3.3.1.1
AVT combination module
The AVT combination module (Actual Value Transmission) processes signals for sensing the
actual current and voltage values. The AVT combination module converts analog signals into
digital signals. Then the module transfers the signals to the Power Stack Adapter (PSA). The
signals are transferred to the PSA via fiber-optic cables.
Figure 3-1
AVT combination module
See also
Voltage actual value sensing (Page 32)
Ground fault detection (Page 34)
Replacing the AVT combination module (Page 122)
3.3.1.2
Power Stack Adapter
Figure 3-2
Example: Power Stack Adapter
The power stack adapter (PSA) acts as an interface between the power unit and the open-loop/
closed-loop controller. The Power Stack Adapter is also where the power unit is electrically
isolated from the open-loop/closed-loop controller. The DRIVE-CLiQ serial communication
interface ensures the exchange of data between the Power Stack Adapter and Control Unit (CU).
In the Power Stack Adapter, the switching information predefined by the Control Unit is
translated into firing pulses (long pulses). The firing pulses are converted to optical signals and
sent to the thyristor electronics via fiber-optic cables. This initiates firing readiness in the thyristor
Description
3.3 Power unit
3rd Party LCI Control Upgrade
26
Operating Instructions, 02/2022, A5E31872818
