Dc-Link Reactor; Avt Combination Module; Figure 3-3 Avt Combination Module - Siemens SINAMICS GL150 Operating And Installation Instructions

Description
3.3 Power unit
A thyristor electronics module is assigned to each thyristor. The thyristor electronics are used
to fire the thyristors. The thyristor electronics are supplied with energy from the RC circuit.
High snubber circuit capacitor voltages
The snubber circuit capacitors are not equipped with discharge resistors. The energy stored
in the capacitors is discharged via a circuit in the thyristor electronics. This circuit is interrupted
when the thyristor electronics are withdrawn.
Voltages of up to several 1000 V can occur and cause an electric shock. This can result in
death, severe injuries and significant material damage.
In this case you should treat the capacitors as if they were charged.
Discharge the snubber circuit capacitors. Short-circuit the snubber circuit capacitors before
you withdraw the thyristor electronics.
See also
Thyristor electronics (Page 36)
3.3.2.3

DC-link reactor

The DC link reactor decouples the line-side converter from the motor-side converter and
smoothes the direct current. In the event of a fault with overcurrent, the DC link reactor limits
the rate of current rise with its inductance, together with the line reactors. Each DC link reactor
consists of two magnetically coupled windings wound on an iron core.
3.3.2.4

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 3-3
32
WARNING
AVT combination module
SINAMICS GL150 6SL38503UM114PA0Z
Operating Instructions 04/2017