Power Supply Unit; Customer Terminal Strips; Options; Internal Synchronizing Voltage Detection (Option A11) - Siemens SINAMICS GL150 Operating And Installation Instructions

Description

3.5 Options

3.4.3.4

Power supply unit

A power supply unit is used for the 24 V power supply for the control compartment and the
power unit of the starting converter. The power supply unit has an input voltage range from
88-350 V DC.
3.4.3.5

Customer terminal strips

The signals are allocated to various terminal strips according to voltage level. The cables are
visually distinguished from one another by various colors. Barriers mechanically separate
cables carrying different potentials on one terminal strip. The terminals are suitable for cables
with a cross-section of 2.5 mm
The default setting and interfaces of the customer terminal strips can be found in the circuit
manual. For information about the position of the customer terminal strips within the cabinet,
see the layout diagrams.
3.5 Options
3.5.1

Internal synchronizing voltage detection (option A11)

The internal synchronizing voltage detection is used to measure the line voltage.
See also
Voltage actual value sensing (Page 37)
3.5.2

Damping switch for 1.4 kV (option C50)

The damping circuit includes a rectifier circuit with RC circuit. The damping circuit is connected
to the output of the starting converter. As a result, oscillations that are caused by cable
capacitance and leakage inductances of the generator and main transformer are attenuated.
The damping circuit is installed in the reactor cabinet above the DC link reactor.
The damping circuit is required for compact excitation systems, for which there is no generator
switch. In cases such as these, a block transformer is connected in parallel to the generator
on whose primary side cables are still connected. This arrangement forms an oscillating circuit
with a natural frequency in the order of magnitude of 1 kHz. The damping circuit dampens the
oscillations to such an extent that no premature zero crossings of the voltage on the thyristor
occur after the thyristor has been switched off.
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SINAMICS GL150 6SL38503UM114PA0Z
Operating Instructions 04/2017