[DwMinTime_20140708-01.vsd, 1, en_US]
Figure 7-114 Minimum Operating Time of the Curve
Additional Time Delay (Advanced Stage)
With the parameter Additional time delay, you define a definite-time delay in addition to the inverse-
time delay. With this setting, the whole curve is shifted on the time axis by this additional definite time.
Blocking of the Stage (Basic and Advanced Stage)
The following blockings reset the picked up stage completely:
•
Externally or internally via the binary input signal
>Block stage
(see chapter 7.7.4.1 Description)
•
Measuring-voltage failure (see chapter 7.7.4.1 Description)
•
Via the dynamic settings functionality (only available in the advanced function type, see Influence of
Other Functions via Dynamic Settings and chapter 7.7.10 Influence of Other Functions via Dynamic
Settings)
Blocking of the Operate Delay (Basic and Advanced Stage)
You can use the binary input signal
>Block delay & op.
to prevent the start of the operate delay and thus
also the generation of the operate signal. A running operate delay is reset. The pickup is indicated. Fault
logging and fault recording take place.
Blocking of the Operate Delay and Operate Signal via the Device-Internal Inrush-Current Detection Function (Basic
and Advanced Stage)
Blocking of the operate delay and the operate signal via the device-internal Inrush-current detection function
is described in chapter Blocking of the Tripping by Device-Internal Inrush-Current Detection
For more information, refer to 7.5.7.1 Description.
Directional Comparison Protection (Advanced Stage)
The stage can be used for directional comparison protection. This is set using the Directional compar-
ison parameter. With the yes setting, the direction indication
Direction
is released and the direction
(forward or reverse) is determined, if the current exceeds the threshold of the stage. The direction indicated is
independent of the directional mode set for the stage.
The Release via input signal parameter and the
>Release delay & op.
input signal are available
with directional comparison protection. If the Release via input signal parameter is set to yes, the
start of the operate delay, and therefore the operate signal of the stage, are only enabled when the
>Release delay & op.
input signal is active.
Protection and Automation Functions
7.7 Directional Overcurrent Protection, Ground
722 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
To Next Page
Loading...
