Auxiliary Power Supply Modules (Available Soon); Design - Siemens SINAMICS G130 Engineering Manual

7.3.8 Auxiliary Power Supply Modules (available soon)

7.3.8.1

Design

Auxiliary Power Supply Modules are generally installed in large-scale drive line-ups with high auxiliary power
requirements. These modules supply two auxiliary voltages to the auxiliary voltage supply system of the SINAMICS
S120 Cabinet Modules, i.e.:
·
Auxiliary voltage: 230 V (AC voltage, single-phase),
·
Auxiliary voltage: 24 V (DC voltage).
This auxiliary voltage supply system supplies various components with 230 V AC including the fans inside the
cabinets of the liquid-cooled Cabinet Modules. It also supplies the electronic modules with an external 24 V DC
voltage. This is required to operate the electronics when the DC link is not charged, for example, in order to maintain
communication via bus systems such as PROFIBUS or PROFINET.
The Auxiliary Power Supply Module is connected to the available 380 V to 690 V voltage
supply in the customer's plant.
The standard version contains the following components:
• Fuse switch disconnector with fuse monitoring for external evaluation.
• Supply of the auxiliary voltage supply system with two fuse-protected auxiliary voltages:
• Transformer with 230 V output voltage.
• SITOP 24 V DC power supply.
• Nickel-plated PE busbar (60 mm x 10 mm), including jumper for looping through to the
Auxiliary Power Supply Module
Note:
On small drive line-ups with low auxiliary power requirements, it is often not meaningful to use an Auxiliary Power
Supply Module to provide the auxiliary voltage supply. In such cases, it is better to generate the auxiliary voltage in
the Line Connection Module of the Basic Line Connection Module or Active Line Connection Module and feed the
voltage with fuse protection from the module into the auxiliary voltage supply system. In this case, option K76 must
be ordered in the Basic Line Connection Module or Active Line Connection Module.
- 230 V AC for supplying 230 V loads (e.g. fans inside cabinets).
- 24 V DC for the electronics power supply
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SINAMICS S120 Cabinet Modules
Engineering Information
SINAMICS Engineering Manual – November 2015
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