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Protection and Automation Functions
7.7 Directional Overcurrent Protection, Ground
Parameter Value
yes
Parameter: Dynamic settings
•
Default setting (_:4891:26) Dynamic settings = no
This parameter is not visible for the basic stage.
Parameter Value
no
yes
For further setting notes, refer to chapter
tion Overcurrent Protection, Ground.
Parameter: Blk. w. inrush curr. detect.
•
Default setting (_:4891:27) Blk. w. inrush curr. detect. = no
Parameter Value
no
724
Description
If the Directional comparison parameter is set to yes, the
Release via input signal parameter, the
signal, and the
>Release delay & op. input signal become avail-
able.
If the Release via input signal parameter is set to yes, the
starts of the operate delay and operate signal are only enabled when
the
>Release delay & op. input signal is active. The >Release
delay & op. input signal must be connected to the release informa-
tion from the opposite end (forward information from the
tion output signal).
See also the application example in chapter
for Directional Comparison Protection
Description
The influence on the overcurrent-protection stage by device-internal
or external functions is not necessary.
If a device-internal function (Automatic reclosing or Cold-load
pickup detection) or an external function should affect the overcur-
rent-protection stage (such as change the setting of the threshold
value or operate delay, blocking of the stage), the setting must be
changed to yes.
This makes the configuration parameters affected by Auto reclosing/
Cold-load PU/Binary input as well as the dynamic settings
Threshold, Time dial, and Stage blocked of the stage visible
and enables the settings to be set for the specific influence.
7.5.8.2 Application and Setting Notes (Advanced Stage)
Description
The transformer inrush-current detection does not affect the stage.
Select this setting in the following cases:
•
In cases where the device is not used on transformers.
•
In cases where the device is used on transformers and the
threshold value of the stage is set above the maximum inrush
current of the transformer. This applies, for example, to the high-
current stage that is set according to the short-circuit voltage V
of the transformer in such a way that the stage only picks up on
faults from the high-voltage side. The transformer inrush current
cannot become larger than the maximum transmittable shortcir-
cuit current.
Direction output
7.6.10 Application Notes
.
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Direc-
of the func-
sc
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