Siemens 6MD85, Manual

Page: 854 / 1256

The
Threshold
parameter is used to define the pickup threshold of the stage. The
Tilt power charac-
teristic
parameter is used to define the tilt of the pickup characteristic. The figure below shows the defini-
tion of the signs.
[dw_tilt-power active power, 2, en_US]
Figure 7-172 Tilt-Power Characteristic
Pickup
The stage compares the selected power value with the set
Threshold
. Depending on the stage type (Power
P> or Power P<) being above or falling below the threshold value will lead to a pickup.
Dropout Delay
A delay can be set for the dropout when the measured value falls below the dropout threshold. The pickup is
maintained for the specified time. The time delay of the tripping (parameter
Operate delay
) continues to
run. Once the
Operate delay
has elapsed, the stage trips.
Blocking the Stage
In the event of blocking, the picked up stage will be reset. Blocking the stage is possible externally or internally
via the binary input signal
>Block stage
.
Protection and Automation Functions
7.22 Power Protection (P,Q), 3-Phase
854 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017