K76, Auxiliary Voltage Generating Unit In The Line Connection Module - Siemens SINAMICS S120 Equipment Manual

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8.11 K76, auxiliary voltage generating unit in the Line Connection Module

8.11 K76, auxiliary voltage generating unit in the Line Connection Module
Availability of option
● Line Connection Module
Description
Cabinet Modules require an auxiliary energy supply to function properly. This current
demand must be included in the configuration and supplied from an external source. If an
external supply is not possible, the required auxiliary voltages can be generated by an
Auxiliary Power Supply Module.
Alternatively, option K76 can be selected to generate the auxiliary voltages in the Line
Connection Module. This is particularly advisable for smaller device configurations.
The following auxiliary voltages are available:
● 380 to 480 V 2 AC or 500 to 690 V 2 AC (poss. tap approx. 80 A)
● 230 V AC (poss. tap approx. 4 to 6 A)
● 24 V DC (poss. tap approx. 20 to 40 A)
The auxiliary voltages can be connected to the auxiliary voltage busbar from the Line
Connection Module, and are therefore able to supply the entire cabinet group from here.
If the Cabinet Modules are delivered as factory-assembled transport units (option Y11), the
electrical installation work has already been carried out.
If the parts are delivered individually, the auxiliary voltage interface must be installed with 3
cables on site.
Adjusting the auxiliary power supply (-A1 -T10)
A transformer is installed in the Line Connection Module (-A1 -T10) for the 230 V AC
auxiliary power supply for the cabinet. The location of the transformer is indicated in the
layout diagrams supplied.
When delivered, the taps are always set to the highest level. The line-side terminals of the
transformer may need to be reconnected to the existing line voltage.
The line voltage assignments for making the appropriate setting on the transformer for the
internal power supply are indicated in the following tables.
354
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A