Auxiliary Voltage Busbar System; General Information - Siemens SINAMICS S120 Equipment Manual

Electrical installation
4.5 Connections
4.5.3

Auxiliary voltage busbar system

4.5.3.1

General information

Availability
The auxiliary voltage busbar system is included in the following S120 Cabinet Modules:
● Smart Line Module
● Active Line Module
● Motor Module in chassis format
● Booksize Base Cabinet
● Central Braking Module
● Auxiliary Power Supply Module
Description
The auxiliary voltage busbar system installed in the Cabinet Module is used to distribute the
voltages provided by an auxiliary power supply.
Ideally, these voltages are generated by an Auxiliary Power Supply Module. The maximum
load-carrying capacity of the auxiliary voltage busbar system is 100 A according to IEC (or
80 A according to UL).
The auxiliary voltage busbar system is equipped with Faston terminals. The maximum load-
carrying capacity of a Faston connection point is 20 A.
NOTICE
A Faston plug can be inserted up to 10 times, after which it loses its contact reliability.
The auxiliary voltage busbar system is ready-to-operate as supplied. Its factory settings
ensure that the required voltages can be fed to the relevant areas of the cabinet from the
busbar. The following diagram shows the assignment.
Figure 4-9
64
Auxiliary voltage busbar system for voltage distribution
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A