NOTICE
Fault due to incorrect configuration of line supply and transformer impedances
On the line side, the converter is designed for short-circuit-proof operation. Short-circuit-proof
operation is only guaranteed if the line supply and transformer impedances are in
conformance with the respective specifications in the system-specific data.
If the supply and transformer impedances cannot be maintained, material damage to the
converter can occur.
Observe the system-specific values in the "Technical data and drawings" chapter.
The leakage reactances of the line transformer and the machine and the incoming line from the
feeding supply system limit overcurrent in the event of internal short circuits and simultaneous
failure of the open-loop and closed-loop control systems. In this case, the circuit breaker
responds sufficiently quickly to prevent consequential damage.
The thermal utilization of the semiconductors is selected such that after a short-circuit current,
the thyristors still have sufficient blocking ability. The converter can cope with virtually any
incident using the fuseless technology and will switch itself off.
3.3.3.3 Thyristor electronics
Gate control and monitoring system
The thyristor electronics consist of the TAS CPLD module (thyristor control and protection,
complex programmable logic device).
The thyristor electronics are part of the thyristor control and monitoring system. They work
together with the Power Stack Adapter (PSA). The thyristor electronics can control all line-side
and motor-side converters which are supplied with voltage by the gate current of the thyristor
RC circuit.
The thyristor electronics module has the following tasks:
● They generate the gate pulses for the thyristors.
● Report information on the thyristor status, the thyristor electronics themselves, and the fiber-
optic cable connection to the Power Stack Adapter.
A thyristor electronics module is assigned to each thyristor.
A communication peer is required in the form of the Power Stack Adapter. The power stack
adapter supplies the optical gating pulses, and evaluates the feedback signals from the
thyristor electronics.
Mode of operation of thyristor electronics
Thyristor electronics are part of the thyristor control system. The thyristor electronics receive
the control signals from the Power Stack Adapter via fiber-optic cables.
Description
3.3 Power unit
SINAMICS SL150 6SL38600UL432AA0Z
Operating Instructions Rev.201910281433 EXAMPLE 35
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