Sitop Select; Power Supply Unit; Sirius Safety Relay; Options - Siemens SINAMICS GL150 Operating Instructions & Installation Instructions

3.4.3.4

SITOP Select

The SITOP Select is used to monitor and distribute the load current of the 24 V DC power
supply. The SITOP Select has four independent output channels. The output current of each
channel can be adjusted from between 3 A and 10 A.
Each channel has its own status signal.
● Channel 1 monitors the power supply for the SINAMICS modules.
● Channels 2 and 3 monitor the 24 V DC power supply in the power unit.
● Channel 4 is used to supply the customer terminals and the circuit breaker.
3.4.3.5

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.
3.4.3.6

Sirius safety relay

The safety relay monitors the status of the Emergency Off circuit, and is used to implement a
safety-related shutdown when dangerous conditions occur. LEDs indicate the operating state
and the function.
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 35)
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
SINAMICS GL150 6SL38502UM114PA0Z
Operating Instructions Rev.201910281441 EXAMPLE
Description
3.5 Options
39