[dw_pecuse-230813, 2, en_US]
Figure 7-35
Pickup Behavior and Dropout Behavior when Using a User-Defined Characteristic Curve
Application and Setting Notes
This stage is structured the same way as the stage with a inverse-time characteristic (see chapter
7.6.3.2 Application and Setting Notes). The only difference is that you can define the characteristic curve as
desired. This chapter provides only application and setting notes for setting characteristic curves.
Parameter: Voltage/Time Value Pairs (from the Operate Curve)
Use these settings to define the characteristic curve. Set a voltage/time value pair for each point on the charac-
teristic curve. The setting depends on the characteristic curve you want to realize.
Set the voltage to a multiple of the threshold value. In order to obtain a simple relation, Siemens recommends
setting the Threshold parameter to 1.00. You can change the threshold value setting afterwards if you
want to shift the characteristic curve.
Set the time value in seconds. The characteristic curve is shifted via the Time dial parameter.
Set the number of value pairs to be used with DIGSI. You can define a maximum of 30 value pairs.
NOTE
The value pairs must be entered in continuous order.
Parameter: Time dial
•
Default setting (_:101) Time dial = 1
Use the Time dial parameter to displace the characteristic curve in the time direction.
Where no time grading of tripping and thus no shifting of the characteristic curve is required, leave the param-
eter Time dial at 1.
Parameter: Voltage/Time Value Pairs (from the Dropout Characteristic Curve)
Use these settings to define the characteristic curve. Set a voltage/time value pair for each point on the charac-
teristic curve. The setting depends on the characteristic curve you want to realize.
7.6.5.2
Capacitor Bank Protection
7.6 Peak Overvoltage Protection for Capacitors
1030 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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