Studer RCC-02, Руководство пользователя

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Studer Innotec SA
RCC-02/-03
User manual
V4.4.0
59
14.10.9 Sensitiveness of the detection « tolerating » of grid loss (AC-In)
{1510}
With this parameter it is possible to set the sensitivity to detecting microcuts at the Xtender input (AC-
In). A sensitivity of 60 indicates that the transfer opens by a cut equal or higher than 5ms, whereas a
setting on 1 will lead the transfer to open from a cut of 80us.
14.10.10 Transfer AC-In for delayed transfer opening {1199}
This configuration determines the voltage below which the transfer relay will open after a certain
period of time. The Xtender will then run in inverter mode. The connection voltage is set automatically
at 10V over this threshold. This hysteresis allows to avoid repeated commutations when the grid
voltage is close to this threshold.
14.10.11 Delay before passing to inverter {1198}
When the input voltage is below the transfer voltage to the inverter, the transfer relay does not open
immediately. With this configuration, the period during which the transfer remains drawn can be
specified. After this duration, the transfer relay is opened and the inverter function is activated (if the
function has not been blocked or deactivated).
This delay is particularly useful on less stable grids or with generators with an output
voltage that varies considerably during the activation of heavy loads.
14.10.12 Immediate transfer AC-In voltage {1200}
Use the adjustment of this configuration to adjust the critical voltage for the operation of equipment
that must not experience interruptions. In the case of a fluctuating grid, if its voltage passes below
the value of the configuration this immediately activates the inverter function, thereby ensuring
supply to the consumers.
14.10.13 INSTALLER – Absolute maximum input voltage {1432}
This parameter is set to define the max. threshold of the input voltage AC-In. In case of an input
voltage higher than this threshold during 1 period (20 ms at 50 Hz), the transfer relay will be open.
14.10.14 Delta frequency allowed above the standard input frequency
{1505}
This setting allows you to determine the upper limit of the accepted frequency. This value is added
to parameter {1112}, the output frequency of the inverter. If the frequency of the source exceeds this
value, the transfer relay is opened after the duration determined by the setting {1507}.
14.10.15 Delta frequency allowed below the standard input frequency
{1506}
This setting allows you to determine the lower limit of the accepted frequency. This value is subtracted
from parameter {1112}, the output frequency of the inverter. If the frequency of the source is lower
than this value, the transfer relay is opened after the duration determined by this setting {1507}.
14.10.16 Duration of erroneous frequency before disconnecting the transfer
relay {1507}
If the input frequency is not included among the values determined by the settings above, the
transfer relay is deactivated after the duration determined by this setting.