Application And Setting Notes - Siemens 6MD85 Manual

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
•
Measuring-voltage failure (see chapter
•
Via the functionality of the dynamic settings (only in the advanced function type, see subtitle Influ-
ence of other functions via dynamic settings and chapter
Blocking of the Time Delay (Basic and Advanced Stage)
You can use the binary input signal >Block delay & op. to prevent the start of the time delay and thus
also the operate signal. A running time delay is reset. The pickup is indicated and a fault record is opened.
Blocking of the Operate Delay and the 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
7.6.5.2

Application and Setting Notes

Parameter: Directional mode
•
Default setting (_:8161:111) Directional mode = forward
You use the Directional mode parameter to define the directional mode of the stage.
Parameter Value
forward
reverse
Parameter: Method of measurement
•
Recommended setting value (_:8161:8) Method of measurement = fundamental comp.
With the Method of measurement parameter, you define whether the stage uses the fundamental
comp. (standard method) or the calculated RMS value.
Parameter Value
fundamental comp.
RMS value
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
7.6.3.1 Description
7.4.7.1 Description .
Description
Select this setting if the stage is to work in a forward direction (in the direc-
tion of the line).
Select this setting if the stage is to work in a reverse direction (in the direc-
tion of the busbar).
Description
Select this method of measurement if harmonics or transient current peaks
are to be suppressed.
Siemens recommends using this method as the standard method.
Select this method of measurement if you want the stage to take harmonics
into account (for example, at capacitor banks). Consider that aperiodic DC
components present in the secondary circuit are measured and can cause
an overfunction.
For this method of measurement, do not set the threshold value of the
stage to less than 0.1 I
point are added up in the current interface of a function group, the setting
value should not be set lower than 0.1 I
added currents.
Protection and Automation Functions
7.6 Directional Overcurrent Protection, Phases
)
7.4.8.1 Description
. If currents from more than one measuring
rated,sec
multiplied by the number of
rated,sec
7.6.3.1 Description )
).
683