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3.5.22
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.
3.5.23
Damping circuit for 2.9 kV (option C51)
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.
3.5.24
Damping switch for 4.6 kV (option C52)
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.
3.5.25
Duty cycle (option C61)
The starting frequency converter is dimensioned in such a way that the specified duty cycles can
be performed. The duty cycles are possible with the described operating modes without thermal
overload at maximum ambient temperature.
3rd Party LCI Control Upgrade
Operating Instructions, 02/2022, A5E31872818
Description
3.5 Options
45
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