auxiliary voltages and to transfer auxiliary
voltages to the terminal block in the adjacent cabinet unit.
The auxiliary power supply system is ready-to-operate as supplied. The cabling required
from the terminal block into the relevant Cabinet Module are factory-installed. Only the
connection to the adjacent transport unit must be established on site by connecting the
cables to the next terminals. These connections are already established within transport
units.
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A
Electrical installation
4.5 Connections
81